Archive for March 3rd, 2008
My Squid
#OPTION JARINGAN
http_port 3129
icp_port 0
# OPTION UKURAN CACHE
cache_mem 256 MB
cache_swap_low 94
cache_swap_high 96
maximum_object_size 16384 KB
minimum_object_size 4 KB
maximum_object_size_in_memory 2048 KB
fqdncache_size 1024
cache_replacement_policy heap GDSF
memory_replacement_policy heap GDSF
# DIREKTORI LOG DAN CACHE
cache_dir aufs /var/spool/squid 9000 16 256
access_log /var/log/squid/access.log squid
cache_log /var/log/squid/cache.log
cache_store_log none
# TUNING CACHE PROXY
refresh_pattern ^ftp: 1440 20% 10080
refresh_pattern ^gopher: 1440 0% 1440
refresh_pattern . 0 20% 4320
negative_ttl 1 minutes
# TIMEOUT
half_closed_clients off
# Memblok situs terlarang (blacklist)secara manual
acl bad url_regex -i “/etc/squid/blacklist/domain-words”
acl blacklist dstdomain “/etc/squid/blacklist/domain-blacklist”
acl aolyahoo dstdomain shttp.msg.yahoo.com
acl aolyahoo dstdomain pager.yahoo.com
acl aolyahoo dstdomain update.messenger.yahoo.com
acl aolyahoo dstdomain update.pager.yahoo.com
http_access deny bad
http_access deny aolyahoo
http_access deny blacklist
#acl ipblacklist dst “/etc/squid/blacklist/ip-blacklist.txt”
acl tdkbebasdownload time 08:00-16:00
# AKSES KONTROL
acl all src 0.0.0.0/0.0.0.0
acl manager proto cache_object
acl localhost src 127.0.0.1/255.255.255.255
acl to_localhost dst 127.0.0.0/8
acl SSL_ports port 443
acl Safe_ports port 80 # http
acl Safe_ports port 21 # ftp
acl Safe_ports port 443 # https
acl Safe_ports port 70 # gopher
acl Safe_ports port 210 # wais
acl Safe_ports port 1025-65535 # unregistered ports
acl Safe_ports port 280 # http-mgmt
acl Safe_ports port 488 # gss-http
acl Safe_ports port 591 # filemaker
acl Safe_ports port 777 # multiling http
acl CONNECT method CONNECT
# Daftar IP address
acl office src 10.99.1.1-10.99.1.254/255.255.255.255
# Memblok situs terlarang secara manual
# Rule yang saya terapkan
http_access allow office
acl magic_words2 url_regex -i ftp .exe .mp3 .vqf .tar.gz .gz .tar.bz2 .bz2 .rpm .zip .rar .avi .mpeg .mpe .mpg .qt .ram .rm .raw .wav .iso
# Cancel download if file is bigger than 2 MB = 2000×1024 byte = 2048000 byte
reply_body_max_size 2048000 allow magic_words2 tdkbebasdownload
http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports
http_access allow localhost
http_access deny all
http_reply_access allow all
icp_access allow all
# PARAMETER ADMINISTRATOR
#
cache_mgr sysdev@fujistaff.co.id
cache_effective_user squid
cache_effective_group squid
visible_hostname proxy.gateway.local
redirect-program /usr/local/bin/squidGuard -c /etc/squid/squidguard.conf
#tranparent Proxy
httpd_accel_host virtual
httpd_accel_port 80
httpd_accel_with_proxy on
httpd_accel_uses_host_header on
#Added By RS for limit bandwith
#———————— DELAY POLL KONFIGURASI HANNY —————————
#This is the most important part for shaping incoming traffic with Squid
#For detailed description see squid.conf file or docs at http://www.squid-cache.org
#We don’t want to limit downloads on our local network
acl magic_words1 url_regex -i 10.99.
#We want to limit downloads of these type of files
#Put this all in one line
acl magic_words2 url_regex -i ftp .exe .mp3 .vqf .tar.gz .gz .rpm .zip .rar .avi .mpeg .mpe .mpg .qt .ram .rm .iso .raw .wav
#We don’t block .html, .gif, .jpg and similar files, because they
#generally don’t consume much bandwith
#We have two different delay_pools
delay_pools 2
#First delay pool
#W don’t want to delay our local traffic
#There are three pool classes; here we will deal only with the second
delay_class 1 2
#-1/-1 mean that there are no limits
delay_parameters 1 -1/-1 -1/-1
#magic_words1: 10.99
delay_access 1 allow magic_words1
#Second delay pool
#we want to delay downloading files mentioned in magic_words2
delay_class 2 2
#The numbers here are values in bytes;
#we must remember that Squid doesn’t consider start/stop bits
#5000/150000 are values for the whole network
#5000/120000 are values for the single IP
#after downloaded files exceed about 150000 bytes,
#(or even twice or three times as much)
#they will continue to download at about 5000 bytes/s
delay_parameters 2 5000/150000 5000/120000
delay_access 2 allow magic_words2
Add comment March 3, 2008
CCNA Exploration 4.0: Network Fundamentals – Final Exam Answers
Use the ipconfig /all command at the host’s command prompt.
* Use the ping 127.0.0.1 command at the command prompt.
Use the traceroute command at the command prompt to identify any failures on the path to the gateway.
Use FTP to check for connectivity to remote sites.
Download a troubleshooting tool from the PC manufacturer’s website.2
Refer to the exhibit. Which set of devices contains only intermediary devices?
* A, B, D, G
A, B, E, F
C, D, G, I
G, H, I, J3
Refer to the exhibit. When computer A sends a frame to computer D, what computers receive the frame?
* only computer D
only computer A and computer D
only computer B, computer C, and computer D
all computers4 Which password is automatically encrypted when it is created?
vty
aux
console
* enable secret
enable password
5 Which three statements characterize the transport layer protocols? (Choose three.)
* TCP and UDP port numbers are used by application layer protocols.
TCP uses port numbers to provide reliable transportation of IP packets.
UDP uses windowing and acknowledgments for reliable transfer of data.
* TCP uses windowing and sequencing to provide reliable transfer of data.
* TCP is a connection-oriented protocol. UDP is a connectionless protocol.
6 Which type of media is immune to EMI and RFI? (Choose two.)
10 Base-T
10 Base-2
10 Base-5
* 100 Base-FX
100 Base TX
* 1000 Base LX
7
Refer to the exhibit. A technician is working on a network problem that requires verification of the router LAN interface. What address should be pinged from this host to confirm that the router interface is operational?
127.0.0.1
192.168.64.196
* 192.168.254.1
192.168.254.9
192.168.254.254
8
Refer to the exhibit. The diagram represents the process of sending email between clients. Select the list below that correctly identifies the component or protocol used at each numbered stage of the diagram.
