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Computers Networks

Total questions: 32

Worksheet time: 17mins

Name
Class
Date
1.
Provides a connection oriented reliable service for sending messages
a)
TCP
b)
UDP
c)
IP
d)
All of the above
2.
Which of the following layer is called as end to end layer ?
a)
Physical Layer
b)
Datalink Layer
c)
Network Layer
d)
Transport Layer
3.
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
4.
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
5.
Which of the following layer does error checking of data ? 
a)
Data Link Layer
b)
Network Layer
c)
Physical Layer
d)
Transport Layer
6.
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
7.
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
8.
A device that can convert digital signals to analog
a)
A packet
b)
A modem
c)
An emulator
d)
None of the above
9.
In a broad sense a railway track is an example of  
a)
Simple
b)
Half Duplex
c)
Full Duplex
d)
All of the above
10.
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
11.
Which layer of OSI model is responsible for semantics and syntax of data ?   
a)
Application
b)
Presentation
c)
Session
d)
Transport
12.
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
13.
Which layer of OSI model is responsible for semantics and syntax of data ?   
a)
Application
b)
Presentation
c)
Session
d)
Transport
14.
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 
15.
At network layer protocol defined by TCP/IP is 
a)
TCP
b)
UDP
c)
IP
d)
None of the above
16.
The______is the physical path over which a message travels
a)
Protocol
b)
Medium
c)
Signal
d)
All of the above
17.
Which topology requires a central controller or hub?
a)
Mesh
b)
Star
c)
Bus
d)
Ring
18.
Which topology requires a multipoint connection?
a)
Mesh
b)
Star
c)
Bus
d)
Ring
19.
Communication between a computer and a keyboard involves________
a)
simplex
b)
hal-duplex
c)
full-duplex
d)
automatic
20.
________connection provides a dedicated link between two devices
a)
point-to-point
b)
multipoint
c)
primary
d)
secondary
21.
______ is the protocol suite for the current internet.
a)
ACM
b)
UNIX
c)
TCP/IP
d)
NCP
22.

The biggest WAN

a)

Internet

b)

Intranet

c)

Extranet

23.

use a single backbone cable

a)

Mesh

b)

Star

c)

Bus

d)

Ring

24.

passes data over the physical network

a)

transport layer

b)

internet layer

c)

link layer

d)

application layer

25.

providing networking services to applications

a)

transport layer

b)

internet layer

c)

link layer

d)

application layer

26.

encrypts all information sent and received

a)

HTTP

b)

FTP

c)

HTTPS

d)

SMTP

27.

retreieve emails from server

a)

HTTP

b)

FTP

c)

SMTP

d)

IMAP

28.

Responsible for packet switching

a)

TCP

b)

UDP

c)

IP

d)

FTP

29.

What is Internet Protocol (IP) 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

30.

A router usually connects to a device inside the home before reaching the Internet. This device is called

a)

cable

b)

switch

c)

router

d)

modem

31.

Which of these indicates a website is secure?

a)

You found the website on Google or clicked it from a link in an email.

b)

A little lock icon next to the website address.

c)

The website shows a company name and logo and looks real.

32.

Fiber optic cables consist of very fine strands of glass transmitting data via

a)

magnetic pulses

b)

light pulses

c)

electricity

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