Modes Of transmission

Question 1

What are the three data flows (data communication modes)

Answer 1

Simplex
Half-Duplex
Full-Duplex

Question 2

What is simplex?

Answer 2

One way communication. One can transmit and one can only receive.

Question 3

What is half-duplex

Answer 3

Data can be transmitted in both directions but only in one at a time.

Question 4

What is a disadvantage of half duplex?

Answer 4

A lot of time is wasted in changing direction

Question 5

What is duplex mode?

Answer 5

Data can be transmitted and received simultaneously

Question 6

How is data transmitted?

Answer 6

Via three channels:

Narrowband
Voiceband
Broadband

Question 7

What is narrowband?

Answer 7

Data is transmitted at a slow speed (just over 10 characters per second)

Question 8

What is voiceband

Answer 8

Telephone lines are utilized allowing data to be transmitted up to 8000 characters per second

Question 9

What is a broadband?

Answer 9

uses fiber optic cables, microwaves and satellite transmissions to allow very fast transmission. (Hundreds of thousands of characters per second)