CCNA 1 Final Answers Updated 2012

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1.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

2.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

3.Which two functions of the OSI model occur at layer two? (Choose two.) 

physical addressing

encoding

routing

cabling

media access control

4.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.



5.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

6.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
 
7.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 clock rate command on interface Serial 0/0/0

issue the description command on interface Serial 0/0/1

issue the ip address command on interface FastEthernet 0/0

issue the no shutdown command on interface FastEthernet 0/1



8.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, J


9.When connectionless protocols are implemented at the lower layers of the OSI model, what is usually used to acknowledge that the data was received and to request the retransmission of missing data? 

IP

UDP

Ethernet

a connectionless acknowledgement

an upper-layer, connection-oriented protocol or service
 
10.Which OSI layer uses a connection-oriented protocol to ensure reliable delivery of data? 

application layer

presentation layer

session layer

transport layer

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CCNA 1 Chapter 11 V4.0 Answers Updated 2012

1.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

2.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

3.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.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

5.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 ip interface brief command on router C.

6.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

7.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

8.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

9.Refer to the exhibit. 

What additional command is required to allow remote access to this switch from hosts outside the local network?
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

10.In a Cisco device, where is the IOS file stored prior to system startup?
RAM
ROM
Flash
NVRAM
11.When network services fail, which port is most often used to access a router for management purposes?
AUX
Ethernet
Console
Telnet
SSH

12.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

13.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

14Refer 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

15.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

16.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

17.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

18.On a Cisco router, which interface would be used to make the initial configuration?

        Console Port

19.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.

Read more »

CCNA 1 Chapter 5 V4.0 Answers Updated 2012

1.Which portion of the network layer address does a router use to forward packets?
host portion
broadcast address
network portion
gateway address

2.What two characteristics are commonly associated with dynamic routing protocols? (Choose two.)
require no device configuration
provide routers with up-to-date routing tables
require less processing power than static routes require
consume bandwidth to exchange route information
prevent manual configuration and maintenance of the routing table

3.In an IPv4 environment, what information is used by the router to forward data packets from one interface of a router to another?
destination network address
source network address
source MAC address
well known port destination address

4.What type of routing uses information that is manually entered into the routing table?
dynamic
interior
static
standard

5.If the default gateway is configured incorrectly on the host, what is the impact on communications?
The host is unable to communicate on the local network.
The host can communicate with other hosts on the local network, but is unable to communicate with hosts on remote networks.
The host can communicate with other hosts on remote networks, but is unable to communicate with hosts on the local network.
There is no impact on communications.

6.What is a component of a routing table entry?
the MAC address of the interface of the router
the destination Layer 4 port number
the destination host address
the next-hop address

7.Refer to the exhibit. 

Using the network in the exhibit, what would be the default gateway address for host A in the 192.133.219.0 network?
192.135.250.1
192.31.7.1
192.133.219.0
192.133.219.1

8.What are three common problems with a large network? (Choose three.)
too few broadcasts
performance degradation
security issues
limited management responsibility
host identification
protocol compatibility

9.When the destination network is not listed in the routing table of a Cisco router, what are two possible actions that the router might take? (Choose two.)
The router sends an ARP request to determine the required next hop address.
The router discards the packet.
The router forwards the packet toward the next hop indicated in the ARP table.
The router forwards the packet to the interface indicated by the source address.
The router forwards the packet out the interface indicated by the default route entry.

10.Refer to the exhibit. 

The network in the exhibit is fully operational. What two statements correctly describe the routing for the topology that is shown? (Choose two.)
192.168.0.2 is the next-hop address that is used by R3 to route a packet from the 10.0.0.0 network to the 172.16.0.0 network.
10.0.0.1 is the next-hop address that is used by R1 to route a packet from the 192.168.12.0 network to the 10.0.0.0 network.
192.168.0.1 is the next-hop address that is used by R1 to route a packet from the 192.168.12.0 network to the 172.16.0.0 network.
172.16.0.1 is the next-hop address that is used by R3 to route a packet from the 10.0.0.0 to the 172.16.0.0 network.
192.168.0.1 is the next-hop address that is used by R2 to route a packet from the 172.16.0.0 network to the 192.168.12.0 network.
192.168.0.2 is the next-hop address that is used by R2 to route a packet from the 172.16.0.0 network to the 192.168.12.0 network.