1.MUA 2.MDA 3.MTA 4.SMTP 5.MTA 6.POP 7.MDA 8.MUA
1.MUA 2.POP 3.MDA 4.SMTP 5.MTA 6.MDA 7.SMTP 8.MUA
1.MUA 2.POP 3.SMTP 4.MDA 5.MTA 6.SMTP 7.POP 8.MUA
1.MDA 2.SMTP 3.MTA 4.SMTP 5.MTA 6.MUA 7.POP 8.MDA
* 1.MUA 2.SMTP 3.MTA 4.SMTP 5.MTA 6.MDA 7.POP 8.MUA
9
Refer to the exhibit. What function does router RT_A need to provide to allow Internet access for hosts in this network?
* address translation
DHCP services
ftpd
web server
10
Refer to the exhibit. The network containing router B is experiencing problems. A network associate has isolated the issue in this network to router B? What action can be preformed to correct the network issue?
issue the ip address command on interface FastEthernet 0/0
* issue the no shutdown command on interface FastEthernet 0/1
issue the clock rate command on interface Serial 0/0/0
issue the description command on interface Serial 0/0/1
11 Which three IPv4 addresses represent a broadcast for a subnet? (Choose three.)
* 172.16.4.63 /26
172.16.4.129 /26
* 172.16.4.191 /26
172.16.4.51 /27
* 172.16.4.95 /27
172.16.4.221 /27
12 What are three characteristics of CSMA/CD? (Choose three.)
Devices can be configured with a higher transmission priority.
A jam signal indicates that the collision has cleared and the media is not busy.
* A device listens and waits until the media is not busy before transmitting.
The device with the electronic token is the only one that can transmit after a collision.
* All of the devices on a segment see data that passes on the network medium.
* After detecting a collision, hosts can attempt to resume transmission after a random time delay has expired.
13 In a Cisco IOS device, where is the startup-configuration file stored?
Flash
* NVRAM
RAM
ROM
14 A routing issue has occurred in you internetwork. Which of the following type of devices should be examined to isolate this error?
access point
host
hub
* router
switch
15 Which OSI layer protocol does IP rely on to determine whether packets have been lost and to request retransmission?
application
presentation
session
* transport
16 Due to a security violation, the router passwords must be changed. What information can be learned from the following configuration entries? (Choose two.) Router(config)# line vty 0 3 Router(config-line)# password c13c0 Router(config-line)# login
The entries specify three Telnet lines for remote access.
* The entries specify four Telnet lines for remote access.
The entries set the console and Telnet password to “c13c0″.
Telnet access will be denied because the Telnet configuration is incomplete.
* Access will be permitted for Telnet using “c13c0″ as the password.
17 Which prompt represents the appropriate mode used for the copy running-config startup-config command ?
Switch-6J>
* Switch-6J#
Switch-6J(config)#
Switch-6J(config-if)#
Switch-6J(config-line)#
18 Which combination of network id and subnet mask correctly identifies all IP addresses from 172.16.128.0 through 172.16.159.255?
172.16.128.0 255.255.255.224
172.16.128.0 255.255.0.0
172.16.128.0 255.255.192.0
* 172.16.128.0 255.255.224.0
172.16.128.0 255.255.255.192
19 When must a router serial interface be configured with the clock rate command?
when the interface is functioning as a DTE device
when the interface timers have been cleared
when the connected DTE device is shut down
* when the interface is functioning as a DCE device
20 When connectionless protocols are implemented at the lower layers of the OSI model, what are usually used to acknowledge the data receipt and request the retransmission of missing data?
connectionless acknowledgements
* upper-layer connection-oriented protocols
Network layer IP protocols
Transport layer UDP protocols
21 A technician is asked to secure the privileged EXEC mode of a switch by requiring a password. Which type of password would require this login and be considered the most secure?
console
enable
* enable secret
VTY
22
Refer to the exhibit. What is required on host A for a network technician to create the initial configuration on RouterA?
a FTP client
a telnet client
* a terminal emulation program
a web browser
23
Refer to the exhibit. A network administrator remotely accesses the CLI of RouterB from PC1. Which two statements are true about the application layer protocol that is used to make this connection? (Choose two.)
The data is encrypted.
* The connection type is called a VTY session.
A server process is running on PC1.
A GET request is sent to RouterB.
* The application name is the same for the service, protocol, and client.
24 The Layer 4 header contains which type of information to aid in the delivery of data?
* service port number
host logical address
device physical address
virtual connection identifier
25
Refer to the exhibit. What two facts can be determined about the exhibited topology? (Choose two.)
* A single broadcast domain is present
Two logical address ranges are required.
Three broadcast domains are shown.
Four networks are needed.
* Five collision domains exist.
26
Refer to the exhibit. A network technician is trying to determine the correct IP address configuration for Host A. What is a valid configuration for Host A?
IP address: 192.168.100.19; Subnet Mask: 255.255.255.248; Default Gateway: 192.16.1.2
* IP address: 192.168.100.20; Subnet Mask: 255.255.255.240; Default Gateway: 192.168.100.17
IP address: 192.168.100.21; Subnet Mask: 255.255.255.248; Default Gateway: 192.168.100.18
IP address: 192.168.100.22; Subnet Mask: 255.255.255.240; Default Gateway: 10.1.1.5
IP address: 192.168.100.30; Subnet Mask: 255.255.255.240; Default Gateway: 192.168.1.1
IP address: 192.168.100.31; Subnet Mask: 255.255.255.240; Default Gateway: 192.168.100.18
27
Refer to the exhibit. Cable 1 and cable 2 have the ends wired for specific physical layer requirements. The table lists each segment by number and the cable which has been installed by the network technician between the network components on that segment. From the data given, which segments have the correct cable installed? (Choose three.)
* segment1
segment2
* segment3
* segment4
segment5
28 What is true regarding network layer addressing? (Choose three.)
uses a flat structure
prevent broadcasts
* heirarchical
* uniquely identifies each host
48 bits in length
* contains a network portion
29
Refer to the exhibit. A router, whose table is shown, receives a packet that is destined for 192.168.1.4. How will router treat the packet?
The packet will be dropped.
The packet will be forwarded via FastEthernet 0/0.
* The packet will be forwarded to the destination host.
The packet will be forwarded to the 192.168.1.3 next-hop address.
30
Refer to the exhibit. Which two statements describe the information that is represented in the header? (Choose two.)
This is a server response.
The UDP protocol is being used.
* The destination port indicates a Telnet session.
* The return segment will contain a source port of 23.
The next session originated from the client of this session will use the source port number 13358.
31
Refer to the exhibit. What is the correct destination socket number for a web page request from Host A to the web server?
00-08-a3-b6-ce-46
* 198.133.219.25:80
http://www.cisco.com
C 198.133.219.0/24 is directly connected, FastEthernet0/0
32 During the encapsulation process, which identifiers are added at the transport layer?
two networks routing the packets
* two applications communicating the data
two hosts at either end of the communication
two nodes on the local network exchanging the frame
33
Refer to the exhibit. A student has wired each end of a CAT 5e cable as shown. What is the result? (Choose two.)
The cable is unusable and must be rewired.
The cable is suitable for use as a Gigabit Ethernet straight-through.
* The cable is suitable for use as a Fast Ethernet crossover.
The cable is suitable for use as a rollover cable.
The cable is suitable for use as a Gigabit Ethernet crossover.
* The cable is suitable for use between two 100 Mbps Auto-MDIX capable switches.
