Introduction to Data Communications – Exercise – 1

Introduction to Data Communications » Exercise – 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.

2. Typical bandwidth of optical fibers is ________.

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

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.

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

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

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

6. The network topology in which devices are not linked to each other and where hub acts as a central controller is _________.

(a) tree
(b)  star
(c) ring
(d)  mesh

7. Which of the following topology share a single channel on which all stations can receive and transmit data ?

(a) LAN
(b)  BUS
(c) RING
(d)  TREE

8. In which topology data packet is removed by the source destination ?

(a) tree
(b)  star
(c) ring
(d)  mesh

9. The _______ provides mobile subscriber network access over an air interface.

(a) core network plane
(b)  TV access plane
(c) radio access plane
(d)  end-user services plane

10. The sharing of information, which includes transfer and preservation of data, is called ________.

(a) switching
(b)  modulation
(c) data communication
(d)  transmission medium

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