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Computer Networks

Total questions: 150

Worksheet time: 2hrs 43mins

Name
Class
Date
1.

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

a)

Network Layer

b)

Data Link Layer

c)

Application Layer

d)

Physical Layer

2.

Transmission control protocol ___________ .

a)

is a connection-oriented protocol

b)

uses a three way handshake to establish a connection

c)

receives data from application as a single stream

d)

all of the mentioned

3.

An endpoint of an inter-process communication flow across a computer network is called __________.

a)

Socket

b)

Pipe

c)

Port

d)

Machine

4.

Which one of the following is a version of UDP with congestion control?

a)

Data Congestion Control Protocol

b)

Steam Control Transmission Protocol

c)

Structured Stream Transport

d)

User Congestion Control Protocol

5.

Which network topology requires a central controller or hub?

a)

Mesh

b)

Ring

c)

Star

d)

Bus

6.

Data communication system within a building or campus is________

a)

WAN

b)

LAN

c)

MAN

d)

PAN

7.

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

a)

Framing

b)

Error Control

c)

Flow Control

d)

Channel Coding

8.

Automatic repeat request error management mechanism is provided by ________

a)

logical link control sublayer

b)

media access control sublayer

c)

network interface control sublayer

d)

application access control sublayer

9.

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

a)

CSMA/CD

b)

CSMA/CA

c)

Both CSMA/CD & CSMA/CA

d)

HDLC

10.

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

a)

network layer

b)

physical layer

c)

transport layer

d)

application layer

11.

The ____ translates internet domain and host names to IP address.

a)

routing information protocol

b)

domain name system

c)

network time protocol

d)

internet relay chat

12.

Application layer protocol defines:

a)

types of messages exchanged

b)

message format, syntax and semantics

c)

rules for when and how processes send and respond to messages

d)

all of the mentioned

13.

The protocol data unit(PDU) for the application layer in the Internet stack is?

a)

Segment

b)

Datagram

c)

Message

d)

Frame

14.

Which of the following is public IP address ?

a)

10.15.14.12

b)

192.168.52.62

c)

172.32.1.1

d)

None of the Above

15.

If subnet mask 255.255.255.224, which of the following will be Direct Broadcast address ?

a)

202.15.19.127

b)

202.15.19.63

c)

Both a and b

d)

None of the above

16.

In class C , if subnet mask is 255.255.255.224 then calculates number of subnet?

a)

6

b)

8

c)

4

d)

None of the above

17.

If Direct Broadcast Address of subnet is 201.15.16.31. Which of the following will be subnet mask ?

a)

255.255.255.240

b)

255.255.255.192

c)

255.255.255.198

d)

None Of the Above

18.

Transmission media are usually categorized as:

a)

Fixed or unfixed

b)

Guided or unguided

c)

Determinate or indeterminate

d)

Metallic or non-metallic

19.

Transmission media lie below

a)

Physical

b)

Application

c)

Data link

d)

Network

20.

Which of the following uses guided media?

a)

Cellular telephone system

b)

Radio broadcast

c)

Local telephone system

d)

Satellite system

21.

Protocol for Network virtual terminal is___________

a)

FTP

b)

HTTP

c)

Telnet

d)

SMTP

22.

Which two layers of OSI are merged in network access layer of TCP IP model?

a)

Application, Presentation

b)

Data link, Physical

c)

Network, Data link

d)

None

23.

Which one of them is not application layer protocol?

a)

TCP

b)

HTTP

c)

FTP

d)

SMTP

24.

Segmentation and reassembly is done at __________ layer

a)

Session

b)

Presentation

c)

Transport

d)

Data Link

25.

Framing is done at _________ layer

a)

Physical

b)

Transport

c)

Data Link

d)

None

26.

NAK is a _____________ acknowledgement

a)

Positive

b)

Negative

c)

Neutral

d)

None of the above

27.