34
Refer to the exhibit. Assume all devices are using default configurations. How many subnets are required to address the topology that is shown?
1
* 3
4
5
7
35
Refer to the exhibit. On the basis of the IP configuration that is shown, what is the reason that Host A and Host B are unable to communicate outside the local network?
Host A was assigned a network address.
Host B was assigned a multicast address.
Host A and Host B belong to different networks.
* The gateway address was assigned a broadcast address.
36
Refer to the exhibit. Each media link is labeled. What type of cable should be used to connect the different devices?
Connection 1 – rollover cable Connection 2 – straight-through cable Connection 3 – crossover cable
Connection 1 – crossover cable Connection 2 – rollover cable Connection 3 – crossover cable
Connection 1 – straight-through cable Connection 2 – crossover cable Connection 3 – crossover cable
* Connection 1 – straight-through cable Connection 2 – crossover cable Connection 3 – straight-through cable
Connection 1 – crossover cable Connection 2 – straight-through cable Connection 3 – crossover cable
37
Refer to the exhibit. What does the IP address 192.168.33.2 represent?
The host’s default gateway.
The host’s IP address.
* The host’s primary domain name server.
The IP address of the website resolver1.mooki.local.
The IP address of the host’s homepage.
38
Refer to the exhibit. What two facts can be determined from the information that is given? (Choose two.)
This exchange is part of the three-way handshake.
The source port indicates that a Telnet session has been initiated.
The data is flowing from server to client.
* The destination port indicates that an HTTP session has been initiated.
* The data listed is associated with the transport layer.
The source port does not support communication with the destination port that is listed.
39 Which of the following are the address ranges of the private IP addresses? (Choose three.)
* 10.0.0.0 to 10.255.255.255
200.100.50.0 to 200.100.25.255
150.150.0.0 to 150.150.255.255
* 172.16.0.0 to 172.31.255.255
* 192.168.0.0 to 192.168.255.255
127.16.0.0 to 127.31.255.255
40 Which two functions of the OSI model occur at layer two? (Choose two.)
* physical addressing
encoding
routing
cabling
* media access control
41 Which range of port numbers are reserved for services that are commonly used by applications that run on servers?
0 to 255
* 0 to 1023
1024 to 49151
49152 to 65535
42 As network administrator, what is the subnet mask that allows 510 hosts given the IP address 172.30.0.0?
255.255.0.0
255.255.248.0
255.255.252.0
* 255.255.254.0
255.255.255.0
255.255.255.128
43
Refer to the exhibit. The tracert command is initiated from PC1 to the destination PC4. Which device will send a response to the initial packet from PC1?
* London
Paris
Athens
Ankara
PC4
44
Refer to the exhibit. Host A is transmitting data to host B. What addresses will host A use to for the destination IP and MAC addresses in this communication?
Destination MAC: BBBB:BBBB:BBBB Destination IP: 172.22.0.62
Destination MAC: DDDD:DDDD:DDDD Destination IP: 172.22.0.75
Destination MAC: EEEE:EEEE:EEEE Destination IP: 172.22.0.62
Destination MAC: BBBB:BBBB:BBBB Destination IP: 172.22.0.75
* Destination MAC: EEEE:EEEE:EEEE Destination IP: 172.22.0.75
Destination MAC: DDDD:DDDD:DDDD Destination IP: 172.22.0.94
45
Refer to the exhibit. Which logical topology best describes the exhibited network?
star
ring
point-to-point
* multiaccess
mesh
46
Examine the graphic with current configurations. Host A in the Clerical offices failed and was replaced. Although a ping to 127.0.0.1 was successful, the replacement computer can not access the company network. What is the likely cause of the problem?
IP address incorrectly entered
network cables unplugged
* subnet mask incorrectly entered
network card failure
47
Refer to the exhibit. With the router running NAT, what IP addresses can be applied to the computer to allow access to the Internet? (Choose three.)
192.168.18.38
192.168.18.48
* 192.168.18.49
* 192.168.18.52
* 192.168.18.59
192.168.18.63
48
Refer to the exhibit. What three statements are true about the IP configuration that is shown? (Choose three.)
* The address that is assigned to the computer represents private addressing.
* The computer is unable to communicate outside of the local network.
The network of this computer can have 126 hosts.
* The prefix of the computer address is /27.
The IP address that is assigned to the computer is routable on the Internet.
The IP address that is assigned to the computer is a broadcast address.
49
Refer to the exhibit. Host A attempts to establish a TCP/IP session with host C. During this attempt, a frame was captured with the source MAC address 0050.7320.D632 and the destination MAC address 0030.8517.44C4. The packet inside the captured frame has an IP source address 192.168.7.5, and the destination IP address is 192.168.219.24. At which point in the network was this packet captured?
leaving host A
leaving ATL
* leaving Dallas
leaving NYC
50 Which of the following OSI layers offers reliable, connection-oriented data communication services?
application
presentation
session
transport
* network
Add comment March 3, 2008
CCNA Exploration 4.0: Network Fundamentals – Chapter 11 Exam Answers
Refer to the exhibit. What command will place the router into the correct mode to configure an appropriate interface to connect to a LAN?
UBAMA# configure terminal
UBAMA(config)# line vty 0 4
UBAMA(config)# line console 0
UBAMA(config)# interface Serial 0/0/0
* UBAMA(config)# interface FastEthernet 0/12
In a Cisco router, when do changes made to the running-configuration take effect?
after a system restart
as the commands are entered
when logging off the system
* when the configuration is saved to the startup-configuration3
Refer to the exhibit. A technician applies the configuration in the exhibit to a clean router. To verify the configuration, the technician issues the show running-config command in the CLI session with the router. What lines should the technician expect to see in the router output from the show running-config command?
line console 0
password ccna
enable password class
line console 0
password ccna
enable password class
line console 0
password ccna
enable password 7 14141E0A1F17
line console 0
password 7 020507550A
enable password 7 14141E0A1F17
line console 0
password 7 020507550A4
When network services fail, which port is most often used to access a router for management purposes?
AUX
Ethernet
* Console
Telnet
SSH5
Refer to the exhibit. A network administrator on HostA has problems accessing the FTP server. Layer three connectivity testing was successful from HostA to the S1 interface of RouterB. Which set of commands will allow the network administrator to telnet to RouterB and run debug commands?
RouterB(config)# line vty 0 4
RouterB(config-if)# login
RouterB(config)# line vty 0 2
RouterB(config-vty)# password cisco
RouterB(config-vty)# login
RouterB(config)# line vty 0
RouterB(config-line)# password cisco
RouterB(config-line)# login
RouterB(config)# line aux 0
RouterB(config-line)# password cisco
RouterB(config-line)# login
RouterB(config)# line aux 0
RouterB(config-vty)# password cisco
RouterB(config-vty)# login6
Users in the network are experiencing slow response time when doing file transfers to a remote server. What command could be issued to determine if the router has experienced any input or output errors?
show running-config
show startup-config
* show interfaces
show ip route
show version
show memory7
Refer to the exhibit. Which names correctly identify the CLI mode represented by the prompt for Switch-East4#? (Choose two.)
line configuration mode
user executive mode
* global configuration mode
privileged executive mode
interface configuration mode
* enable mode8
What command is used to change the default router name to Fontana?
