980+ Computer Networks Solved MCQs

These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Computer Science Engineering (CSE) , Electrical Engineering , Bachelor of Science in Computer Science TY (BSc CS) , Bachelor of Science in Information Technology FY (BSc IT) , Bachelor of Science in Information Technology SY (BSc IT) .

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1.	When collection of various computers seems a single coherent system to its client, then it is called
A.	computer network
B.	distributed system
C.	both (a) and (b)
D.	none of the mentioned
Answer» B. distributed system

2.	Two devices are in network if
A.	a process in one device is able to exchange information with a process in another device
B.	a process is running on both devices
C.	pids of the processes running of different devices are same
D.	none of the mentioned
Answer» A. a process in one device is able to exchange information with a process in another device

3.	Which one of the following computer network is built on the top of another network?
A.	prior network
B.	chief network
C.	prime network
D.	overlay network
Answer» D. overlay network

4.	In computer network nodes are
A.	the computer that originates the data
B.	the computer that routes the data
C.	the computer that terminates the data
D.	all of the mentioned
Answer» D. all of the mentioned

5.	Communication channel is shared by all the machines on the network in
A.	broadcast network
B.	unicast network
C.	multicast network
D.	none of the mentioned
Answer» A. broadcast network

6.	Bluetooth is an example of
A.	personal area network
B.	local area network
C.	virtual private network
D.	none of the mentioned
Answer» A. personal area network

7.	A _____ is a device that forwards packets between networks by processing the routing information included in the packet.
A.	bridge
B.	firewall
C.	router
D.	all of the mentioned
Answer» C. router

8.	A list of protocols used by a system, one protocol per layer, is called
A.	protocol architecture
B.	protocol stack
C.	protocol suit
D.	none of the mentioned
Answer» B. protocol stack

9.	Network congestion occurs
A.	in case of traffic overloading
B.	when a system terminates
C.	when connection between two nodes terminates
D.	none of the mentioned
Answer» A. in case of traffic overloading

10.	Which one of the following extends a private network across public networks?
A.	local area network
B.	virtual private network
C.	enterprise private network
D.	storage area network
Answer» B. virtual private network

11.	OSI stands for
A.	open system interconnection
B.	operating system interface
C.	optical service implementation
D.	none of the mentioned
Answer» A. open system interconnection

12.	The OSI model has ___ layers.
A.	4
B.	5
C.	6
D.	7
Answer» D. 7

13.	TCP/IP model does not have ______ layer but OSI model have this layer.
A.	session layer
B.	presentation layer
C.	application layer
D.	both (a) and (b)
Answer» D. both (a) and (b)

14.	Which layer links the network support layers and user support layers
A.	session layer
B.	data link layer
C.	transport layer
D.	network layer
Answer» C. transport layer

15.	Which address is used in an internet employing the TCP/IP protocols?
A.	physical address and logical address
B.	port address
C.	specific address
D.	all of the mentioned
Answer» D. all of the mentioned

16.	TCP/IP model was developed _____ the OSI model.
A.	prior to
B.	after
C.	simultaneous to
D.	none of the mentioned
Answer» A. prior to

17.	Which layer is responsible for process to process delivery?
A.	network layer
B.	transport layer
C.	session layer
D.	data link layer
Answer» B. transport layer

18.	Which address identifies a process on a host?
A.	physical address
B.	logical address
C.	port address
D.	specific address
Answer» C. port address

19.	Which layer provides the services to user?
A.	application layer
B.	session layer
C.	presentation layer
D.	none of the mentioned
Answer» A. application layer

20.	Transmission data rate is decided by
A.	network layer
B.	physical layer
C.	data link layer
D.	transport layer
Answer» B. physical layer

21.	Which transmission media has the highest transmission speed in a network?
A.	coaxial cable
B.	twisted pair cable
C.	optical fiber
D.	electrical cable
Answer» C. optical fiber

22.	Bits can be send over guided and unguided media as analog signal by
A.	digital modulation
B.	amplitude modulation
C.	frequency modulation
D.	phase modulation
Answer» A. digital modulation

23.	The portion of physical layer that interfaces with the media access control sublayer is called
A.	physical signalling sublayer
B.	physical data sublayer
C.	physical address sublayer
D.	none of the mentioned
Answer» A. physical signalling sublayer

24.	physical layer provides
A.	mechanical specifications of electrical connectors and cables
B.	electrical specification of transmission line signal level
C.	specification for ir over optical fiber
D.	all of the mentioned
Answer» D. all of the mentioned

25.	In asynchronous serial communication the physical layer provides
A.	start and stop signalling
B.	flow control
C.	both (a) and (b)
D.	none of the mentioned
Answer» C. both (a) and (b)

980+ Computer Networks Solved MCQs

When collection of various computers seems a single coherent system to its client, then it is called

Two devices are in network if

Which one of the following computer network is built on the top of another network?

