Unit 9

Question 1

Parallel transmission

Answer 1

where multiple bits of data are sent simultaneously over an number of parallel wires

Question 2

Serial transmission

Answer 2

where bits are sent one after another along a single wire / interface

Question 3

skew

Answer 3

Parallel transmission seems fastest but tiny differences in the makeup of the transmission wires mean that the different bits can arrive at the destination causing errors

Question 4

Crosstalk

Answer 4

Interference that can happen between the wires of a parallel connection resulting in corrupted data, something more pronounced at higher frequencies

Question 5

Synchronous transmission

Answer 5

transmission of data is at regular intervals governed by a clock signal allowing for constant and reliable transmission

Question 6

Asynchronous transmission

Answer 6

byte at a time is sent and there is no need to synchronise with other signals, the synchronisation required is built in

Question 7

Baud rate

Answer 7

the number of possible signal changes per second

Question 8

Bit rate

Answer 8

number of bits transmitted per second
-baud rate * number of bits per signal

Question 9

Bandwidth

Answer 9

the range of frequencies that a medium can carry at once

Question 10

Latency

Answer 10

the time delay between when the transmission of the first byte or packet of data is sent and when it is received at the destination

Question 11

Protocols

Answer 11

agreed rules that systems follow in order communicate and function correctly

Question 12

peer-to-peer network

Answer 12

each computer has equal status.

Question 13

client-server network

Answer 13

most computers are nominated as clients (also called workstations) and one or more as servers. The clients request services from the servers, which provide these services.
-needs a central server