Router# name Fontana
Router# hostname Fontana
Router(config)# name Fontana
* Router(config)# hostname Fontana
9
The serial connection shown in the graphic needs to be configured. Which configuration commands must be made on the Sydney router to establish connectivity with the Melbourne site? (Choose three.)
* Sydney(config-if)# ip address 201.100.53.2 255.255.255.0
* Sydney(config-if)# no shutdown
Sydney(config-if)# ip address 201.100.53.1 255.255.255.224
* Sydney(config-if)# clock rate 56000
Sydney(config-if)# ip host Melbourne 201.100.53.2
10
Refer to the exhibit. The output is shown for the show ip route command executed on Router A. What does the IP address 192.168.2.2 represent?
Gateway for the 192.168.1.0 network
Gateway for the 192.168.3.0 network
IP assigned to the serial port on Router A
* IP assigned to the serial port on Router B
11
Refer to the exhibit. What additional command is required to allow remote access to this switch?
NA-SW1(config-if)# no shutdown
NA-SW1(config)# enable password password
* NA-SW1(config)# ip default-gateway address
NA-SW1(config-if)# description description
12
Immediately after a router completes its boot sequence, the network administrator wants to check the routers configuration. From privileged EXEC mode, which of the following commands can the administrator use for this purpose? (Choose two.)
show flash
show NVRAM
* show startup-config
* show running-config
show version
13
Which three terms correctly define the forms of help available within the Cisco IOS? (Choose three.)
hot keys
* context-check
context-sensitive
* structured check
command override
* command syntax check
14
Refer to the exhibit. A student is responsible for the IP addressing, configuration and connectivity testing of the network shown in the graphic. A ping from host B to host C results in a destination unreachable but a ping from host B to host A was successful. What two reasons could account for this failure based on the graphic and partial router output for the Dallas router? (Choose two.)
The host A is turned off.
The Fa0/0 interface on Dallas is shutdown.
The LAN cable is disconnected from host B.
* The S0/0/1 IP address of Dallas is improperly configured.
* The Fa0/0 interface on Dallas is in a different subnet than host B.
The clock rate is missing on the serial link between Dallas and NYC.
15
Which combination of keys would be used at the CLI prompt to interrupt a ping or traceroute process?
* Ctrl-C
Ctrl-P
Ctrl-R
Ctrl-Shift-6
Ctrl-Z
16
The connection between routers B and C has been successfully tested. However, after rebooting router C, the administrator noticed the response time between networks 10.10.3.0 and 10.10.4.0 is slower. Ping between the two routers is successful. A trace route indicates three hops from router B to router C. What else can be done to troubleshoot the problem?
Ping router B S0/1 connection from router C.
Trace the connection between router B to router C S0/1.
Issue a show ip route command in router B to verify routing is enabled.
* Issue a show interfaces command on router C.
17
In a Cisco device, where is the IOS file stored prior to system startup?
RAM
ROM
* Flash
NVRAM
18
On a Cisco router, which interface would be used to make the initial configuration?
toinen
19
A network administrator needs to keep the user ID, password, and session contents private when establishing remote CLI connectivity with a router to manage it. Which access method should be chosen?
Telnet
Console
AUX
* SSH
3 comments March 3, 2008
CCNA Exploration 4.0: Network Fundamentals – Chapter 10 Exam Answers
Refer to the exhibit. A student working in the lab selects a cable that is wired as shown. Which connection types can successfully be made with this cable? (Choose two.)
connecting a PC to a router’s console port
* connecting two routers together via their fast ethernet ports
* connecting two switches together at gigabit speeds
connecting a PC to a switch at Gigabit Ethernet speeds
connecting two devices with the same interface type at Fast Ethernet speeds2
Which three statements are true about the role of routers in the network? (Choose three.)
They propagate broadcasts.
They enlarge collision domains.
They segment broadcast domains.
* They interconnect different network technologies.
* Each router interface requires a separate network or subnet.
* They maintain a common frame format between LAN and WAN interfaces.3
Refer to the exhibit. A network administrator has decided to use packet capture software to evaluate all traffic from the student subnet on the way to the Internet. To ensure that all packets are captured, what network device should be used to connect the monitoring station to the network between R1 and R2?
* router
hub
switch
wireless access point4
A network administrator is required to use media in the network that can run up to 100 meters in cable length without using repeaters. The chosen media must be inexpensive and easily installed. The installation will be in a pre-existing building with limited cabling space. Which type of media would best meet these requirements?
STP
* UTP
coaxial
single-mode fiber
multimode fiber
5
Refer to the exhibit. Which three statements are true about the exhibited topology? (Choose three.)
Hosts B and C are in the same subnet.
* Five broadcast domains are present.
* Host B is using a crossover cable to connect to the router.
Four broadcast domains are present.
*Five networks are shown.
Host B is using a rollover cable to connect to the router.
6
Which three types of connectors are commonly associated with Cisco’s V.35 serial cables? (Choose three.)
RJ 11
* DB 60
* Winchester 15 pin
DB 9
* smart serial
RJ 45
7
How many host addresses may be assigned on each subnetwork when using the 130.68.0.0 network address with a subnet mask of 255.255.248.0?
30
256
* 2046
2048
4094
4096
8
Refer to the exhibit. Based on the IP configuration shown, what would be the result of Host A and Host B attempting to communicate outside the network segment?
both host A and B would be successful
* host A would be successful, host B would fail
host B would be successful, host A would fail
both Host A and B would fail
9
Refer to the exhibit. What destination IP address will PC1 place in the header for a packet destined for PC2?
192.168.1.1
192.168.2.1
192.168.2.2
192.168.3.1
* 192.168.3.54
10
Refer to the exhibit. Which three statements identify the type of cabling that would be used in the segments that are shown? (Choose three.)
Segment 1 uses backbone cabling.
* Segment 1 uses a patch cable.
Segment 3 uses patch cabling.
Segment 3 uses vertical cabling.
* Segment 3 uses horizontal cabling.
* Segment 4 uses vertical cabling.
11
A company is planning to subnet its network for a maximum of 27 hosts. Which subnet mask would provide the needed hosts and leave the fewest unused addresses in each subnet?
255.255.255.0
255.255.255.192
* 255.255.255.224
255.255.255.240
255.255.255.248
12
Refer to the exhibit. A student is setting up a home network primarily used for extensive file transfers, streaming video, and gaming. Which network device is best suited to these types of activities in the topology shown?
wireless access point
router
hub
* switch
13
Refer to the exhibit. How many subnets are required to support the network that is shown?
2
* 3
4
5
14
What does the term “attenuation” mean in data communication?
* loss of signal strength as distance increases
time for a signal to reach its destination
leakage of signals from one cable pair to another
strengthening of a signal by a networking device
15
To establish a console connection from a computer to a Cisco router, which cable wiring option would be used?
* crossover cable
straight through cable
rollover cable
V.35 cable
16
What makes fiber preferable to copper cabling for interconnecting buildings? (Choose three.)
