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Computer Networks

Total questions: 112

Worksheet time: 58mins

Name
Class
Date
1.

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

2.

Which one of the following terms refer to the most popular LAN technology

a)

Ethernet

b)

WAN

c)

Internet

d)

Intranet

3.

Which one of the following is a typical example of a web address?

a)

http:telko@info.uk

b)

alex@intellect.co.za

c)

http://www.eaglewood.co.za

d)

C:/computers.za

4.

Which one of the following terms refer to wireless radio communication?

a)

Bluetooth

b)

Bandwidth

c)

GPS

d)

Ethernet

5.
What type of network is this?
a)
Ring 
b)
Bus 
c)
Star
d)
Mesh
6.
In a star network
a)
Each device is connected to a switch or hub
b)
Each device connects to each other
c)
Each device is connected in a line
d)
Each device is connected to a terminal
7.
The internet is the worlds biggest
a)
LAN
b)
WAN
8.
What does LAN stand for?
a)
Local Art Network
b)
Localise Aerial Network
c)
Local Area Network
d)
Local Area News
9.
A router can
a)
Forward data packets
b)
Absorb signals
c)
Repeat signals
d)
absorb data packets
10.
What term describes the physical layout of a network?
a)
Topology
b)
topping
c)
topiology
d)
toppology
11.

A device that is used to connect a number of LANs is –

a)

Router

b)

Repeater

c)

Bridge

d)

All of these

12.

If all devices are connected to a central hub, then topology is called

a)

Bus Topology

b)

Ring Topology

c)

Star Topology

d)

Tree Topology

13.

Which of these is an advantage of a Bus network?

a)

Easy to install

b)

Fast

c)

Good security

14.

Which of these is an advantage of a Ring network?

a)

Expensive

b)

Reliable

c)

Fast

15.

Which of these is an advantage of a Star network?

a)

No extra hardware needed

b)

Reliable

c)

Cheap

16.

What type of network is this?

a)

Bus

b)

Ring

c)

Star

17.

Which of the following network diagrams represents star topology?

a)
b)
c)
d)
18.

what network topology is this

a)

star

b)

mesh

c)

bus

d)

tree

19.
An advantage of a mesh network topology is that there is no central node to fail - True or False?
a)
True
b)
False
20.
All computers have Network Interface Cards built in
a)
True
b)
False
21.

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

22.

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

23.

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

a)

Socket

b)

Pipe

c)

Port

d)

Machine

24.

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

25.

Which network topology requires a central controller or hub?

a)

Mesh

b)

Ring

c)

Star

d)

Bus

26.

Data communication system within a building or campus is________

a)

WAN

b)

LAN

c)

MAN

d)

PAN

27.

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

a)

Framing

b)

Error Control

c)

Flow Control

d)

Channel Coding

28.

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

29.

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

30.

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

31.

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

32.

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

33.

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

a)

Segment

b)

Datagram

c)

Message

d)

Frame

34.

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

35.

Transmission media are usually categorized as:

a)

Fixed or unfixed

b)

Guided or unguided

c)

Determinate or indeterminate

d)

Metallic or non-metallic

36.

Transmission media lie below

a)

Physical

b)

Application

c)

Data link

d)

Network

37.

Which of the following uses guided media?

a)

Cellular telephone system

b)

Radio broadcast

c)

Local telephone system

d)

Satellite system

38.

Protocol for Network virtual terminal is___________

a)

FTP

b)

HTTP

c)

Telnet

d)

SMTP

39.

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

40.

Which one of them is not application layer protocol?

a)

TCP

b)

HTTP

c)

FTP

d)

SMTP

41.

Segmentation and reassembly is done at __________ layer

a)

Session

b)

Presentation

c)

Transport

d)

Data Link

42.

Framing is done at _________ layer

a)

Physical

b)

Transport

c)

Data Link

d)

None

43.

A _______ is the physical path over which a message travels.

a)

path

b)

medium

c)

protocol

d)

route

44.

A _________ set of rules that governs data communication.

a)

Protocols

b)

Standards

c)

Servers

d)

RFC's

45.

Three or more devices share a link in ________ connection

a)

unipoint

b)

point-to -point

c)

multipoint

d)

Simplex

46.

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

47.

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

a)

broadcast network

b)

multicast network

c)

unicast network

d)

anycast network

48.

Bluetooth is an example of __________

a)

wide area network

b)

virtual private network

c)

local area network

d)

personal area network

49.

Network congestion occurs _________

a)

when connection between two nodes terminates

b)

in case of traffic overloading

c)

when a system terminates

d)

in case of transfer failure

50.

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

51.

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

52.

