Networks and Communication

Question 1

What is data communication

Answer 1

Sending and receiving from 1 device to another

Question 2

How can data be sent

Answer 2

Serial Transmission

Parallel Transmission

Question 3

What are the features of serial transmission

Answer 3

Data is sent a few bits at a time over a single wire

Very high rates of data transfer can be achieved using fibre optic wires

Question 4

What are features of parallel transmission

Answer 4

Bits of data sent simultaneously over a number of parallel wires
Used in integrated circuits and within RAM
Only reliable over short distances due to skew

Question 5

What is bit rate

Answer 5

Speed at which data is transmitted

Question 6

What is baud rate

Answer 6

The rate at which signal changes

Question 7

What is bandwidth

Answer 7

Range of frequencies that a transmission medium can carry

Question 8

What is latency

Answer 8

Time delay between the moment that transmission of the 1st byte of communication starts and when it is received.

Question 9

What is parity

Answer 9

The parity bit is appended to a binary string to give the correct number of on(1) bits. If there is an even parity there should be an even number of on bits. Vice versa for odd parity