Computer Networking Quiz (or) Computer Networking MCQ (Multiple Choice Questions)

1 .

Which command is used to upgrade an IOS on a Cisco router?

A)

config net

B)

copy tftp run

C)

copy tftp flash

D)

copy tftp start

Correct Answer : Option (C) : copy tftp flash

Explanation : The copy tftp flash command places a new file in flash memory, which is the default location for the Cisco IOS in Cisco routers.

2 .

If you wanted to delete the configuration stored in NVRAM, what would you type?

A)

erase nvram

B)

delete nvram

C)

erase running

D)

erase startup

Correct Answer : Option (D) : erase startup

Explanation : The command erase startup-config deletes the configuration stored in NVRAM.

3 .

OSI stands for____

A)

open system interconnection

B)

open service Internet

C)

operating system interface

D)

optical service implementation

Correct Answer : Option (A) : open system interconnection

Explanation : OSI is the abbreviation for Open System Interconnection. OSI model provides a structured plan on how applications communicate over a network, which also helps us to have a structured plan for troubleshooting. It is recognized by the ISO as the generalized model for computer network i.e. it can be modified to design any kind of computer network.

4 .

TCP/IP model does not have ______ layer but OSI model have this layer.

A)

network layer

B)

session layer

C)

transport layer

D)

application layer

Correct Answer : Option (B) : session layer

Explanation : In OSI reference model, there are two layers which are not present in TCP/IP model. They are Presentation and Session layer. The functions of Presentation and Session layer in the OSI model are handled by the transport layer itself in TCP/IP.

5 .

Which address is used on the internet for employing the TCP/IP protocols?

A)

Port address

B)

Specific address

C)

Physical address and logical address

D)

All of the above

Correct Answer : Option (D) : All of the above

Explanation : The physical, logical, port and specific addresses are used in TCP/IP protocol. All the addressing schemes, that is physical (MAC) and logical address, port address and specific address are employed in both TCP/IP model and OSI model. In TCP/IP, the addresses are more focused on the internet implementation of these addresses.

6 .

TCP/IP model was developed _____ the OSI model.

A)

after

B)

prior to

C)

with no link to

D)

simultaneous to

Correct Answer : Option (B) : prior to

Explanation : Several TCP/IP prototypes were developed at multiple research centers between 1978 and 1983, whereas OSI reference model was developed in the year 1984. TCP/IP was developed with the intention to create a model for the Internet while OSI was intended to be a general network model.

7 .

Which of the following is the valid host range for the subnet on which the IP address 192.168.168.188 255.255.255.192 resides?

A)

192.168.168.128-190

B)

192.168.168.129-191

C)

192.168.168.129-190

D)

192.168.168.128-192

Correct Answer : Option (C) : 192.168.168.129-190

Explanation : 256 - 192 = 64. 64 + 64 = 128. 128 + 64 = 192. The subnet is 128, the broadcast address is 191, and the valid host range is the numbers in between, or 129-190.

8 .

To back up an IOS, what command will you use?

A)

copy flash tftp

B)

copy ios tftp

C)

copy tftp flash

D)

backup IOS disk

Correct Answer : Option (A) : copy flash tftp

Explanation : The command copy flash tftp will prompt you to back up an existing IOS in flash to a TFTP host.

9 .

Which protocol is used to send a destination network unknown message back to originating hosts?

A)

ARP

B)

TCP

C)

ICMP

D)

BootP

Correct Answer : Option (C) : ICMP

Explanation : ICMP is the protocol at the Network layer that is used to send messages back to an originating router.

10 .

Bluetooth is an example of _____

A)

local area network

B)

wide area network

C)

virtual private network

D)

personal area network

Correct Answer : Option (D) : personal area network

Explanation : Bluetooth is a wireless technology used to create a wireless personal area network for data transfer up to a distance of 10 meters. It operates on 2.45 GHz frequency band for transmission.