2010 m. balandis 27 d., antradienis

ENetwork 1 Final Exam

100%

1

A network administrator is asked to design a new addressing scheme for a corporate network. There are 60 users in the main office, 40 users in the branch office, 28 users in manufacturing, 12 in the sales office, and 4 users in the research office. Which VLSM addressing scheme that uses the 192.168.88.0/24 network will fulfill the requirements while wasting the fewest addresses?

192.168.88.0/26 main
192.168.88.32/26 branch
192.168.88.64/26 manufacturing
192.168.88.96/27 sales
192.168.88.128/28 research

192.168.88.0/26 main
192.168.88.64/26 branch
192.168.88.128/27 manufacturing
192.168.88.160/28 sales
192.168.88.176/29 research

192.168.88.0/27 main
192.168.88.32/27 branch
192.168.88.64/28 manufacturing
192.168.88.80/29 sales
192.168.88.88/30 research

192.168.88.0/27 main
192.168.88.64/28 branch
192.168.88.80/28 manufacturing
192.168.88.96/29 sales
192.168.88.104/30 research

2

Which application belongs to the category of the client/server model?

using Telnet to access a router

exchanging information via instant messaging

printing a document to a locally connected printer

scanning a document with a directly connected scanner

3

Which two types of media can provide bandwidth up to 1 Gb/s? (Choose two.)

10 BASE-T

100 BASE-T

100 BASE-FX

1000 BASE-TX

1000 BASE-SX

4

An administrator has made changes to a device. The changes did not have the desired effect. What can the administrator do to restore the configuration saved in NVRAM?

Issue the erase flash command.

Issue the reload command and respond no to the prompt that follows.

Issue the erase start-up config command.

Issue the copy running-config start-up config command.

5

Which option shows how a router will route packets to a remote network?



Description: shipintbr2



Description: 146359_21



Description: 146359_22



Description: shiproute1

6

Which configuration mode is used to set a password to authenticate users that are accessing and configuring the network device using a Telnet connection?

VTY line mode

interface mode

console line mode

global configuration mode

7

To send data through a network, what two flags are used to establish a session? (Choose two.)

ACK

CRC

SYN

Ack #

Port #

Seq #

8

Which service is used when the nslookup command is issued on a computer?

FTP

DNS

DHCP

Telnet

9



Description: 18250
Refer to the exhibit. Which list refers only to end devices?

D,E,F,G

A,H,B,C

A,D,E,F

A,D,E,G

10

Which topology divides the collision domain and provides full media bandwidth to the hosts in the network?



Description: 146409-a



Description: 146409-b



Description: 146409-c



Description: 2

11

During the encapsulation process, what identifiers are added at the transport layer?

source and destination IP addresses

source and destination MAC addresses

source and destination port numbers

source and destination channel identifiers

12



Description: 18220
Refer to the exhibit. The diagram represents the process of sending e-mail between clients. Which list 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.MUA 2.SMTP 3.MTA 4.SMTP 5.MTA 6.MDA 7.POP 8.MUA

13



Description: 18273
Refer to the exhibit. While configuring a network, a technician wired each end of a Category 5e cable as shown. Which two statements are true about this setup? (Choose two.)

The cable is suitable for connecting a switch to a router Ethernet port.

The cable is suitable for connecting dissimilar types of devices.

The cable is unusable and must be rewired.

The cable is terminated in a way that the transmit pin is wired to the receive pin.

The cable simulates a point-to-point WAN link.

14

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

15



Description: 29875
Refer to the exhibit. Which two layers of the OSI model describe the same functions as the transport and internet layers of the TCP/IP model? (Choose two.)

application layer

presentation layer

session layer

transport layer

network layer

data link layer

physical layer

16

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

17

Which statement is true about the CSMA/CD access method that is used in Ethernet?

When a device hears a carrier signal and transmits, a collision cannot occur.

A jamming signal causes only devices that caused the collision to execute a backoff algorithm.

All network devices must listen before transmitting.

