LO1 1.4 The Internet

Question 1

Copper cables characteristics

Answer 1

Uses electrical signals to pass data between networks
Three types : coaxial, unshielded twisted pair and shielded twisted pair
Cheaper to install
Degenerates over a distance - needs boosting
Malleable - easier to bend and less likely to break
Lower bandwidth

Question 2

Speed and range of copper cables

Answer 2

Speed = 20mbps megabits per second
Range = 100m

Question 3

Fibre optic cables characteristics

Answer 3

Light beams down thin strands of plastic or glass by making them bounce repeatedly off the walls
Resistant to electromagnetic interference
Difficult and costly to install
Very fast but expensive
Higher bandwidth
More fragile

Question 4

Speed and range of fibre optic cables

Answer 4

Speed = 10gbps gigabits per second
Range = 100 mbps for 2km

Question 5

Satellite internet characteristics

Answer 5

Relays and amplifies radio telecommunications signals via a transponder
Lag - not good for real time games etc
Covers entire Earth
Needs replaced after 15 years
Delay between data transmission and it being received because of distance

Question 6

Range and speed of satellite connection

Answer 6

500mbps
Range 75000km

Question 7

Microwave internet characteristics

Answer 7

Uses radio waves in the microwave frequency range to send and receive high- speed data between two fixed sites or locations
Low initial cost
Low latency
Antennas Requires line of sight
Weather interference
Shared bandwidth reduces speed for users

Question 8

Range and speed of microwave connection

Answer 8

500mbps
50km

Question 9

Mobile data networks characteristics

Answer 9

Data is transmitted through the cellular phone network rather than the physical cabled network of broadband
Anyone can connect as long as it’s available
Good rate of data transfer
Some areas do not have signal
Data costs can be prohibitive

Question 10

Range and speed of mobile date networks

Answer 10

3G = 6mbps
4g =18mbps
5g= 100mbps
30km

Question 11

Connection characteristics

Answer 11

Latency = is the delay when sending data across a network
Bandwidth = is the maximum amount of data that can be sent across a network at once
Contention = refers to wether a network is dedicated
Range = distance a signal can be sent
Data differences = capacity to carry data