1000+ Data Communications and Networking Questions and Answers Pdf - 1

Question: 1

A device that links two homogenous packet broadcast local networks, is

(A) gateway

(B) repeater

(C) bridge

(D) hub

Question: 2

In geosynchronous orbit, satellite

(A) moves simultaneously

(B) moves faster than the earth’s rotation so that it can cover larger portion of earth

(C) remains in a fixed position related to points on earth

(D) remains in a fixed position so that as earth rotates, it can fully cover the earth

Question: 3

Bus is

(A) a collection of interconnected functional units that provides a data communications service among stations attached to the network

(B) the condition when two or more stations attempt to use the same channel at the same time

(C) a continuous frequency capable of being modulated or impressed with a second signal

(D) one or more conductors that some as a common connection for a related group of devices

Question: 4

Demodulation is the process of

(A) dividing the highest speed signals into frequency bands

(B) combining many low speed channels into one one high speed channel

(C) converting analog signals to digital signals

(D) converting digital signals to analog signals

Question: 5

Which of the following technique is used for allocating capacity on a satellite channel using fixed assignment FDM?

(A) frequency division multiple access

(B) frequency modulation

(C) frequency shift keying

(D) amplitude modulation