Devices involved in a collision get priority to transmit after the backoff period.

18

What happens when a node on an Ethernet network is creating a frame and it does not have the destination MAC address?

The node drops the frame.

The node sends out a Layer 3 broadcast message.

The node sends a message directly to the router for the address.

The node sends out an ARP request with the destination IP address.

19



Description: 22190
Refer to the exhibit. Communication for hosts X and Y is restricted to the local network. What is the reason for this?

Host X is assigned a network address.

Host Y is assigned a multicast address.

Host X and host Y belong to different networks.

The gateway addresses are broadcast addresses.

20

Which statement is true about the ICMP protocol?

It is an application layer protocol.

It is designed to make IP a reliable protocol.

It is often filtered out of networks for security purposes.

If a host does not respond to an ICMP echo request, the host is not functioning.

21



Description: 18227
Refer to the exhibit. A host is connected to hub 1. Which combination of IP address, subnet mask, and default gateway can allow this host to function in the network?

IP address: 172.16.31.36 Subnet mask: 255.255.255.240 Default gateway: 172.16.31.35

IP address: 172.16.31.63 Subnet mask: 255.255.255.224 Default gateway: 172.16.31.35

IP address: 172.16.31.29 Subnet mask: 255.255.255.248 Default gateway: 172.16.31.35

IP address: 172.16.31.32 Subnet mask: 255.255.255.224 Default gateway: 172.16.31.35

IP address: 172.16.31.29 Subnet mask: 255.255.255.240 Default gateway: 172.16.30.1

IP address: 172.16.31.37 Subnet mask: 255.255.255.224 Default gateway: 172.16.31.35

22



Description: 18280
Refer to the exhibit. RouterB is configured properly. The Ethernet interface Fa0/0 of RouterA is configured with the use of the commands that are shown. However, a ping from the Fa0/0 interface of RouterA to the Fa0/0 interface of RouterB is unsuccessful. What action should be taken on RouterA to solve this problem?

Use the description command on the FastEthernet interface Fa0/0.

Configure the clock rate of the FastEthernet interface Fa0/0.

Use the no shutdown command on the FastEthernet interface Fa0/0.

Reboot the router.

23



Description: 16447
Refer to the exhibit. The tracert command is initiated from PC1 to PC4. Which device will send a response to the initial tracert packet from PC1?

Athens

Ankara

London

Paris

PC4

24

Which physical component is used to access and perform the initial configuration on a new unconfigured router?



Description: Ethernet1



Description: ConsolePort2



Description: Firewire1



Description: Flash1



Description: Serial1

25

In a network design project, a network designer needs to select a device to provide collision free connections to 40 hosts on the LAN. Which device should be selected?

hub

router

switch

firewall

26



Description: 24986
Refer to the exhibit. Which option correctly identifies the network address, range of host addresses, and the broadcast address for the network that contains host A?



Description: 146440_option1



Description: 146440_option2



Description: 146440_option3



Description: 146440_option4

27



Description: 18257
Refer to the exhibit. A router, the table of which is shown, receives a packet that is destined for 192.168.9.4. How will the router treat the packet?

It will drop the packet.

It will forward the packet via FastEthernet 0/1.

It will forward the packet to the next hop address.

It will forward the packet to 172.16.2.0

28



Description: 35796
Refer to the exhibit. An administrator is trying to remotely modify the configuration of this switch by using Telnet. The management workstation is on the same subnet as the switch, but the administrator is unable to access the switch from the workstation. Based on the output that is provided, what is the problem?

There is no IP address on Fa0/1 interface.

The enable password has not been configured.

No password has been set on the console line.

Telnet access has been removed from the VTY lines.

29



Description: 22555
Refer to the exhibit. Host A is requesting a web page from the web server. Which option represents the socket to which the request is made?

80

www.cisco.com

10.0.0.130

10.0.0.130:80

30



Description: 15761
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

31

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

32

Which device should be used for enabling a host to communicate with another host on a different network?

switch

hub

router

host

33

To enhance security in a network, the network administrator uses these commands:

Router(config)# line console 0
Router(config-line)# password j1mdi2
Router(config-line)# login

What two conclusions are evident from these commands? (Choose two.)