The packet of information at the application layer is called __________

a)

Packet

b)

Segment

c)

Message

d)

Frame

53.

The network layer is concerned with __________ of data.

a)

bytes

b)

packets

c)

bits

d)

frames

54.

ICMP is primarily used for __________

a)

routing

b)

forwarding

c)

addressing

d)

error and diagnostic functions

55.

The application layer of the OSI model is

a)

Four layer

b)

Five layer

c)

Seven layer

d)

Six layer

56.

The vast network of computers that connects millions of people all over the world is called

a)

Internet

b)

Hypertext

c)

LAN

d)

Web

57.

A distributed network configuration in which all data/information pass through a central computer is

a)

Bus network

b)

Star network

c)

Ring network

d)

Point-to-point network

58.

Networks are monitored by security personnel and supervised by _____ who set(s) up accounts and passwords for authorized network users.

a)

IT managers

b)

The government

c)

Password administrators

d)

Network administrators

59.

Which of the following is required to communicate between two computers?

a)

Communications software

b)

Protocol

c)

Communications hardware

d)

All of the above

60.

The number of layers in ISO OSI reference model is __________

a)

4

b)

5

c)

6

d)

7

61.

Which layer provides the services to user?

a)

application layer

b)

session layer

c)

presentation layer

d)

physical layer

62.

Firewalls are often configured to block ___________

a)

UDP traffic

b)

TCP traffic

c)

Sensitive traffic

d)

Best-effort traffic

63.

Routers operate at which layer of the OSI model?

a)

physical

b)

transport

c)

network

d)

MAC sublayer of the data link layer

e)

session

64.

Bits are packaged into frames at which layer of the OSI model?

a)

data link

b)

transport

c)

physical

d)

presentation

e)

application

65.

Which of the following are benefits of using a layered network model?


A . it specifies how changes to one layer must be propagated through the other layers

B . it facilitates troubleshooting

C . it focuses on details rather than general functions of networking

D . it breaks the complex process of networking into more manageable chunks

E . it allows layers developed by different vendors to interoperate.

a)

A and B only

b)

B, D, and E

c)

A and C only

d)

none of the above

e)

all of the above

66.

The layers of the OSI model, from the top down, are:

a)

application, presentation, session, transport, network, data link, physical

b)

session, presentation, data transport, MAC, network, physical

c)

physical, data link, network, transport, session, presentation, application

d)

presentation, application, session, network, transport, data link, physical

e)

application, encryption, network, transport, logical link control, physical

67.

Which of the following operate at the presentation layer?

A . MIDI

B . FTP

C . SMTP

D . TFTP

E . JPEG

a)

A and B

b)

A, C, and E

c)

C and E

d)

A and E

e)

none of the above

68.

Which of the following are transport layer protocols?

a)

TCP and UDP

b)

IP

c)

FTAM

d)

IP and TFTP

e)

TFTP

69.

Which of the following are considered to be the upper layer protocols?

a)

presentation and session

b)

application and presentation

c)

application, presentation, and session

d)

application, presentation, session, and transport

e)

application

70.

Flow control takes place at which layer?

a)

physical

b)

transport

c)

network

d)

MAC sublayer of the data link layer

e)

session

71.

Encryption takes place at which layer?

a)

application

b)

presentation

c)

session

d)

transport

e)

data link

72.

True or False: The network layer uses physical addresses to route data to destination hosts.

a)

True

b)

False

73.

Error detection and recovery takes place at which layer?

a)

transport

b)

presentation

c)

data link

d)

application

e)

network

74.

Which layer establishes, maintains, and terminates communications between applications located on different devices?

a)

application

b)

presentation

c)

session

d)

network

e)

data link

75.

IP is implemented at which OSI model layer?

a)

transport

b)

session

c)

data link

d)

network

e)

logical link control

76.

Which layer handles the formatting of application data so that it will be readable by the destination system?

a)

application

b)

presentation

c)

session

d)

transport

e)

data link

77.

Which of the following are presentation layer standards?

(choose the best answer)

A. MIDI

B. TIFF

C. JPEG

D. MPEG

E. GIF

a)

C and D

b)

B, C, and E

c)

B, C, D, and E

d)

A only

e)

all of the above

78.

Packets are found at which layer?

a)

data link

b)

transport

c)

network

d)

session

e)

physical

79.

Which layer translates between physical (MAC) and logical addresses?

a)

network

b)

data link

c)

transport

d)

physical

e)

session

80.

What does OSI stand for?

a)

International Standards Organization

b)

Open Systems Interconnect

c)

Operating Standard Information

d)

Operating System Interconnection

e)

Open Systems Interface

81.