The speed mismatch between the sender and receiver is called ______________

a)

Error control

b)

speed control

c)

Flow Control

d)

Transmission control

28.

Data in Computer Networks is sent in the form of

a)

Boxes

b)

Baskets

c)

Groups

d)

Packets

29.

The ___________ layer is the lowest layer in the OSI model

a)

Physical

b)

Transport

c)

Session

d)

Application

30.

The __________ layer is the top most layer in the OSI model

a)

Physical

b)

Transport

c)

Session

d)

Application

31.

The _________ layer is responsible for node to node delivery of packets

a)

Physical

b)

Transport

c)

Data Link

d)

Application

32.

The ________ layer is responsible for routing packets within or across the Network

a)

Physical

b)

Network

c)

Data Link

d)

Application

33.

Encryption is handled by the _________ layer

a)

Data Link

b)

Transport

c)

Session

d)

Presentation

34.

www is a ___________ layer protocol

a)

physical

b)

Application

c)

Data Link

d)

Session

35.

A set of rules that govern data communication between the sender and receiver is called

a)

Rule

b)

Protocol

c)

Law

d)

Option

36.

In Simplex communication, _________________

a)

only one party can transmit data at the same time

b)

Both parties can transmit data at the same time

c)

Both parties can transmit data but not at the same time

d)

No party can transmit data

37.

In half duplex communication_________________

a)

only one party can transmit data

b)

Both Parties can transmit data but not at the same time

c)

Both parties can transmit the data at the same time

d)

No party can transmit data

38.

Multiplexing ______________

a)

devides the line into multiple channels

b)

Combine many channels into one line

c)

is the same as modulating

d)

is the same as demodulating

39.

As a signal travels through any medium ,its strength decreases due to ______________

a)

Noise

b)

Delay distortion

c)

Attenuation

d)

Re-Transmission

40.

Some Electromagnetic energy can be inserted somewhere during transmission ,which is normally called _____________

a)

Noise

b)

Delay distortion

c)

Attenuation

d)

Re-transmission

41.

The Receiver sends a ___________ back to the sender if everything was OK

a)

NAK

b)

PAK

c)

ACK

d)

NCK

42.

In Full duplex Communication ,_______________

a)

Only one party can transmit data

b)

Both parties can transmit data,but not at the same time

c)

Both parties can transmit data at same time

d)

No party can transmit data

43.

The Process of handing over the signal from the old Channel to the new one is called

a)

Transfer

b)

Change

c)

modification

d)

Hand-off

44.
What does LAN stand for?
a)
Local Area Network
b)
Legal Access Network
c)
Legendary Access Node
d)
Local Admin Network
45.
What does WAN stand for ?
a)
Weak Access Node
b)
Working Area Network
c)
Wide Area Network
d)
World Access Net
46.
What is this an image of?
a)
Star
b)
Bus
c)
WAN
d)
LAN
47.
What type of network is this?
a)
Star
b)
Mesh
c)
LAN
d)
WAN
48.
What type of network is this?
a)
Star
b)
Bus
c)
LAN
d)
WAN
49.
What type of network is this?
a)
Star
b)
Bus
c)
LAN
d)
WAN
50.
Choose an example of a WAN
a)
School
b)
College
c)
Netflix
d)
Single site
51.
What are the red arrows pointing at?
a)
Terminator
b)
Node
c)
Bus
d)
Network
52.
What is a disadvantage of a star network?
a)
It is cheap
b)
It uses one cable
c)
It is expensive
d)
It has a terminator
53.
What is a network?
a)
1 computer
b)
2 or more computers connected
c)
a film
d)
a server
54.

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

a)

Network Layer

b)

Data Link Layer

c)

Application Layer

d)

Physical Layer

55.

Transmission control protocol ___________ .

a)

is a connection-oriented protocol

b)

uses a three way handshake to establish a connection

c)

receives data from application as a single stream

d)

all of the mentioned

56.

An endpoint of an inter-process communication flow across a computer network is called __________.

a)

Socket

b)

Pipe

c)

Port

d)

Machine

57.