Users who attempt to connect to the console port of the router must enter a password.

The entries permit access through the console by the use of j1mdi2 as the password.

The entries eliminate the need for authentication.

Access through the console will be denied because the console configuration is incomplete.

The entries prevent passwords from being displayed as plain text.

34

What happens when a host station receives a frame that contains its own MAC address in the destination field?

The Layer 2 information is removed and the frame is pushed up to Layer 3.

The host station will copy the information to its buffers and send it back out.

The frame originated from the host and will be ignored.

The Layer 3 information is added to the frame.

35



Description: 18271
Refer to the exhibit. All devices in the network use default configurations. How many broadcast domains are there in this topology?

3

5

7

9

11

36

What information can be gathered by using the command netstat?

the default gateway

the routing protocol

active TCP connections

the locally configured subnet mask

37



Description: 18216
Refer to the exhibit. A PC is connected to a network. Which action will verify that the PC can communicate with its default gateway?

Use the ping 127.0.0.1 command.

Use the ipconfig command.

Use the ipconfig/all command.

Use the ping 10.0.0.254 command.

38



Description: 16475
Refer to the exhibit. A network administrator remotely accesses the CLI of RouterB from PC1 using Telnet. Which statement is true about this connection?

The data is automatically encrypted.

A Telnet server process is running on PC1.

The connection is made through a VTY session on the router.

A GET request was sent to RouterB to retrieve data during this session.

39



Description: 18222
Refer to the exhibit. Host C is able to ping 127.0.0.1 successfully, but is unable to communicate with hosts A and B in the organization. What is the likely cause of the problem?

Hosts A and B are not on the same subnet as host C.

The IP addresses on the router serial interfaces are wrong.

The subnet mask on host C is improperly configured.

The FastEthernet interface fa0/0 of router 1 is wrongly configured.

40

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)#

41

How can ARP be used to help document the network?

It can list each hop on the way to a destination host.

It can show the average latency of hosts on the network.

It can provide a list of physical addresses on the network.

It can indicate which hosts are not responding to network traffic.

42

What information is contained in the header of Layer 3 to help data delivery?

port number

device physical address

destination host logical address

virtual connection identifier

43

Which router component will have contents erased when the command erase startup-config is issued?

flash

RAM

ROM

NVRAM

44



Description: 16168
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 computers

45

Which option correctly identifies the interface or interfaces used to connect the router to a CSU/DSU for WAN connectivity?



Description: 146395-A



Description: 146395-B



Description: 146395-C



Description: 146395-d

46



Description: 21760
Refer to the exhibit. A user wants to access the Internet from the PC. A part of the running configuration of the router is shown. Which default gateway IP address should be configured at the PC to enable this access?

10.1.192.1

10.1.192.2

10.1.192.54

192.31.7.1

47



Description: 22418
Refer to the exhibit. Which Layer 2 protocol could be used inside nework A and network C?

IP

TCP

UDP

Ethernet

48

Which password is automatically encrypted when it is created?

vty

aux

console

enable secret

enable password

49

Two routers are connected via their serial ports in a lab environment. The routers are configured with valid IP addresses, but they cannot ping each other. The show interface serial0/0 command shows that the serial0/0 interface is up but the line protocol is down. What could be the cause of this problem?

The no shutdown command has not been applied to the interfaces.

The clock rate command has not been entered on the DCE interface.

The interface timers are not cleared.

The FastEthernet interface is emulating a serial interface by assigning it a timing signal.

50

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

51

A user sees the command prompt: Router(config-if)# . What task can be performed at this mode?

Reload the device.

Perform basic tests.

Configure individual interfaces.

Configure individual terminal lines.

52

Which TCP/IP model layer creates additional overhead on network resources due to acknowledgments, tracking, and retransmission of data?

internet

transport

application

network access