Repeaters and hubs operate at which layer?

a)

network

b)

data link

c)

transport

d)

physical

e)

session

82.

Bit synchronization is handled at which layer?

a)

data link

b)

session

c)

transport

d)

presentation

e)

physical

83.

True or False: most logical addresses are preset in network interface cards at the factory

a)

True

b)

False

84.

Bridges operate at which layer of the OSI model?

a)

physical

b)

data link

c)

transport

d)

network

e)

session

85.

What are the sublayers of the data link layer?

a)

MAC and IPX

b)

hardware and frame

c)

MAC and LLC

d)

WAN and LAN

e)

TFTP and telnet

86.

Which layer translates between physical and logical addresses?

a)

the MAC sublayer of the data link layer

b)

transport

c)

physical

d)

application

e)

network

87.

Which layer is responsible for packet sequencing, acknowledgments, and requests for retransmission?

a)

The MAC sublayer of the data link layer

b)

transport

c)

physical

d)

application

e)

network

88.

If you use either Telnet or FTP, which is the highest layer you are using to transmit data?

a)

Application

b)

Presentation

c)

Session

d)

Transport

89.

Which of the following are layers in the TCP/IP protocol suit?

1.Application 2.Session 3.Transport 4.Internet 5.Data-Link 6.Physical

a)

1 & 2

b)

1,3 & 5

c)

2,3 & 5

d)

3,5 & 6

90.

Which of the following are TCP/IP protocols used at the Application layer of the OSI model?

a)

IP

b)

TCP

c)

Telnet

d)

FTP

91.

The OSI model has (a)   layers.

92.

OSI stands for

a)

open system interconnection

b)

operating system interface

c)

optical service implementation

d)

none of the mentioned

93.

Application layer provides the services to end-user.

a)

True

b)

False

94.

In the layer hierarchy as the data packet moves from the upper to the lower layers, headers are

a)

added

b)

removed

c)

rearranged

d)

modified

95.

Which layer coordinates the functions required to transmit a bit stream over a physical medium?

a)

transport

b)

network

c)

data link

d)

physical

96.

Encryption and decryption does not occur at___

a)

Router

b)

Switches

c)

Source Host

d)

Destination Host

97.

Why was the OSI model developed?

a)

Manufacturers disliked the TCP/IP protocol suite

b)

The rate of data transfer was increasing exponentially

c)

Standards were needed to allow any two systems to communicate

d)

None of the above

98.

The function of Physical Layer?

a)

Error correction and Detection

b)

Piggybacking

c)

Flow Control

d)

Determine number of volts to represent 1 or 0

99.

What does TCP stand for?

a)

Transfer Control Protocol

b)

Transmission Control Protocol

c)

Transfer Character Protocol

d)

Transmission Character Protocol

100.

Which protocol is used to send packets

a)

IP

b)

FTP

c)

SMTP

d)

TCP

101.

Which is not a layer in the TCP/IP model?

a)

Application

b)

Transmission

c)

Internet

d)

Network

102.

Which are not one of the application layer protocols?

a)

DNS

b)

FTP

c)

SMTP

d)

FNP

103.

What kind of address is made up of hex pairs and stored on each device's NIC?

a)

MAC

b)

TCP

c)

IP

d)

DNS

104.

Which of the TCP/IP model layers is responsible for breaking down the message into packets?

a)

Network

b)

Application

c)

Transport

d)

Internet

105.
HTTP stands for..
a)
.. Hyper Technology Transmission Piece 
b)
Hypertext Transfer Protocol
c)
Hypertext Talking Package 
d)
Hypertext Transfer Program 
106.
Which protocol would you use to transfer files?
a)
FTP
b)
SMTP
c)
POP3
d)
HTTP
107.
Which of these is NOT part of the header?
a)
Packet Number
b)
Sender IP Address
c)
Size of Packet
d)
Name of File
108.
What is a protocol?
a)
Any peripheral device
b)
A person that uses a client
c)
Rules for networks and communications
d)
A circuitboard with the components to send/receive data
109.
What is TCP used for?
a)
To send information across the internet in packets
b)
To ensure that information is sent to the correct computer
c)
To send mail across the internet
d)
To transmit webpages across the internet
110.
Which of these are mail protocols?
a)
SMTP and POP
b)
TCP and FTP
c)
FTP and SMTP
d)
POP and IP
111.
Which topology is this?
a)
Bus
b)
Star
c)
Ring
d)
Wave
112.
What is a network?
a)
Two or more computers connected to each other
b)
Computers in a circle
c)
Clients receiving data from servers
d)
Spiders doing a job

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