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แนวข้อสอบ CCNA

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1. Which devices will create multiple collision domains in an Ethernet network? (Choose two.)

Switch

router

2. How many collision domains are shown in the diagram?

Seven

3. Refer to the exhibit. The physical documentation shows a portion of the internetwork of the ABC Company. Which segments will be free of collisions?

segments 3, 4, and 5
4. Refer to the exhibit. Which diagram represents the network topology that an administrator would prefer, and why would the administrator prefer it?

Diagram A. It will better provide available bandwidth to the hosts.
5. After an unsuccessful ping to the local router, the technician decides to investigate the router. The technician observes that the lights and fan on the router are not operational. In which layer of the OSI model is the problem most likely occurring?

Physical
6. Refer to the exhibit. How many broadcast domains are shown?

Three

7. Refer to the exhibit. A network associate needs to establish an Ethernet connection between Host A and Host B. However, the distance between the two hosts is further than the cabling standards allow. Which two devices that operate at the physical layer of the OSI can be used to allow Host A and Host B to communicate? (Choose two.)

hub

repeater

8. Refer to the exhibit. What must be configured on Host B to allow it to communicate with the file server? (Choose three.)

a unique host IP address

the subnet mask for the LAN

the default gateway address
9. Refer to the exhibit. Host A pings Host B. What can be concluded about the source and destination addresses contained in the communication sent by Router R5 when it forwards the ping out the Ethernet interface to Host B? (Choose two.)
source MAC address: 5555.AAAA.6666

destination IP address: 192.168.10.134
10. What is the correct number of usable subnetworks and hosts for the IP network address 192.168.35.0 subnetted with a /28 mask?

14 networks / 14 hosts

11. Refer to the exhibit. The network administrator wants to create a subnet for the point-to-point connection between the two routers. Which subnetwork mask would provide enough addresses for the point-to-point link with the least number of wasted addresses?
255.255.255.252
12. 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: 192.168.100.20; Subnet Mask: 255.255.255.240; Default Gateway: 192.168.100.17

13. Two peer hosts are exchanging data using TFTP. During the current session, a datagram fails to arrive at the destination. Which statement is true regarding the retransmission of the datagram?

Datagram retransmission is controlled by the application.

14. Which protocols are TCP/IP application layer protocols? (Choose two.)

TFTP

DNS

15. When using Category 5 UTP cable, which RJ-45 pin pairs are used to exchange data between hosts on an Ethernet network?

1 and 2; 3 and 6

16. In the exhibit, the connections between the devices are labeled A, B, C, D, and E. For each connection, what is the correct UTP cable to use?

A=rollover, B=straight, C=straight, D=crossover, E=crossover

17. Which cable diagram displays the end to end pinout for a crossover cable used with Cisco devices?

Cable C

18. Which subnet masks could be used when subnetting a Class B IP address? (Choose two.)

255.255.255.240

255.255.192.0

19. Which physical network topology is easy to monitor and troubleshoot, easy to add new devices to as the network expands, but subject to complete failure when a central hub or switch ceases to work?

Star

20. A computer technician is asked to make a network cable. One end of the cable is pinned as a 568A and the other as a 568B. For what purposes can this cable be used? (Choose two.)

to connect a switch to a switch

to connect a hub to a switch

21. Refer to the exhibit. Workstation 1 pings the Fa0/1 interface of Router 1. Which MAC address will workstation 1 obtain during the ARP request for this communication?

00-08-A3-B6-CE-02

22. Refer to the exhibit. A network administrator has configured a network after subnetting the network number 192.168.0.0/28. Workstation 1 is not able to communicate with Workstation 2. What is the cause of this loss in communications?

Workstation 1 is not on the same network that the Router 1 LAN interface is on.

23. Which network device creates the highest amount of latency?

Router

24. An Ethernet host receives a frame, calculates the FCS, and compares the calculated FCS to the FCS received in the frame. The host finds that the two FCS values do not match. What action will be taken by the host?

