DATA COMMUNICATIONS AND NETWORKS

HOW PREPARED ARE YOU?

Below are some relevant questions that available for you try your hand on for the upcoming exams in DataCom and Networking.

Read carefully and answer all questions in this section

1. is a combination of hardware and software which provide the facility of exchanging

information between the computing devices.

A.  Peripheral

B.  Modem

C.  Network

D.  RAM

2.   Office LANs that are spread geographically apart on a large scale can be connected using a corporate.

A.  LAN

B.  MAN

C.  WAN

D.  DAN

3.   LANs can be connected by devices called …….. which operate on the data link layer.

A.  HDLC

B.  Hub

C.  Tunnel

D.  Bridges

4.   This device is used to connect your computer with a telephone line so that you can access information from other servers. It is known as

A.  Set-top box

B.  LAN card

C.  UPS

D.  Modem

5.   The information to be communicated in a data communication system is known as

A.  Medium

B.  Transmission

C.  Message

D.  Protocol

6.   Something which has easily understood instructions is said to be

A.  Information

B.  Icon

C.  Word processing

D.  User friendly

7.   Each computer has a/an ………… and some ……………

A.  Internet Browsers, Document files

B.  Operating system, Application Programs

C.  Hard Disk, Programming Programs

D.  Operating system, Tally

8.   In……. computers, computation is carried out with physical quantities such as voltage, length, current, temperature, etc.

A.  Analog

B.  Digital

C.  Hybrid

D.  Microcomputer

9.   In computer terminology, ‘CAD’ stands for

A.  Computer and Design

B.  Computer and Device

C.  Computer Algorithm in Design

D.  Computer-Aided Design

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

A.  Application

B.  Session

C.  Presentation

D.  Transport

11.   Error detection at the data link level is achieved by

A.  Equalization

B.  Bit stuffing

C.  Hamming codes

D.  Cyclic redundancy codes

12.   Which of the following techniques is used for allocating capacity on a satellite channel using fixed- assignment FDM?

A.  Frequency-shift keying

B.  Frequency modulation

C.  Frequency- division multiple access

D.  Amplitude modulation

13.   The connection between your computer at home and your local ISP is called…….

A.  The backbone

B.  The home page

C.  The home stretch

D.  The last mile

14.   Demodulation is the process of

A.  Dividing the high- speed signals into frequency bands

B.  Converting digital signals to analog signals

C.  Converting analog signals to digital signals

D.  Combining many low-speed channels into one high-speed channel

15.   Modulation is the process of

A.  Echoing every character that is received

B.  Sending a file from one computer to another computer

C.  Converting digital signals to analog signals

D.  Converting analog signals to digital signals

16.   Many low- shaped channels are interwoven into one high-speed transmission by

A.  Frequency- division multiplexer

B.  Time-division multiplexer

C.  Both (a) and (b)

D.  None of these

17.   Which of the following is the difference between a multiplexer and a statistical multiplexer?

A.  Multiplexer use X. 25 protocol, which statistical multiplexers use the Alpha protocol\

B.  Statistical multiplexers need buffers while multiplexers do not need buffers

C.  Multiplexers often waste the output link capacity while statistical multiplexers oppose its use

D.  Multiplexers use Time Division multiplexing (TDM), while statistical multiplexers use Frequency- division multiplexing (FDM)

18.   The synchronous modems are more costly than asynchronous modem because …..

A.  They operate with a large bandwidth

B.  They produce a large volume of data

C.  They contain clock recovery circuits

D.  They transmit the data with stop and start bits

19.   To connect a computer with a device in the same room, you might be likely to use

A.  A ground station

B.  A dedicated line

C.  A coaxial cable

D.  All of the above

20.   Which of the following is the fastest media of data transfer?

A.  Fiber optic

B.  Coaxial cable

C.  Untwisted wire

D.  Telephone lines

21.   Computer Network is

A.  Sharing of resources and information

B.  Collection of hardware components and computers

C.  Interconnected by communication channels

D.  All the above

22.   The speed at which the monitor accepts data is called

A.  Response time

B.  Interlacing

C.  Bandwidth

D.  Scanning

23.   This layer is the layer closest to the transmission medium

A.  Datalink

B.  Transport

C.  Network

D.  Physical

24.   E- commerce is not suitable for

A.  Sale/ purchase of mobile phones

B.  Sale/ purchase of branded clothes

C.  Sale/ purchase of expensive jewelry and antiques

D.  Online job searching

25. is used to refer amount of things

A.  Number representation

B.  Number algorithms

C.  Number system

D.  Number words

26.   Which of the following is required to communicated between two computers?

A.  Communication hardware

B.  Communication software

C.  Protocol

D.  All of the above, including access to a transmission medium

27.   A communication processor that connects dissimilar networks by providing the translation from one set of protocols to another is

A.  Modem

B.  Router

C.  Bridge

D.  Gateway

28.   The ground station in VSAT communication is called

A.  Hub

B.  HTTP

C.  Multiplexer

D.  Repeater

29. unit(s) in a……..single bus structure communicate at a time

A.  One

B.  Two

C.  Three

D.  Four

30.   In a …… topology, if there are n devices in a network, each device has n-1 ports for cable

A.  Bus

B.  Mesh

C.  Ring

D.  Star

31.   Where does the bridge operate in the OSI model?

A.  Application layer

B.  Data link layer

C.  Physical layer

D.  Both a and b

32.   In a ring topology, the computer in possession of the ….. can transmit data.

A.  Pocket

B.  Access method

C.  Data

D.  Token

33.   The advantage of LAN is

A.  Saving all your data

B.  Accessing the web

C.  Backing up your data

D.  Sharing peripherals

34.   IP addresses are converted to

A.  A hexadecimal string

B.  A hierarchy of domain names

C.  Alphanumeric string

D.  A binary string

35.   Encryption and Decryption are the functions of.............. Layers

A.  Transport

B.  Session

C.  Presentation

D.  Physical

36.   Which layer 4 protocol is used for a Telnet connection?

A.  TCP

B.  IP

C.  UDP

D.  TCP/IP

37.   To make an IPv4 address more compact and easier to read, the notation used is of………type.

A.  Dotted binary

B.  Dotted octal

C.  Dotted decimal

D.  Dotted hexadecimal

38.   The IPv4 addressing is known as the

A.  Class-less addressing

B.  Classful addressing

C.  Segmented addressing

D.  Unsegmented addressing