Which one of the following is a version of UDP with congestion control?

a)

Data Congestion Control Protocol

b)

Steam Control Transmission Protocol

c)

Structured Stream Transport

d)

User Congestion Control Protocol

58.

Which network topology requires a central controller or hub?

a)

Mesh

b)

Ring

c)

Star

d)

Bus

59.

Data communication system within a building or campus is________

a)

WAN

b)

LAN

c)

MAN

d)

PAN

60.

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

a)

Framing

b)

Error Control

c)

Flow Control

d)

Channel Coding

61.

Automatic repeat request error management mechanism is provided by ________

a)

logical link control sublayer

b)

media access control sublayer

c)

network interface control sublayer

d)

application access control sublayer

62.

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

a)

CSMA/CD

b)

CSMA/CA

c)

Both CSMA/CD & CSMA/CA

d)

HDLC

63.

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

a)

network layer

b)

physical layer

c)

transport layer

d)

application layer

64.

The ____ translates internet domain and host names to IP address.

a)

routing information protocol

b)

domain name system

c)

network time protocol

d)

internet relay chat

65.

Application layer protocol defines:

a)

types of messages exchanged

b)

message format, syntax and semantics

c)

rules for when and how processes send and respond to messages

d)

all of the mentioned

66.

The protocol data unit(PDU) for the application layer in the Internet stack is?

a)

Segment

b)

Datagram

c)

Message

d)

Frame

67.

Which of the following is public IP address ?

a)

10.15.14.12

b)

192.168.52.62

c)

172.32.1.1

d)

None of the Above

68.

If subnet mask 255.255.255.224, which of the following will be Direct Broadcast address ?

a)

202.15.19.127

b)

202.15.19.63

c)

Both a and b

d)

None of the above

69.

In class C , if subnet mask is 255.255.255.224 then calculates number of subnet?

a)

6

b)

8

c)

4

d)

None of the above

70.

If Direct Broadcast Address of subnet is 201.15.16.31. Which of the following will be subnet mask ?

a)

255.255.255.240

b)

255.255.255.192

c)

255.255.255.198

d)

None Of the Above

71.

Transmission media are usually categorized as:

a)

Fixed or unfixed

b)

Guided or unguided

c)

Determinate or indeterminate

d)

Metallic or non-metallic

72.

Transmission media lie below

a)

Physical

b)

Application

c)

Data link

d)

Network

73.

Which of the following uses guided media?

a)

Cellular telephone system

b)

Radio broadcast

c)

Local telephone system

d)

Satellite system

74.

Protocol for Network virtual terminal is___________

a)

FTP

b)

HTTP

c)

Telnet

d)

SMTP

75.

Which two layers of OSI are merged in network access layer of TCP IP model?

a)

Application, Presentation

b)

Data link, Physical

c)

Network, Data link

d)

None

76.

Which one of them is not application layer protocol?

a)

TCP

b)

HTTP

c)

FTP

d)

SMTP

77.

Segmentation and reassembly is done at __________ layer

a)

Session

b)

Presentation

c)

Transport

d)

Data Link

78.

Framing is done at _________ layer

a)

Physical

b)

Transport

c)

Data Link

d)