The host discards the frame.

25. A user initiates three simultaneous FTP connections from the local host to the same FTP server. Which OSI layer is responsible for establishing and managing these different FTP connections?

Session
26. A network administrator has installed a 24 port switch and connected 10 computers with 10/100 NICs. If the NICs are operating at 100 Mbps, how much bandwidth is available for each computer to receive data?

100 Mbps
27. Based on the graphic above, which of the following occurs as each host system comes on line in the topology?

The switch adds MAC address to the bridge table as each host sends a frame.
28. Consider the networks shown in the exhibit. Host A is sending packets to host B. Which layer of the OSI model is being used when the router is making the calculated decision to determine which interface to send the packet out?

Network

29. Why would a company install a switch instead of a hub when building or expanding a corporate network?

A switch provides more bandwidth by sending frames only out the port to which the destination device is attached. A hub sends the frame out all ports except the source port.

30. Refer to the exhibit. The hub and the switch are operating using factory default settings. Which hosts will receive the frame if host A transmits a broadcast frame?

Workstations B, C, D, E, and the router will receive the data.

31. Refer to the exhibit. What kind of Ethernet cable is represented?

straight-through cable

32. The ping command can be used to test connectivity between hosts. Which OSI model layers are verified by this test?

Layers 1, 2 and 3

33. A technician is testing connectivity between the devices using the ping command. Pings between Host B and Host A were successful. The technician could not ping the R3 address 172.16.3.2 from Host A. The technician issued ipconfig from Host A and saw the information displayed in the exhibit. What is the most likely problem?
The default gateway of Host A is incorrect.

34. Why do vendors utilize the OSI model when designing networking products?

It ensures greater compatibility and interoperability with equipment from different vendors.

35. A router determines the path to deliver a packet. What layer of the OSI model does this fact represent?

Network

36. How does a switch learn the addresses of hosts connected to its ports?

The switch reads the source MAC address on incoming frames and records it in CAM.

37. Refer to the exhibit. The connections in the exhibit are labeled A through E. Which of these indicate LAN links? (Choose two.)

link A

link E

38. A large company has a network that is constantly changing. The routing tables in the routers need to be adjusted to reflect the changes in the routing paths. What type of routing would the network administrator implement?

dynamic routing protocols

39. A network administrator has added a new switch to the network. The new switch connects to an existing switch that is already installed. Which UTP cable correctly connects the new switch to the existing switch?

crossover

40. Refer to the exhibit. A newly hired technician has a task of terminating CAT 5 UTP cables. The network administrator visually examined the cables the technician terminated. Some of the cables have connectors as shown in the exhibit. What should the network administrator explain to the technician about the cables?

The cable in Graphic A will produce more crosstalk.

41. Refer to the exhibit. What is the order of the TCP/IP Protocol Data Units as data is moved as indicated through the OSI model?

bits, frames, packets, segments, data

42. Refer to the exhibit. Which type of UTP cable should be used to connect Host A to Switch1?

straight-through

43. Which technologies are considered to be LAN technologies? (Choose two.)

Token Ring
Ethernet

44. Refer to the topology in the graphic. Which characteristic does this type of topology possess?

Communication continues in the event of a break in any one connection.

45. Which characteristics are common to both UDP and TCP? (Choose two.)

uses port numbers

classified as a transport layer protocol

46. 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?

172.16.192.160

47. Which type of address is 192.168.170.112/28?
subnetwork address

48. What is the decimal representation of the binary number 11111000?

248

49. What are important characteristics to consider when purchasing a network interface card? (Choose two.)

media used on the network system
bus used on the computer

50. Which of the following statements are correct about CSMA/CD? (Choose three.)

It is a media access method used in LANs.
When a device needs to transmit, it checks to see if the media is available.

Only one device can successfully transmit at a time.

1. A PC can not connect to any remote websites, ping its default gateway, or ping a printer that is functioning properly on the local network segment. Which action will verify that the TCP/IP stack is functioning correctly on this PC?
–> Use the ping 127.0.0.1 command at the command prompt.

