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Introduction to Data Communications – 1 – 1

1. In simplex transmission _________.

(a) data format is simple.
(b) data transmission is one way.
(c) data transmission is two way.
(d) data can be transmitted to small distances only.

ANSWER

EXPLANATION

2. Typical bandwidth of optical fibers is ________.

(a) order of Hz.
(b) order of kHz.
(c) order MHz.
(d) order of GHz.

ANSWER

EXPLANATION

3. In half-duplex data transmission _________.

(a) data can be transmitted to small distances only.
(b) data can be transmitted in one direction only.
(c) data can be transmitted in both directions.
(d) data can be transmitted in both directions simultaneously.

ANSWER

EXPLANATION

4. Which media does not come under the guided media ?

(a) optical fibers
(b) coaxial cable
(c) microwave
(d) twisted pair

ANSWER

EXPLANATION

5. The transmission mode which allow both communicating devices to transmit and receive data simultaneously is ________.

(a) simplex
(b) full-duplex
(c) half-duplex
(d) none of these

ANSWER

EXPLANATION

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