IT6201 Data Communications and Networking 1 ( Final Exam )

IT6201 Data Communications and Networking 1 ( Final Exam )

This course covers configuring and implementation of LAN networks.

Question 1

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During the boot process, in what memory location will the router bootstrap program look for the IOS image if a TFTP server is not used?

Select one:

a.

RAM

b.

NVRAM

c.

flash

d.

ROM

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Question 2

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What is the purpose of using a source port number in a TCP communication?

Select one:

a.

to inquire for a non received segment

b.

to keep track of multiple conversations between devices

c.

to notify the remote device that the conversation is over

d.

to assemble the segments that arrived out of order

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Question 3

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Which feature on a Cisco router permits the forwarding of traffic for which there is no specific route?

Select one:

a.

gateway of last resort

b.

next-hop

c.

outgoing interface

d.

route source

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Question 4

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Which value, that is contained in an IPv4 header field, is decremented by each router that receives a packet?

Select one:

a.

Fragment Offset

b.

Time-to-Live

c.

Header Length

d.

Differentiated Services

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Question 5

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How does the network layer use the MTU value?

Select one:

a.

To increase speed of delivery. The network layer ignores the MTU

b.

The network layer depends on the data link layer to set the MTU, and adjusts the speed of transmission to accommodate it

c.

The network layer depends on the higher level layers to determine the MTU

d.

The MTU is passed to the network layer by the data link layer

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Question 6

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Which feature on a Cisco router permits the forwarding of traffic for which there is no specific route?

Select one:

a.

outgoing interface

b.

route source

c.

gateway of last resort

d.

next-hop

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Question 7

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Which statement is true about an interface that is configured with the IPv6 address command?

Select one:

a.

- A link-local IPv6 address is automatically

b.

Any IPv4 addresses that are assigned to the interface are replaced with an IPv6 address

c.

A global unicast IPv6 address is dynamically configured on the interface

d.

IPv6 traffic-forwarding is enable on the interface

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Question 8

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The shortest compressed format of the IPv6 address 2001: 0DB8:0000:1470:0000:0000:0000:0200 is Answer

2001:DB8:0:1470::200

Question 9

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Which three fields are used in a UDP segment header? (Choose three.)

Select one or more:

a.

Sequence Number

b.

Length

c.

Windows Size

d.

Source Port

e.

Checksum

f.

Acknowledgement Number

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Question 10

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Which two files are loaded into RAM by the router when it boots? (Choose two.)

Select one or more:

a.

startup configuration

b.

running configuration

c.

bootsrap program

d.

IOS image

e.

POST

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Question 11

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During troubleshooting procedures, from which location will most Cisco routers load a limited IOS

Select one:

a.

ROM

b.

flash

c.

NVRAM

d.

RAM

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Question 12

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Which statement accurately describes public IP addresses?

Select one:

a.

Public addresses can be duplicated only within a local network

b.

Network administrators are free to select any public addresses to use for network devices that access the Internet

c.

Public IP addresses must be unique across the entire Internet

d.

Public addresses cannot be used within a private network

e.

Public IP addresses are only required to be unique within the local network

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Question 13

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What are two functions that are provided by the network layer? (Choose two.)

Select one or more:

a.

directing data packets to destination hosts on other networks

b.

carrying data between processes that are running on source and destination hosts

c.

providing end devices with a unique network identifier

d.

placing data on the network medium

e.

providing dedicated end-to-end connections

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Question 14

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A collision fragment, also known as a Answer frame, is a frame of fewer than 64 bytes in length.

Question 15

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A network administrator notices that the default gateway devices sends an ICMP Redirect message to the workstation when the workstation tries to connect to file server on another network. What is the purpose for this ICMP message?

Select one:

a.

The network topology has changed and a new route toward the file server is available

b.

The default gateway is overwhelmed by network traffic and the request is redirected to another router

c.

To notify the workstation, that another router on the same network, is the better default-gateway to reach the remote server

d.

The default gateway does not know a route to the destination

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Question 16

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Which application use UDP as the transport layer protocol?

Select one:

a.

HTTP

b.

SMTP

c.

DNS queries

d.

Telnet

e.