11.Which intermediary devices could be used to implement security between networks? (Choose two.)
router
hub
switch
firewall
access point
bridge

12.What information is added during encapsulation at OSI Layer 3?
source and destination MAC
source and destination application protocol
source and destination port number
source and destination IP address

13.Refer to the exhibit. 

All devices shown in the exhibit have factory default settings. How many broadcast domains are represented in the topology that is shown?
3
4
5
7
8
11

14.What are the key factors to consider when grouping hosts into a common network? (Choose three.)
gateways
purpose
physical addressing
software version
geographic location
ownership

15.Refer to the exhibit.

A network administrator is troubleshooting a connectivity problem and needs to determine the address that is used to forward network packets out the network. Using the netstat -r command, the administrator would identify which address as the address to which all hosts send packets that are destined for an outside network?
10.10.10.26
127.0.0.1
10.10.10.6
10.10.10.1
224.0.0.0

16.What statement describes the purpose of a default route?
A host uses a default route to transfer data to another host on the same network segment.
A host uses a default route to forward data to the local switch as the next hop to all destinations.
A host uses a default route to identify the Layer 2 address of an end device on the local network.
A host uses a default route to transfer data to a host outside the local network when no other route to the destination exists.

17.Which IP packet field will prevent endless loops?
type-of-service
identification
flags
time-to-live
header checksum

18.What is the purpose of a default gateway?
physically connects a computer to a network
provides a permanent address to a computer
identifies the network to which a computer is connected
identifies the logical address of a networked computer and uniquely identifies it to the rest of the network
identifies the device that allows local network computers to communicate with devices on other networks

19.Which three statements are true about routes and their use? (Choose three.)
If no route to the destination network is found, the packet is returned to the previous router.
If the destination network is directly connected, the router forwards the packet to the destination host.
If multiple network entries exist for the destination network, the most general route is used to forward the packet.
If no route exists for the destination network and a default route is present, the packet is forwarded to the next-hop router.
If the originating host has a default gateway configured, the packet for a remote network can be forwarded using that route.
If a host does not have a route manually configured for the destination network, the host will drop the packet.

20.In a connectionless system, which of the following is correct?
The destination is contacted before a packet is sent.
The destination is not contacted before a packet is sent.
The destination sends an acknowledgement to the source that indicates the packet was received.
The destination sends an acknowledgement to the source that requests the next packet to be sent.
21.Refer to the exhibit.

A network administrator notices that there are too many broadcasts on the network. What two steps can the network administrator take to resolve this problem? (Choose two.)
Replace S2 with a router.
Place all servers on S1.
Disable TCP/IP broadcasts.
Subnet the 192.168.0.0 /24 network.
Disable all unused interfaces on the switches.

Read more »

CCNA 1 Chapter 10 V4.0 Answers Updated 2012

1.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


2.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

3.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

4.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

5.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


6.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


7.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

8.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

9.Refer to the exhibit. 

How many subnets are required to support the network that is shown?

2

3

4

5


10.What are two common methods for setting a UTP Ethernet port to MDI or MDIX operation? (Choose two.)

cable color code association

cable selection and configuration

use of cable testers to determine pinouts

the automatic detection and negotiating of MDI/MDIX operation of the port

the enabling of the mechanism to electrically swap the transmit and receive pairs


11.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

12.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


13.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

14.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?

hub

router

firewall appliance

wireless access point

15.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.

16.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.

17.Which device is used to create or divide broadcast domains?

hub

switch

bridge

router

repeater

18.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


19.What type of network cable is used between a terminal and a console port?

cross-over

straight-through

rollover

patch cable

20.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

21.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 is 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

22.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.

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

Read more »

CCNA 1 Chapter 9 V4.0 Answers Updated 2012

1.Convert the binary number 10111010 into its hexadecimal equivalent. Select the correct answer from the list below.

85

90

BA

A1

B3

1C


2.What does the IEEE 802.2 standard represent in Ethernet technologies?

MAC sublayer

Physical layer

Logical Link Control sublayer

Network layer


3.Ethernet operates at which layers of the OSI model? (Choose two.)