2. Refer to the exhibit. Which set of devices contains only intermediary devices?
–> A, B, D, G

3. Refer to the exhibit. When computer A sends a frame to computer D, what computers receive the frame?
–> only computer D

4. Which password is automatically encrypted when it is created?
–> enable secret

5. Which three statements characterize the transport layer protocols? (Choose three.)
–> TCP and UDP port numbers are used by application layer protocols.
–> 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.)
–> 100 Base-FX
–> 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?
–> 192.168.254.1

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.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

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 no shutdown command on interface FastEthernet 0/1

11. Which three IPv4 addresses represent a broadcast for a subnet? (Choose three.)
–> 172.16.4.63 /26
–> 172.16.4.191 /26
–> 172.16.4.95 /27

12. What are three characteristics of CSMA/CD? (Choose three.)
–> A device listens and waits until the media is not busy before transmitting.
–> 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?
–> NVRAM

14. A routing issue has occurred in you internetwork. Which of the following type of devices should be examined to isolate this error?
–> router

15. Which OSI layer protocol does IP rely on to determine whether packets have been lost and to request retransmission?
–> 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.)
–> 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#

18. Which combination of network id and subnet mask correctly identifies all IP addresses from 172.16.128.0 through 172.16.159.255?
–> 172.16.128.0 255.255.224.0

19. When must a router serial interface be configured with the clock rate command?
–> 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?
–> upper-layer connection-oriented 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?
–> enable secret
22. Refer to the exhibit. What is required on host A for a network technician to create the initial configuration on RouterA?
–> a terminal emulation program
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 connection type is called a VTY session.
–> 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

25. Refer to the exhibit. What two facts can be determined about the exhibited topology? (Choose two.)
–> A single broadcast domain is present
–> 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: 192.168.100.20; Subnet Mask: 255.255.255.240; Default Gateway: 192.168.100.17

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
–> segment3
–> segment4

28. What is true regarding network layer addressing? (Choose three.)
–> uses a flat structure
–> uniquely identifies each host
–> 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 forwarded to the destination host.

30. Refer to the exhibit. Which two statements describe the information that is represented in the header? (Choose two.)
–> The destination port indicates a Telnet session.
–> The return segment will contain a source port of 23.

31. Refer to the exhibit. What is the correct destination socket number for a web page request from Host A to the web server?
–> 198.133.219.25:80
http://www.cisco.com

32. During the encapsulation process, which identifiers are added at the transport layer?
–> two applications communicating the data

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 suitable for use as a Fast 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?
–> 3

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?
–> 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 – straight-through cable , Connection 2 – crossover cable , Connection 3 – straight-through cable

37. Refer to the exhibit. What does the IP address 192.168.33.2 represent?
–> The host’s primary domain name server.

38. Refer to the exhibit. What two facts can be determined from the information that is given? (Choose two.)
–> The destination port indicates that an HTTP session has been initiated.
–> The data listed is associated with the transport layer.

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
–> 172.16.0.0 to 172.31.255.255
–> 192.168.0.0 to 192.168.255.255

40. Which two functions of the OSI model occur at layer two? (Choose two.)
–> physical addressing
–> 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 1023

42. As network administrator, what is the subnet mask that allows 510 hosts given the IP address 172.30.0.0?
–> 255.255.254.0

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?
–> Athens

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: EEEE:EEEE:EEEE Destination IP: 172.22.0.75

45. Refer to the exhibit. Which logical topology best describes the exhibited network?
–> star
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?
–> subnet mask incorrectly entered

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.)
–> 192.168.18.49
–> 192.168.18.52
–>192.168.18.59

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 prefix of the computer address is /27.