* greater distances per cable run
lower installation cost
*limited susceptibility to EMI/RFI
durable connections
*greater bandwidth potential
easily terminated
17
Refer to the exhibit. A network technician has been allocated the 192.168.1.0/24 private IP address range for use in the network that shown in the exhibit. Which subnet mask would be used to meet the host requirements for segment A of this internetwork?
* 255.255.255.128
255.255.255.192
255.255.255.224
255.255.255.240
255.255.255.248
18
Which subnet mask would be assigned to the network address of 192.168.32.0 to provide 254 useable host addresses per subnetwork?
255.255.0.0
* 255.255.255.0
255.255.254.0
255.255.248.0
19
What type of network cable is used between a terminal and a console port?
cross-over
straight-through
* roll-over
patch cable
20
Which option identifies the primary interface which would be used for initial configuration of a Cisco router?
AUX interface
Ethernet interface
serial interface
* console interface
21
What are three common methods for setting a UTP Ethernet port to MDI or MDIX operation? (Choose three.)
direct configuration of the device
* cable color code association
cable selection and configuration
use of cable testers to determine pinouts
* the enabling of the mechanism to electrically swap the transmit and receive pairs
* the automatic detection and negotiating of MDI/MDIX operation of the port
22
Which device is used to create or divide broadcast domains?
hub
switch
bridge
* router
repeater
23
Refer to the exhibit. Assume that all devices are using default settings. How many subnets are required to address the topology that is shown?
1
3
4
* 5
7
Add comment March 3, 2008
CCNA Exploration 4.0: Network Fundamentals – Chapter 9 Exam Answers
1
In the graphic, Host A has reached 50% completion in sending a 1 KB Ethernet frame to Host D when Host B wishes to transmit its own frame to Host C. What must Host B do?
Host B can transmit immediately since it is connected on its own cable segment.
Host B must wait to receive a CSMA transmission from the hub, to signal its turn.
Host B must send a request signal to Host A by transmitting an interframe gap.
* Host B must wait until it is certain that Host A has completed sending its frame.
2 Ethernet operates at which layers of the OSI model? (Choose two.)
Network layer
Transport layer
* Physical layer
Application layer
Session layer
* Data-link layer
3 Which of the following describe interframe spacing? (Choose two.)
* the minimum interval, measured in bit-times, that any station must wait before sending another frame
the maximum interval, measured in bit-times, that any station must wait before sending another frame
the 96-bit payload padding inserted into a frame to achieve a legal frame size
the 96-bit frame padding transmitted between frames to achieve proper synchronization
* the time allowed for slow stations to process a frame and prepare for the next frame
the maximum interval within which a station must send another frame to avoid being considered unreachable
4 What three primary functions does data link layer encapsulation provide? (Choose three.)
* addressing
* error detection
* frame delimiting
port identification
path determination
IP address resolution
5 When a collision occurs in a network using CSMA/CD, how do hosts with data to transmit respond after the backoff period has expired?
* The hosts return to a listen-before-transmit mode.
The hosts creating the collision have priority to send data.
The hosts creating the collision retransmit the last 16 frames.
The hosts extend their delay period to allow for rapid transmission.
6 What are three functions of the upper data link sublayer in the OSI model? (Choose three.)
recognizes streams of bits
* identifies the network layer protocol
* makes the connection with the upper layers identifies the source and destination applications
* insulates network layer protocols from changes in physical equipment
determines the source of a transmission when multiple devices are transmitting
7 What does the IEEE 802.2 standard represent in Ethernet technologies?
MAC sublayer
Physical layer
* Logical Link
Control sublayer
Network layer
8 Why do hosts on an Ethernet segment that experience a collision use a random delay before attempting to transmit a frame?
A random delay is used to ensure a collision-free link.
A random delay value for each device is assigned by the manufacturer.
A standard delay value could not be agreed upon among networking device vendors.
* A random delay helps prevent the stations from experiencing another collision during the transmission.
9 Refer to the exhibit. Which option correctly matches the frame field type with the contents that frame field includes?
* header field – preamble and stop frame
data field – network layer packet
data field – physical addressing
trailer field – FCS and SoF
10 Host A has an IP address of 172.16.225.93 and a mask of 255.255.248.0. Host A needs to communicate with a new host whose IP is 172.16.231.78. Host A performs the ANDing operation on the destination address. What two things will occur? (Choose two.)
Host A will change the destination IP to the IP of the nearest router and forward the packet.
Host A will broadcast an ARP request for the MAC of its default gateway.
A result of 172.16.225.0 will be obtained.
* Host A will broadcast an ARP request for the MAC of the destination host.
A result of 172.16.224.0 will be obtained.
* A result of 172.16.225.255 will be obtained.
11 Which of the following is a drawback of the CSMA/CD access method?
* Collisions can decrease network performance.
It is more complex than non-deterministic protocols.
Deterministic media access protocols slow network performance.
CSMA/CD LAN technologies are only available at slower speeds than other LAN technologies.
12 Ethernet operates at which layer of the TCP/IP network model?
application
physical
transport
internet
data link
* network access
13 What is the primary purpose of ARP?
translate URLs to IP addresses
* resolve IPv4 addresses to MAC addresses
provide dynamic IP configuration to network devices
convert internal private addresses to external public addresses
14
Refer to the exhibit. The switch and workstation are administratively configured for full-duplex operation. Which statement accurately reflects the operation of this link?
* No collisions will occur on this link.
Only one of the devices can transmit at a time.
The switch will have priority for transmitting data.
The devices will default back to half duplex if excessive collisions occur.
15
Refer to the exhibit. Host_A is attempting to contact Server_B. Which statements correctly describe the addressing Host_A will generate in the process? (Choose two.)
A packet with the destination IP of Router_B.
A frame with the destination MAC address of Switch_A.
A packet with the destination IP of Router_A.
* A frame with the destination MAC address of Router_A.
* A packet with the destination IP of Server_B.
A frame with the destination MAC address of Server_B.
16 Which statements correctly describe MAC addresses? (Choose three.)
dynamically assigned
* copied into RAM during system startup
layer 3 address
* contains a 3 byte OUI
* 6 bytes long
32 bits long
17 Which two features make switches preferable to hubs in Ethernet-based networks? (Choose two.)
reduction in cross-talk
* minimizing of collisions
support for UTP cabling
* division into broadcast domains
increase in the throughput of communications
18 What are the two most commonly used media types in Ethernet networks today? (Choose two.)
* coaxial thicknet
copper UTP
coaxial thinnet
optical fiber
* shielded twisted pair
19 Convert the binary number 10111010 into its hexadecimal equivalent. Select the correct answer from the list below.
85
90
* BA
A1
B3
1C
20 After an Ethernet collision, when the backoff algorithm is invoked, which device has priority to transmit data?
the device involved in the collision with the lowest MAC address
the device involved in the collision with the lowest IP address
* any device in the collision domain whose backoff timer expires first
those that began transmitting at the same time
Refer to the exhibit. What command was executed on a host computer to produce the results shown?
route PRINT
* arp -a
arp -d
netstat
telnet
1 comment March 3, 2008
CCNA Exploration 4.0: Network Fundamentals – Chapter 8 Exam Answers
* backbone cable
horizontal cable
patch cable
work area cable2
In most business LANs, which connector is used with twisted-pair networking cable?