Network layer

Transport layer

Physical layer

Application layer

Session layer

Data-link layer


4.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


5.What three primary functions does data link layer encapsulation provide? (Choose three.)

addressing

error detection

frame delimiting

port identification

path determination

IP address resolution



6.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.



7.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


8.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.

9.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

10.Host A has an IP address of 172.16.225.93, a mask of 255.255.248.0, and a default gateway of 172.16.224.1. Host A needs to send a packet to a new host whose IP is 172.16.231.78. 
Host A performs the ANDing operation on its address and subnet mask. What two things will occur? (Choose two.)

Host A will get a result of 172.16.224.0 from the AND process.

Host A will send on to the media a broadcast frame that contains the packet.

Host A will broadcast an ARP request for the MAC of the host 172.16.231.78.

Host A will change the destination IP of the packet to 172.16.224.1 and forward the packet.

Host A will encapsulate the packet in a frame with a destination MAC that is the MAC address associated with 172.16.224.1.


11.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.


12.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


13.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

14.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.

15.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.

16.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

17.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.

18.Ethernet operates at which layer of the TCP/IP network model?

application

physical

transport

internet

data link

network access

19.Refer to the exhibit. 

Which option correctly identifies content that the frame data field may contain?

preamble and stop frame

network layer packet

physical addressing

FCS and SoF

20.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

Read more »

CCNA 1 Chapter 8 V4.0 Answers Updated 2012

1.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


2.When is a rollover cable used in a network?

for connecting a host to a Fast Ethernet port on a switch

for connecting a router to another router

for connecting two routers through their AUX ports

for connecting to a switch through its console port


3.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

4.What is a purpose of the physical layer in data communication?

to wrap data packets into frames

to make sure that MAC addresses are unique in each frame

to control the access sequence of frames to the transmission media

to convert a frame into a series of signals to be transmitted on the local media


5.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.

6.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.

7.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

8.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

9.Which data communications standard provides broadband access in a wireless network?

GSM

Wi-Fi

WiMAX

Bluetooth

10.Compared with UTP cable, what extra characteristic of STP cable helps reduce the effects of interference?

the metal braiding in the shielding

the reflective cladding around the core

the twisting of the wires in the cable

the insulating material in the outer jacket

11.Which type of cable run is most often associated with fiber-optic cable?

backbone cable

horizontal cable

patch cable

work area cable

12.Which connector is used with twisted-pair cabling in an Ethernet LAN?

13.A customer installs a wireless access point at home in the closet next to the kitchen.  The customer mentions that the wireless communication performance seems degraded when the cordless phone or the microwave oven is in use.  What is the possible reason for this degradation?

The access point is close to walls.

The cordless phone joins the WLAN and shares the available bandwidth.

The wireless signal is in the same radio frequency range as the household devices are in.

The access point is on the same electrical circuit as the phone base unit and microwave oven are.

The surge of electricity when a microwave oven is in use disrupts the operation of the access point.

14.What are three measures of data transfer? (Choose three.)

goodput

frequency

amplitude

throughput

crosstalk

bandwidth

15.Which fiber connector supports full duplex Ethernet?

16.Which OSI layer is responsible for managing optical signals used for data communication?

presentation

data link

transport

physical

17.Refer to the exhibit.

An ISP donates some decommissioned Cisco 2600 series routers to a local high school.  The high school plans to use these routers in their networking classrooms for students to practice. Which type of cable is used to make an Ethernet connection between routers RTA and RTB?

coax cable

rollover cable

crossover cable

straight-through cable

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CCNA 1 Chapter 7 V4.0 Answers Updated 2012

1.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

2.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

3.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.

4.What is the purpose of the preamble in an Ethernet frame?

is used as a padding for data

is used for timing synchronization

is used to identify the source address

is used to identify the destination address

5.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

6.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

7.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

8.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

9.What determines the method of media access control? (Choose two.)

network layer addressing

media sharing

application processes

logical topology

intermediary device function

10.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.

11.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

12.Refer to the exhibit. 

How many CRC calculations will take place as traffic routes from the PC to the laptop?

1

2

4

6

8

16

13.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

14.Which sublayer of the data link layer prepares a signal to be transmitted at the physical layer?

LLC

MAC

HDLC

NIC


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 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

17.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.

18.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

19.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.

20.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.

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