None

79.
Provides a connection oriented reliable service for sending messages
a)
TCP
b)
UDP
c)
IP
d)
All of the above
80.
Which of the following layer is called as end to end layer ?
a)
Physical Layer
b)
Datalink Layer
c)
Network Layer
d)
Transport Layer
81.
What is the meaning of bandwidth in network?
a)
Transmission capacity for communication channel
b)
Connected computers in the network
c)
Class of IP used in Network
d)
None of the above
82.
Computer network is
a)
Collection of hardware components and computers
b)
Interconnected by communication channel
c)
Sharing of resources and information
d)
All of the above
83.
Which of the following layer does error checking of data ? 
a)
Data Link Layer
b)
Network Layer
c)
Physical Layer
d)
Transport Layer
84.
The physical layer is responsible for the transmission of __  over the physical medium
a)
Packets
b)
bits
c)
message
d)
segment
e)
all of the above
85.
Protocols are
a)
Agreements on how communication components and DTE’s are to communicate
b)
Logical communication channel used for transferring data
c)
Physical communication channel used for transferring data
d)
None of the above
86.
In a broad sense a railway track is an example of  
a)
Simple
b)
Half Duplex
c)
Full Duplex
d)
All of the above
87.
A device that can convert digital signals to analog
a)
A packet
b)
A modem
c)
An emulator
d)
None of the above
88.
Local area networks can transmit
a)
Faster than telecommunications over public telephone lines
b)
Slower than telecommunication over public lines
c)
By using twisted or coaxial cable
d)
Both A and C
89.
A local area network 
a)
That connects thirty personal computers can provide more computing power than a minicomputer
b)
Control error detection and correction
c)
Constructs packets of data and sends them across the network
d)
None of the above
90.
Which layer of OSI model is responsible for semantics and syntax of data ?   
a)
Application
b)
Presentation
c)
Session
d)
Transport
91.
Which layer of OSI provides  reliable process to process message delivery and error recovery 
a)
Transport Layer
b)
Physical Layer
c)
Data Link Layer
d)
Presentation Layer 
92.
At network layer protocol defined by TCP/IP is 
a)
TCP
b)
UDP
c)
IP
d)
None of the above
93.
The______is the physical path over which a message travels
a)
Protocol
b)
Medium
c)
Signal
d)
All of the above
94.
Which topology requires a central controller or hub?
a)
Mesh
b)
Star
c)
Bus
d)
Ring
95.
Which topology requires a multipoint connection?
a)
Mesh
b)
Star
c)
Bus
d)
Ring
96.
Communication between a computer and a keyboard involves________
a)
simplex
b)
hal-duplex
c)
full-duplex
d)
automatic
97.
________connection provides a dedicated link between two devices
a)
point-to-point
b)
multipoint
c)
primary
d)
secondary
98.
______ is the protocol suite for the current internet.
a)
ACM
b)
UNIX
c)
TCP/IP
d)
NCP
99.

A _____________ can be defined as group of computers and other devices that are linked together for the purpose of sharing data and resources

a)

Computer Connection

b)

Computer Network

c)

Computer bridge

100.

Which of the following is not a advantage of computer networks?

a)

Virus infection

b)

Efficiency

c)

Redundancy

d)

Preserving information

101.

Expand NIC.

a)

Network Interaction Card

b)

Network internal Card

c)

Network Interface Card

102.

________________ is the box with the set of RJ-45 ports.

a)

Echo Dot

b)

Memory card

c)

Hub/Switch

103.

________________ have a wireless antenna, which increases the communication range of the radio signals.

a)

Routers

b)

Ethernet cables

c)

Gateway

104.

________________ is a computer network that is created for an individual person.

a)

LAN

b)

PAN

c)

WAN

105.

The best example for WAN is ______________.

a)

Local cable network

b)

Campus network

c)

Internet

106.

_________________ is an overall design of a computer network that describes how a computer network is configured and what strategies are being used in it.

a)

Network Topology

b)

Network Style

c)

Network Architecture

107.

A ______________ is a computer that provides services to clients or workstations.

a)

Main Computer

b)

Server/ Central Hub

c)

Service provider

108.

In which network each computer can act as a server as well as client?

a)

Peer-Peer network

b)

Client-Server network

109.

Which of the following device is used to connect two systems, especially if the systems use different protocols?

a)

Repeater

b)

gateway

c)

Bridge

d)

Hub

110.

HTTP stand for

(a)  

111.

The collection of links throughout the Internet creates an interconnected network called the

a)

WWW

b)

Web

c)

Wide Area Web

d)

All of the above

112.