BNC
RJ-11
* RJ-45
Type F3
When is a straight-through cable used in a network?
when connecting a router through the console port
when connecting one switch to another switch
* when connecting a host to a switch
when connecting a router to another router4
With the use of unshielded twisted-pair copper wire in a network, what causes crosstalk within the cable pairs?
* the magnetic field around the adjacent pairs of wire
the use of braided wire to shield the adjacent wire pairs
the reflection of the electrical wave back from the far end of the cable
the collision caused by two nodes trying to use the media simultaneously
5
Which OSI layer is responsible for binary transmission, cable specification, and physical aspects of network communication?
Presentation
Transport
Data Link
* Physical
6
An installed fiber run can be checked for faults, integrity, and the performance of the media by using what device?
light injector
* OTDR
TDR
multimeter
7
XYZ Company is installing new cable runs on their data network. What two types of cable would most commonly be used for new runs? (Choose two.)
* coax
Cat4 UTP
Cat5 UTP
* Cat6 UTP
STP
8
What is a possible effect of improperly applying a connector to a network cable?
Data will be forwarded to the wrong node.
* Data transmitted through that cable may experience signal loss.
An improper signaling method will be implemented for data transmitted on that cable.
The encoding method for data sent on that cable will change to compensate for the improper connection.
9
What are three measures of data transfer? (Choose three.)
goodput
* frequency
amplitude
* throughput
crosstalk
**bandwidth
10
Refer to the exhibit. Which type of Category 5 cable is used to make an Ethernet connection between Host A and Host B?
coax cable
rollover cable
* crossover cable
straight-through cable
11
In LAN installations where potential electrical hazards or electromagnetic interference may be present, what type of media is recommended for backbone cabling?
coax
* fiber
Cat5e UTP
Cat6 UTP
STP
12
Which fiber connector supports full duplex Ethernet?
* 
13
Which method of signal transmission uses radio waves to carry signals?
electrical
optical
* wireless
acoustic
14
Which characteristics describe fiber optic cable? (Choose two.)
* It is not affected by EMI or RFI.
Each pair of cables is wrapped in metallic foil.
It combines the technique of cancellation, shielding and twisting to protect data.
It has a maximum speed of 100 Mbps.
* It is the most expensive type of LAN cabling.
15
Which of the following is a characteristic of single-mode fiber-optic cable?
* generally uses LEDs as the light source
relatively larger core with multiple light paths
less expensive than multimode
generally uses lasers as the light source
16
What is considered a benefit of wireless as a media choice?
* more host mobility
lower security risks
reduced susceptibility to interference
less impact of the surroundings on the effective coverage area
17
What characteristic of UTP cable helps reduce the effects of interference?
the metal braiding in the shielding
the reflective cladding around core
* the twisting of the wires in the cable
the insulating material in the outer jacket
18
What is a primary role of the Physical layer in transmitting data on the network?
* create the signals that represent the bits in each frame on to the media
provide physical addressing to the devices
determine the path packets take through the network
control data access to the media
4 comments March 3, 2008
CCNA Exploration 4.0: Network Fundamentals – Chapter 7 Exam Answers
Which options are properties of contention-based media access for a shared media? (Choose three.)
* non-deterministic
* less overhead
one station transmits at a time
* collisions exist
devices must wait their turn
token passing2
What is a primary purpose of encapsulating packets into frames?
provide routes across the internetwork
format the data for presentation to the user
* facilitate the entry and exit of data on media
identify the services to which transported data is associated3
Refer to the exhibit. How many unique CRC calculations will take place as traffic routes from the PC to the laptop?
1
* 2
4
84
What is true concerning physical and logical topologies?
The logical topology is always the same as the physical topology.
Physical topologies are concerned with how a network transfers frames.
Physical signal paths are defined by Data Link layer protocols.
* Logical topologies consist of virtual connections between nodes.5
Refer to the exhibit. Assuming that the network in the exhibit is converged meaning the routing tables and ARP tables are complete, which MAC address will Host A place in the destination address field of Ethernet frames destined for www.server?
00-1c-41-ab-c0-00
* 00-0c-85-cf-65-c0
00-0c-85-cf-65-c1
00-12-3f-32-05-af6
What are three characteristics of valid Ethernet Layer 2 addresses? (Choose three.)
* They are 48 binary bits in length.
They are considered physical addresses.
* They are generally represented in hexadecimal format.
They consist of four eight-bit octets of binary numbers.
They are used to determine the data path through the network.
* They must be changed when an Ethernet device is added or moved within the network.
7
Refer to the exhibit. A frame is being sent from the PC to the laptop. Which source MAC and IP addresses will be included in the frame as it leaves RouterB? (Choose two.)
source MAC – PC
source MAC – S0/0 on RouterA
* source MAC – Fa0/1 on RouterB
* source IP – PC
source IP – S0/0 on RouterA
source IP – Fa0/1 of RouterB
8
What determines the method of media access control? (Choose two.)
network layer addressing
* media sharing
application processes
* logical topology
intermediary device function
9
What is the purpose of the preamble in an Ethernet frame?
is used as a pad for data
identifies the source address
identifies the destination address
marks the end of timing information
* is used for timing synchronization with alternating patterns of ones and zeros
10
What statements are true regarding addresses found at each layer of the OSI model? (Choose two.)
* Layer 2 may identify devices by a physical address burned into the network card
Layer 2 identifies the applications that are communicating
* Layer 3 represents a hierarchical addressing scheme
Layer 4 directs communication to the proper destination network
Layer 4 addresses are used by intermediary devices to forward data
11
Which statements describe the logical token-passing topology? (Choose two.)
Network usage is on a first come, first serve basis.
* Computers are allowed to transmit data only when they possess a token.
Data from a host is received by all other hosts.
* Electronic tokens are passed sequentially to each other.
Token passing networks have problems with high collision rates.
12
Which sublayer of the data link layer prepares a signal to be transmitted at the physical layer?
LLC
* MAC
HDLC
NIC
13
What is true regarding media access control? (Choose three.)
* Ethernet utilizes CSMA/CD
* defined as placement of data frames on the media
contention-based access is also known as deterministic
802.11 utilizes CSMA/CD
* Data Link layer protocols define the rules for access to different media
controlled access contains data collisions
14
What is a characteristic of a logical point-to-point topology?
The nodes are physically connected.
The physical arrangement of the nodes is restricted.
* The media access control protocol can be very simple.
The data link layer protocol used over the link requires a large frame header.
15
What two facts are true when a device is moved from one network or subnet to another? (Choose two.)
The Layer 2 address must be reassigned.
The default gateway address should not be changed.
* The device will still operate at the same Layer 2 address.
Applications and services will need additional port numbers assigned.
* The Layer 3 address must be reassigned to allow communications to the new network.