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 Dallas

50. Which of the following OSI layers offers reliable, connection-oriented data communication services?

–> transport

CCNA 1 – Final Exam Answers

admin — Sun, 29 Jun 2008 10:47:10 +0000

CCNA 1 – Final Exam Answers

ลองเฉลยด้วยตัวเองดูก่อนนะครับ เห็นอันนี้ ความถูกต้องอยู่ที่ 95%

ประกาศจากคณะกรรมการ MSIT04

admin — Thu, 26 Jun 2008 16:06:29 +0000

สวัสดีค่ะ…

           ขอเรียนเชิญ MSIT04 ทุกๆท่าน เข้าร่วมประชุมกันอย่างพร้อมเพียงกัน

           ในวัน อาทิตย์ ที่ 29 มิถุนายน 2551 ณ. ห้อง D802

           หลังเลิกเรียนของอ.พนม…..นะค่ะ

ป.ล ขอความร่วมมือในการประชุมครั้งนี้ด้วยนะค่ะ…..

                                          ขอบคุณค่ะ

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นำข่าวมาประกาศต่อ โดย..Admin ครับ

รายชื่อคณะกรรมการ MSIT04 (Click)

admin — Mon, 16 Jun 2008 18:15:15 +0000

รายชื่อคณะกรรมการ MSIT04

CCNA 1 – Module 11 Exam Answers

admin — Mon, 16 Jun 2008 17:39:07 +0000

CHAPTER 11

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 0/1

2
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-configuration

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?
enable password class
line console 0
password ccna
enable secret cisco
enable password class
line console 0
password ccna
enable secret 5 $1$v0/3$QyQWmJyT7zCa/yaBRasJm0
enable password class
line console 0
password ccna
enable secret cisco
enable password 7 14141E0A1F17
line console 0
password 7 020507550A
**enable secret 5 $1$v0/3$QyQWmJyT7zCa/yaBRasJm0
enable password 7 14141E0A1F17
line console 0
password 7 020507550A

4
When network services fail, which port is most often used to access a router for management purposes?
AUX
Ethernet
**Console
Telnet
SSH

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)# enable secret class
RouterB(config)# line vty 0 4
RouterB(config-if)# login
RouterB(config)# enable secret class
RouterB(config)# line vty 0 2
RouterB(config-vty)# password cisco
RouterB(config-vty)# login
**RouterB(config)# enable secret class
RouterB(config)# line vty 0
RouterB(config-line)# password cisco
RouterB(config-line)# login
RouterB(config)# enable secret class
RouterB(config)# line aux 0
RouterB(config-line)# password cisco
RouterB(config-line)# login
RouterB(config)# enable secret class
RouterB(config)# line aux 0
RouterB(config-vty)# password cisco
RouterB(config-vty)# login

6
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 memory

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 mode

8
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

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

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

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

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

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

CCNA 1 – Module 10 Exam Answers

admin — Mon, 16 Jun 2008 17:37:31 +0000

CHAPTER 10

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 speeds

2
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.

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 point

4
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

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.
xFive 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

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

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

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

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

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
xlimited susceptibility to EMI/RFI
durable connections
xgreater bandwidth potential
easily terminated

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
**rollover
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

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

CCNA 1 – Module 9 Exam Answers

admin — Mon, 16 Jun 2008 17:34:57 +0000

CHAPTER 9

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.

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

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.

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

CCNA 1 – Module 8 Exam Answers

admin — Mon, 16 Jun 2008 17:28:33 +0000

CHAPTER 8

1
Which type of cable run is most often associated with fiber-optic cable?
Xbackbone cable
horizontal cable
patch cable
work area cable

2
In most business LANs, which connector is used with twisted-pair networking cable?
BNC
RJ-11
**RJ-45
Type F

3
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 router

4
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

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?
kolmas

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

CCNA 1 – Module 7 Exam Answers

admin — Mon, 16 Jun 2008 17:27:12 +0000

CHAPTER 7

1
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 passing

2
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 associated

Refer to the exhibit. How many unique CRC calculations will take place as traffic routes from the PC to the laptop?
1
**2
4
8

4
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.

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-af

6
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.

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

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.