DHCP

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Question 17

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What is an advantage of UDP over TCP?

Select one:

a.

UDP acknowledges received data

b.

UDP communication requires less overhead

c.

UDP communication is more reliable

d.

UDP reorders segments that are received out of order

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Question 18

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A user is unable to access the company server from a computer. On issuing the ipconfig command, the user finds that the IP address of the computer is displayed as 169.254.0.2. What type of address is this?

Select one:

a.

loopback

b.

experimental

c.

link-local

d.

private

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Question 19

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Which statement accurately describes public IP addresses?

Select one:

a.

Public IP addresses are only required to be unique within the local network

b.

Network administrators are free to select any public addresses to use for network devices that access the Internet

c.

Public addresses cannot be used within a private network

d.

Public IP addresses must be unique across the entire Internet

e.

Public addresses can be duplicated only within a local network

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Your answer is correct.

Question 20

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A collision fragment, also known as a Answer frame, is a frame of fewer than 64 bytes in length.

Question 21

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Which action is performed by a client when establishing communication with a server via the use of UDP at the transport layer?

Select one:

a.

The client sends a synchronization segment to begin the session

b.

The client sets the window size for the session

c.

The client randomly selects a source port number

d.

The client sends an ISN to the server to start the 3-way handshake

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Question 22

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What is the purpose of using a source port number in a TCP communication?

Select one:

a.

to notify the remote device that the conversation is over

b.

to inquire for a non received segment

c.

to assemble the segments that arrived out of order

d.

to keep track of multiple conversations between devices

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Question 23

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When a client connects to an HTTP server by the use of a randomly generated source port number, what destination port number will the HTTP server use when building a response?

Select one:

a.

the original source port number that was randomly generated by the client

b.

a destination port number of 80, referencing the service requested

c.

the original destination port number that was generated by the client

d.

a randomly generated destination port number

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Question 24

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Which entities are involve in a temporary communication that is established by the transport layer?

Select one:

a.

a host an intermediary device

b.

applications

c.

servers

d.

LANs

e.

network media

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Question 25

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Which statement is true about an interface that is configured with the IPv6 address command?

Select one:

a.

Any IPv4 addresses that are assigned to the interface are replaced with an IPv6 address

b.

A global unicast IPv6 address is dynamically configured on the interface

c.

A link-local IPv6 address is automatically

d.

IPv6 traffic-forwarding is enable on the interface

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Your answer is correct.

Question 26

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The shortest compressed format of the IPv6 address 2001: 0DB8:0000:1470:0000:0000:0000:0200 is Answer

2001:DB8:0:1470::200

Question 27

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Which number or set of numbers represents a socket?

Select one:

a.

21

b.

01-23-45-67-89-AB

c.

192.168.1.1:80

d.

10.1.1.15

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stion 28

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The last host address on the 10.15.25.0/24 network is Answer

Question 29

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A network administrator notices that the default gateway devices sends an ICMP Redirect message to the workstation when the workstation tries to connect to file server on another network. What is the purpose for this ICMP message?

Select one:

a.

The default gateway does not know a route to the destination

b.

The network topology has changed and a new route toward the file server is available

c.

The default gateway is overwhelmed by network traffic and the request is redirected to another router

d.

To notify the workstation, that another router on the same network, is the better default-gateway to reach the remote server

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Question 30

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Which destination address is used in an ARP request frame?

Select one:

a.

255.255.255.255

b.

AAAA.AAAA.AAAA

c.

the physical address of the destination host

d.

FFFF.FFFF.FFFF

e.

0.0.0.0

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Question 31

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Within a production network, what is the purpose of configuring a switch with a default gateway address?

Select one:

a.

The default gateway address is used to forward packets originating from the switch to remote networks.

b.

A switch mush have a default gateway to be accessible by Telnet and SSH

c.

It provides a next-hop address for all traffic that flows through the switch

d.

Hosts that are connected to the switch can use the switch default gateway address to forward packets to a remote destination

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Question 32

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The 8-bit binary value for 41 is Answer

Question 33

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The 8-bit binary value for 41 is Answer

Question 34

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Which two functions or operations are performed by the MAC sublayer? (Choose two.)