In computer network nodes are

Communication channel is shared by all the machines on the network in

Bluetooth is an example of

A _____ is a device that forwards packets between networks by processing the routing information included in the packet.

A list of protocols used by a system, one protocol per layer, is called

Network congestion occurs

Which one of the following extends a private network across public networks?

OSI stands for

The OSI model has ___ layers.

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

Which layer links the network support layers and user support layers

Which address is used in an internet employing the TCP/IP protocols?

TCP/IP model was developed _____ the OSI model.

Which layer is responsible for process to process delivery?

Which address identifies a process on a host?

Which layer provides the services to user?

Transmission data rate is decided by

Which transmission media has the highest transmission speed in a network?

Bits can be send over guided and unguided media as analog signal by

The portion of physical layer that interfaces with the media access control sublayer is called

physical layer provides

In asynchronous serial communication the physical layer provides

The physical layer is responsible for

The physical layer translates logical communication requests from the ______ into hardware specific operations.

A single channel is shared by multiple signals by

Wireless transmission can be done via

The data link layer takes the packets from _____ and encapsulates them into frames for transmission.

Which one of the following task is not done by data link layer?

Which sublayer of the data link layer performs data link functions that depend upon the type of medium?

Header of a frame generally contains

Automatic repeat request error management mechanism is provided by

When 2 or more bits in a data unit has been changed during the transmission, the error is called

CRC stands for

Which one of the following is a data link protocol?

Which one of the following is the multiple access protocol for channel access control?

The technique of temporarily delaying outgoing outgoing acknowledgements so that they can be hooked onto the next outgoing data frame is called

The network layer concerns with

Which one of the following is not a function of network layer?

The 4 byte IP address consists of

In virtual circuit network each packet contains

Which one of the following routing algorithm can be used for network layer design?

Multidestination routing

A subset of a network that includes all the routers but contains no loops is called

Which one of the following algorithm is not used for congestion control?

The network layer protocol of internet is

ICMP is primarily used for

Transport layer aggregates data from different applications into a single stream before passing it to

26.	The physical layer is responsible for
A.	line coding
B.	channel coding
C.	modulation
D.	all of the mentioned
Answer» D. all of the mentioned

28.	A single channel is shared by multiple signals by
A.	analog modulation
B.	digital modulation
C.	multiplexing
D.	none of the mentioned
Answer» C. multiplexing

29.	Wireless transmission can be done via
A.	radio waves
B.	microwaves
C.	infrared
D.	all of the mentioned
Answer» D. all of the mentioned

31.	Which one of the following task is not done by data link layer?
A.	framing
B.	error control
C.	flow control
D.	channel coding
Answer» D. channel coding

32.	Which sublayer of the data link layer performs data link functions that depend upon the type of medium?
A.	logical link control sublayer
B.	media access control sublayer
C.	network interface control sublayer
D.	none of the mentioned
Answer» B. media access control sublayer

33.	Header of a frame generally contains
A.	synchronization bytes
B.	addresses
C.	frame identifier
D.	all of the mentioned
Answer» D. all of the mentioned

35.	When 2 or more bits in a data unit has been changed during the transmission, the error is called
A.	random error
B.	burst error
C.	inverted error
D.	none of the mentioned
Answer» B. burst error

36.	CRC stands for
A.	cyclic redundancy check
B.	code repeat check
C.	code redundancy check
D.	cyclic repeat check
Answer» A. cyclic redundancy check

37.	Which one of the following is a data link protocol?
A.	ethernet
B.	point to point protocol
C.	hdlc
D.	all of the mentioned
Answer» D. all of the mentioned

38.	Which one of the following is the multiple access protocol for channel access control?
A.	csma/cd
B.	csma/ca
C.	both (a) and (b)
D.	none of the mentioned
Answer» C. both (a) and (b)