computer networks set 2 Detailed Explanation And More Example

Question : 1

A communications device that combines transmissions from several I/O devices into one line is a

a) concentrator

b) modifier

c) full-duplex line

d) multiplexer

Question : 2

What is the full form of USB as used in computer related activities ?

a) Universal Serial Bus

b) Ultra Serial Block

c) United Service Block

d) Universal Security Block

e) None of these

Question : 3

Computers send and receive data in the form of _________ signals.

a) Analog

b) Digital

c) Modulated

d) Demodulated

e) All of these

Question : 4

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

a) all of above including access to transmission medium

b) protocol

c) communication hardware

d) communications software

Question : 5

In a synchronous modem, the digital-to-analog converter transmits signal to the

a) demodulator

b) modulator

c) equalizer

d) terminal

e) none of above

Question : 6

Most data communications involving telegraph lines use:

a) simplex lines

b) wideband channel

c) dialed service

d) narrowband channel