A ____ is a set of rules

a)

Resource Locator

b)

Protocol

c)

Domain

d)

DNS

113.

DNS stands for

(a)  

114.

A ____ typically connects personal computers within a very limited geographical area, usually within a single building.

a)

LAN

b)

WAN

c)

MAN

d)

TAN

115.

Bluetooth is an example of

a)

LAN

b)

WAN

c)

MAN

d)

PAN

116.

The application layer of the OSI model is

a)

1

b)

5

c)

3

d)

7

117.

URL stands for

(a)  

118.

A Data Link Layer converts a packet of data into __ finally.

a)

bits

b)

bytes

c)

frames

d)

segments

119.

SMTP stands for

(a)  

120.

A Token Ring implementation works on the __ mode.

a)

Contention

b)

Reservation

c)

Round Robin

d)

None

121.

TCP groups a number of bytes together into a packet called _______

a)

Packet

b)

Buffer

c)

Segment

d)

Stack

122.

ARP stands for

(a)  

123.

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

a)

routing

b)

inter-networking

c)

congestion control

d)

error control

124.

TCP stands for

(a)  

125.

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

a)

spanning tree

b)

spider structure

c)

spider tree

d)

special tree

126.

The sharing of a medium and its link by two or more devices is called _________

a)

Fully duplexing

b)

Multiplexing

c)

Micro-pleixng

d)

Duplexing

127.

UDP stands for

(a)  

128.

A _____ is a TCP name for a transport service access point.

a)

port

b)

pipe

c)

node

d)

Protocol

129.

What is this a picture of?

a)

Cable

b)

Switch

c)

Wireless router

d)

Phone Mast

130.

What does LAN stand for?

a)

Local Area Network

b)

Line Area Network

c)

Local Around Network

d)

Listed Area Network

131.
A computer network can share printers and software.
a)
True
b)
False
132.

Hubs are more efficient in distributing data packets than Switches?

a)

True

b)

False

133.

Which network covers a large geographical area?

a)

LAN

b)

WAN

134.

A computer network is a system of:

a)

two or more computing devices connected to one another

b)

Data transfer and information storage

c)

Sharing devices like scanners

d)

A whole lot of individual machines working on their own

135.
Which if these terms refers to the maximum rate at which data can betransferred? (1-4)
a)
Error detection
b)
Packet switching
c)
Bandwidth
d)
Transmission media
136.
The rules that specify how data is transmitted.
a)
Protocols
b)
Parallels
c)
Bandwidth
d)
Mulitiplexers
137.

Which of these is not a network protocol?

a)

HTTP

b)

POP3

c)

SMTP

d)

HDMI

138.
What is the name for any device connected to a network? 
a)
Node
b)
Server
c)
Workstation
d)
Hub
139.
A device used to connect two networks that have different protocols.
a)
A Gateway
b)
A Bridge
c)
A Switch
d)
A Server
140.

(a)   is a way to identify and locate the computers connected to the internet. It must be unique.

141.

Identify the type of network in the above image

(a)  

142.

Identify the network device in the image

(a)  

143.

What is a modem? Why is it used?

4 lines
144.

What is POP3?

4 lines
145.

Identify the Image

a)

Types of Data Communication

b)

Phases of Data Communication

c)

Components of Data Communication

146.
What is a network?
a)
1 computer
b)
2 or more computers connected
c)
a film
d)
a server
147.

What transmission media picture is this?

a)

Fibre optics

b)

Twisted pair

c)

wireless medium

148.

Twisting in a twisted-pair help reduce the __________.

a)

length

b)

cost

c)

noise

d)

None of the choices are correct

149.

Match the picture to the transmission media

a)

coaxial cable

b)

fibre optic

c)

twisted pair

150.
The packets in _______________________
are independently sent, meaning that they can take different paths through the network to reach their intended destination
a)
Virtual-circuit packet switching
b)
Datagram packet switching:
c)
Circuit Switching
d)
Frame switching

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