16
What is a function of the data link layer?
provides the formatting of data
provides end-to-end delivery of data between hosts
provides delivery of data between two applications
* provides for the exchange data over a common local media
17
Which three factors should be considered when implementing a Layer 2 protocol in a network? (Choose three.)
the Layer 3 protocol selected
* the geographic scope of the network
the PDU defined by the transport layer
* the physical layer implementation
* the number of hosts to be interconnected
18
What is the primary purpose of the trailer in a data link layer frame?
define the logical topology
provide media access control
* support frame error detection
carry routing information for the frame
19
A network administrator has been asked to provide a graphic representation of exactly where the company network wiring and equipment are located in the building. What is this type of drawing?
logical topology
* physical topology
cable path
wiring grid
access topology
20
Refer to the exhibit. Which statement describes the media access control methods that are used by the networks in the exhibit?
All three networks use CSMA/CA
None of the networks require media access control.
* Network 1 uses CSMA/CD and Network 3 uses CSMA/CA.
Network 1 uses CSMA/CA and Network 2 uses CSMA/CD.
Network 2 uses CSMA/CA and Network 3 uses CSMA/CD.
4 comments March 3, 2008
CCNA Exploration 4.0: Network Fundamentals – Chapter 6 Exam Answers
How many bits make up an IPv4 address?128
64
48
* 32
Refer to the exhibit. A network administrator has to develop an IP addressing scheme that uses the 192.168.1.0 /24 address space. The network that contains the serial link has already been addressed out of a separate range. Each network will be allocated the same number of host addresses. Which network mask will be appropriate to address the remaining networks?255.255.255.248
255.255.255.224
* 255.255.255.192
255.255.255.240
255.255.255.128
255.255.255.2523
Refer to the exhibit. The network administrator has assigned the internetwork of LBMISS an address range of 192.168.10.0. This address range has been subnetted using a /29 mask. In order to accommodate a new building, the technician has decided to use the fifth subnet for configuring the new network (subnet zero is the first subnet). By company policies, the router interface is always assigned the first usable host address and the workgroup server is given the last usable host address. Which configuration should be entered into the workgroup server’s properties to allow connectivity to the network?
IP address: 192.168.10.38 subnet mask: 255.255.255.240 default gateway: 192.168.10.39
IP address: 192.168.10.38 subnet mask: 255.255.255.240 default gateway: 192.168.10.33
* IP address: 192.168.10.38 subnet mask: 255.255.255.248 default gateway: 192.168.10.33
IP address: 192.168.10.39 subnet mask: 255.255.255.248 default gateway: 192.168.10.31
IP address: 192.168.10.254 subnet mask: 255.255.255.0 default gateway: 192.168.10.1
4
Refer to the exhibit. Which network prefix will work with the IP addressing scheme shown in the graphic.
/24
/16
/20
* /27
/25
/28
5
Refer to the exhibit. A network administrator discovers that host A is having trouble with Internet connectivity, but the server farm has full connectivity. In addition, host A has full connectivity to the server farm. What is a possible cause of this problem?
The router has an incorrect gateway.
Host A has an overlapping network address.
Host A has an incorrect default gateway configured.
Host A has an incorrect subnet mask.
* NAT is required for the host A network.
6
What subnet mask would a network administrator assign to a network address of 172.30.1.0 if it were possible to have up to 254 hosts?
255.255.0.0
* 255.255.255.0
255.255.254.0
255.255.248.0
7
Given the IP address and subnet mask of 172.16.134.64 255.255.255.224, which of the following would describe this address?
This is a useable host address.
This is a broadcast address.
* This is a network address.
This is not a valid address.
8
What three facts are true about the network portion of an IPv4 address? (Choose three.)
identifies an individual device
is identical for all hosts in a broadcast domain
* is altered as packet is forwarded
* varies in length
* is used to forward packets
uses flat addressing
9
What is the network address of the host 172.25.67.99 /23 in binary?
10101100. 00011001.01000011.00000000
10101100. 00011001.01000011.11111111
* 10101100. 00011001.01000010.00000000
10101100. 00011001.01000010.01100011
10101100. 00010001.01000011. 01100010
10101100. 00011001.00000000.00000000
10
A router interface has been assigned an IP address of 172.16.192.166 with a mask of 255.255.255.248. To which subnet does the IP address belong?
172.16.0.0
172.16.192.0
172.16.192.128
* 172.16.192.160
172.16.192.168
172.16.192.176
11
Refer to the exhibit. Why would the response shown be displayed after issuing the command ping 127.0.0.1 on a PC?
* The IP settings are not properly configured on the host.
Internet Protocol is not properly installed on the host.
There is a problem at the physical or data link layer.
The default gateway device is not operating.
A router on the path to the destination host has gone down.
12
What two things will happen if a router receives an ICMP packet which has a TTL value of 1 and the destination host is several hops away? (Choose two.)
The router will discard the packet.
The router will decrement the TTL value and forward the packet to the next router on the path to the destination host.
* The router will send a time exceeded message to the source host.
The router will increment the TTL value and forward the packet to the next router on the path to the destination host.
* The router will send an ICMP Redirect Message to the source host.
13
Refer to the exhibit. An administrator is designing security rules for the 192.168.22.0 /24 network. Each security rule requires an address and mask pair to represent the machines that will be affected by the rule. Which two address and mask pairs will be the most precise way to reference the servers and hosts separately. (Choose two.)
192.168.22.40 255.255.255.248
192.168.22.40 255.255.255.252
192.168.22.100 255.255.255.128
* 192.168.22.100 255.255.255.254
* 192.168.22.1 255.255.255.192
192.168.22.101 255.255.255.224
14
Which of the following are features of IPv6? (Choose three.)
* larger address space
faster routing protocols
* data types and classes of service
* authentication and encryption
improved host naming conventions
same addressing scheme as IPv4
15
Which process do routers use to determine the subnet network address based upon a given IP address and subnet mask?
binary adding
hexadecimal anding
binary division
binary multiplication
* binary ANDing
16
What is the primary reason for development of IPv6?
security
header format simplification
* expanded addressing capabilities
addressing simplification
17
Which three IP addresses are private? (Choose three.)
172.168.33.1
* 10.35.66.70
* 192.168.99.5
* 172.18.88.90
192.33.55.89
172.35.16.5
18
Which statements are true regarding IP addressing? (Choose two.)
NAT translates public addresses to private addresses destined for the Internet.
Only one company is allowed to use a specific private network address space.
* Private addresses are blocked from public Internet by router.
Network 172.32.0.0 is part of the private address space.
* IP address 127.0.0.1 can be used for a host to direct traffic to itself.
19
Which IPv4 subnetted addresses represent valid host addresses? (Choose three.)
172.16.4.127 /26
* 172.16.4.155 /26
* 172.16.4.193 /26
172.16.4.95 /27
172.16.4.159 /27
* 172.16.4.207 /27
20
What is a group of hosts called that have identical bit patterns in the high order bits of their addresses?
an internet
* a network
an octet
* a radi
21
Refer to the exhibit. Host A is connected to the LAN, but it cannot get access to any resources on the Internet. The configuration of the host is shown in the exhibit. What could be the cause of the problem?
