2.4 Bandwidth And Latency

Question 1

Bandwidth

Answer 1

• no. of bits carried by a connection in a sec

Question 2

High bandwidth

Answer 2

• faster upload/download
• faster multiplayer gaming
• HD vid streaming

Question 3

Buffer

Answer 3

• area of memory where video portion is temporarily stored
• used when streaming
• empty buffer = no video to play

Question 4

Latency

Answer 4

• time taken to send data between devices

Question 5

Factors affecting speed & vol of data transfer

Answer 5

• transfer method
• interference
• blockages
• distance

Question 6

Local Area Network

Answer 6

Connects devices in small geographical area

Question 7

Wide Area Network

Answer 7

Connects devices in large geographical area

Question 8

Personal Area Network

Answer 8

Group of devices all near one user

Question 9

Tethering

Answer 9

Connecting host devices that use mobile broadband connection (3G-4G) with other devices

Question 10

Satellite communication

Answer 10

• Antennae to receive radio signals from satellites
• Adv: always available
• Disadv: affected by weather
• Uses: GPS, TV, telephone

Question 11

Broadcast communication

Answer 11

Take messages from one sender to transmit on all networks

Question 12

Analogue TV and radio

Answer 12

Broadcast station transmitter sends signals > viewers antenna receives & sends signal to TV/radio receiver

Question 13

Digital TV/radio

Answer 13

Video and audio > digital signal > compressed into packets of compressed data > TV antenna receives it

Question 14

Wired communication

Answer 14

HDMI, s/PDIF, minijack, USB, Ethernet

Question 15

Wireless communication

Answer 15

Wifi, Bluetooth, 3G/4G, Infra-red, NFC