computer networks set 5 Detailed Explanation And More Example

Question : 1

A modem

a) translates analog signals from a computer into digital signals that can travel along conventional telephone lines.

b) translates digital signals from a computer into analog signals that, can travel along conventional telephone lines.

c) demodulates digital signals from a computer.

d) modulates signals from an analog telephone lines.

e) None of these

Question : 2

An example of a medium speed, switched communications service is

a) series 1000

b) data phone 50

c) All of the above

d) ODD

e) none of the above

Question : 3

Encryption and decryption are functions of

a) Transport layer

b) None of these

c) Presentation layer

d) Allot the above

e) Session layer

Question : 4

DSL is an example of a(n) _____ connection.

a) network

b) wireless

c) slow

d) None of these

e) broadband

Question : 5

A term related to sending data to a satellite is

a) downlink

b) modulate

c) demodulate

d) uplink

e) inter-relate

Question : 6

A permanent virtual circuit involves

a) All of the above

b) Data transfer

c) Connection release

d) Connection establishment

e) None of these