The host subnet mask is incorrect.
The default gateway is a network address.
The default gateway is a broadcast address.
* The default gateway is on a different subnet from the host.
22
Which of the following network devices are recommended to be assigned static IP addresses? (Choose three.)
LAN workstations
* servers
* network printers
* routers
remote workstations
laptops
1 comment March 3, 2008
CCNA Exploration 4.0: Network Fundamentals – Chapter 3 Exam Answers
1 A network administrator is designing a network for a new branch office of twenty-five users. What are the advantages of using a client-server model? (Choose two.)
* centralized administration
does not require specialized software
* security is easier to enforce
lower cost implementation
provides a single point of failure
2 Which of the following are benefits of peer-to-peer networks? (Choose three.)
centralized security
* easy to create
very scalable
* no centralized equipment required
* centralized administrator not required
centralized control of assets
3 Which two protocols are used to control the transfer of web resources from a web server to a client browser? (Choose two.)
ASP
FTP
HTML
* HTTP
* HTTPS
IP
4 Which statements are correct concerning the role of the MTA in handling email? (Choose three.)
routes email to the MDA on other servers
* receives email from the client’s MUA
receives email via the POP3 protocol
* passes email to the MDA for final delivery
* uses SMTP to route email between servers
delivers email to clients via the POP3 protocol
5 What is the automated service that matches resource names with the required IP address?
HTTP
SSH
FQDN
* DNS
Telnet
SMTP
6 What three protocols operate at the Application layer of the OSI model? (Choose three.)
ARP
* DNS
PPP
* SMTP
* POP
ICMP
7 What are the two forms of application layer software? (Choose two.)
* applications
processes
* services
dialogs
syntax
daemons
8 What are three properties of peer-to-peer applications? (Choose three.)
* acts as both a client and server within the same communication
requires centralized account administration
* hybrid mode includes a centralized directory of files
* can be used in client-server networks
does not require specialized software
centralized authentication is required
9 Which application layer protocols correctly match a corresponding function? (Choose two.)
DNS dynamically allocates IP addresses to hosts
* HTTP transfers data from a web server to a client
POP delivers email from the client to the server email server
SMTP supports file sharing
Telnet provides a virtual connection for remote access
10 Which are valid DNS resource record types? (Choose three.)
* A
* NS
MTA
* MX
FQDN
MAU
11 Which email components are used to forward mail between servers? (Choose two.)
MDA
IMAP
* MTA
POP
* SMTP
MUA
12 What is the primary disadvantage of telnet?
does not support authentication
consumes network bandwidth
utilizes client resources
not widely available
* does not support encryption
requires remote access
13 What are three common HTTP message types? (Choose three.)
* GET
PUSH
* POST
HTML
UPLOAD
* PUT
14 Which of the following are examples of TCP/IP application layer protocols? (Choose three.)
* a terminal emulation protocol that supports remote console connections with various network devices
a protocol created by IBM that makes it easier for mainframes to connect to remote offices
* a protocol responsible for transporting electronic mail on TCP/IP networks and the Internet
a protocol that controls the rate at which data is sent to another computer
* a protocol that exchanges network management information between a network device and a management console
Add comment March 3, 2008
CCNA Exploration 4.0: Network Fundamentals – Chapter 2 Exam Answers
Which two layers of the OSI model have the same functions as the TCP/IP model Network Access Layer? (Choose two.)
Network
Transport
* Physical
Session
* supports error detection
ensures ordered arrival of data
provides delivery to correct destination
identifies the devices on the local network
assists intermediary devices with processing and path selection
No address is added.
The logical address is added.
* The physical address is added.
The process port number is added.
file server
IP phone
laptop
printer
* switch
physical
data link
*network
transport6Which statements correctly identify the role of intermediary devices in the network? (Choose three.)
* determine pathways for data
initiate data communications
* retime and retransmit data signals
originate the flow of data
* manage data flows
final termination point for data flow
7 What can be identified by examining the network layer header?
the destination device on the local media
* the path to use to reach the destination host
the bits that will be transferred over the media
the source application or process creating the data
8 What is the proper order of the layers of the OSI model from the highest layer to the lowest layer?
physical, network, application, data link, presentation, session, transport
application, physical, session, transport, network, data link, presentation
application, presentation, physical, session, data link, transport, network
* application, presentation, session, transport, network, data link, physical
presentation, data link, session, transport, network, physical, application
9 Refer to the exhibit. Which three labels correctly identify the network types for the network segments that are shown? (Choose three.)
Network A — WAN
* Network B — WAN
* Network C — LAN
Network B — MAN
Network C — WAN
* Network A — LAN
10 What are the key functions of encapsulation? (Choose three.)
allows modification of the original data before transmission
* identifies pieces of data as part of the same communication
enables consistent network paths for communication
* ensures that data pieces can be directed to the correct receiving end device
* enables the reassembly of complete messages
tracks delay between end devices
11 Refer to the exhibit. Which networking term describes the data interleaving process represented in the graphic?
piping
PDU
streaming
*multiplexing
encapsulation
12 What is a PDU?
corruption of a frame during transmission
data reassembled at the destination
retransmitted packets due to lost communication
* a layer specific encapsulation
13 Refer to the exhibit. “Cell A” at IP address 10.0.0.34 has established an IP session with “IP Phone 1″ at IP address 172.16.1.103. Based upon the graphic, which device type best describes the function of wireless device “Cell A?”
the destination device
* an end device
an intermediate device
a media device
14 Refer to the exhibit. Which set of devices contains only end devices?
A, C, D
B, E, G, H
C, D, G, H, I, J
D, E, F, H, I, J
* E, F, H, I, J
15 Refer to the exhibit. Which term correctly identifies the device type that is included in the green area?
source
end
transfer
* intermediary
16 Which three statements best describe a Local Area Network (LAN)? (Choose three.)
* A LAN is usually in a single geographical area.
* The network is administered by a single organization.
The connection between segments in the LAN is usually through a leased connection.
The security and access control of the network are controlled by a service provider.
* A LAN provides network services and access to applications for users within a common organization.
Each end of the network is generally connected to a Telecommunication Service Provider (TSP).
17 Refer to the exhibit. What type of network is shown?
WAN
MAN
* LAN
WLAN
18 What is the purpose of the TCP/IP Network Access layer?
path determination and packet switching
* data representation, encoding, and control
reliability, flow control, and error detection
detailing the components that make up the physical link and how to access it
the division of segments into packets
19 Which characteristic correctly refers to end devices in a network?
manage data flows
originate data flow
* retime and retransmit data signals
determine pathways for data
20 What is the primary purpose of Layer 4 port assignment?
to identify devices on the local media
to identify the hops between source and destination
to identify to the intermediary devices the best path through the network
to identify the source and destination end devices that are communicating
* to identify the processes or services that are communicating within the end devices
21 Select the statements that are correct concerning network protocols. (Choose three.)
* define the structure of layer specific PDU’s
dictate how to accomplish layer functions
* outline the functions necessary for communications between layers
limit hardware compatibility
* require layer dependent encapsulations
eliminate standardization among vendors
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