Connectivity methods

Question 1

Fibre optics

Answer 1

• cabling made from glass that becomes very flexible when it is thin
• light passed through the cable using transmitter
• light travels quickly through the light-reflecting internal wall of the cable
• transmitter in router sends light pulses representing binary code
• when data is received, it’s decoded back to its binary form + computer displays message

Question 2

Copper cable

Answer 2

uses electrical signals to pass data between networks.

Question 3

Three types of copper cable:

Answer 3

coaxial, unshielded twisted pair and shielded twisted pair

Question 4

Coaxial

Answer 4

degenerates over long distances.

Question 5

Unshielded twisted pair

Answer 5

made by twisting the copper cables around each other and this reduces degeneration

Question 6

Shielded twisted pair

Answer 6

uses copper shielding around the twisted wires to make them less susceptible to interference

Question 7

3G/4G

Answer 7

• these can be accessed through a smartphone without a WiFi router.
• data is transmitted through the cellular phone network - enables anyone to connect to the internet as long as there’s a connection available.
• 3G - up to 6 Mbps to be downloaded and 4G for up to 18 Mbps.