Select one or more:

a.

it adds a header and trailer to form an OSI Layer 2 PDU

b.

it adds control information to network protocol layer data

c.

it performs the function of NIC driver software

d.

It is responsible for Media Access Control

e.

it handles communication between upper and lower layers

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Question 35

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On Ethernet networks, the hexadecimal address FF-FF-FF-FF-FF-FF represent the Answer MAC address.

Question 36

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Which term defines the processing capabilities of a switch by rating how much data can be processed per second?

Select one:

a.

form factor

b.

forwarding rate

c.

port density

d.

switching rate

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Question 37

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What is the command netstat –r used for?

Select one:

a.

to release the assigned IP address

b.

to renew the default gateway

c.

to display the TCP sockets

d.

to display the host routing table

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Question 38

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Which two functions or operations are performed by the MAC sublayer? (Choose two.)

Select one or more:

a.

it adds control information to network protocol layer data

b.

it performs the function of NIC driver software

c.

it handles communication between upper and lower layers

d.

it adds a header and trailer to form an OSI Layer 2 PDU

e.

It is responsible for Media Access Control

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Your answer is correct.

Question 39

Correct

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Which number or set of numbers represents a socket?

Select one:

a.

21

b.

192.168.1.1:80

c.

10.1.1.15

d.

01-23-45-67-89-AB

Feedback

Your answer is correct.

Question 40

Correct

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Question text

Which term defines the processing capabilities of a switch by rating how much data can be processed per second?

Select one:

a.

port density

b.

switching rate

c.

forwarding rate

d.

form factor

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Your answer is correct.c

Question 41

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Which destination address is used in an ARP request frame?

Select one:

a.

FFFF.FFFF.FFFF

b.

0.0.0.0

c.

255.255.255.255

d.

AAAA.AAAA.AAAA

e.

the physical address of the destination host

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Question 42

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The last host address on the 10.15.25.0/24 network is Answer

Question 43

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A user is unable to access the company server from a computer. On issuing the ipconfig command, the user finds that the IP address of the computer is displayed as 169.254.0.2. What type of address is this?

Select one:

a.

link-local

b.

private

c.

experimental

d.

loopback

Feedback

Your answer is correct.

Question 44

Correct

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On Ethernet networks, the hexadecimal address FF-FF-FF-FF-FF-FF represent the Answer MAC address.

Question 45

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When transporting data from real-time applications, such as streaming audio and video, which field in the IPv6 header can be used to inform the routers and switches to maintain the same path for the packets in the same conversation?

Select one:

a.

Next Header

b.

Flow Label

c.

Traffic Class

d.

Differentiated Services

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Question 46

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How does the network layer use the MTU value?

Select one:

a.

The network layer depends on the higher level layers to determine the MTU

b.

To increase speed of delivery. The network layer ignores the MTU

c.

The network layer depends on the data link layer to set the MTU, and adjusts the speed of transmission to accommodate it

d.

The MTU is passed to the network layer by the data link layer

Feedback

Your answer is correct.

Question 47

Correct

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Which two files are loaded into RAM by the router when it boots? (Choose two.)

Select one or more:

a.

IOS image

b.

startup configuration

c.

POST

d.

running configuration

e.

bootsrap program

Feedback

Your answer is correct.

Question 48

Correct

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Which application use UDP as the transport layer protocol?

Select one:

a.

DHCP

b.

HTTP

c.

Telnet

d.

DNS queries

e.

SMTP

Feedback

Your answer is correct.

Question 49

Correct

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Question text

Within a production network, what is the purpose of configuring a switch with a default gateway address?

Select one:

a.

A switch mush have a default gateway to be accessible by Telnet and SSH

b.

It provides a next-hop address for all traffic that flows through the switch

c.

The default gateway address is used to forward packets originating from the switch to remote networks.

d.

Hosts that are connected to the switch can use the switch default gateway address to forward packets to a remote destination

Feedback

Your answer is correct.

Question 50

Correct

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During the boot process, in what memory location will the router bootstrap program look for the IOS image if a TFTP server is not used?

Select one:

a.

NVRAM

b.

flash

c.

RAM

d.

ROM

Feedback

Your answer is correct.