Data Transmission

Question 1

What is a data packet broken down into?

Answer 1

Header:
- Number of data packets
- Packet number
- Source and Destination Addresses
- Protocol

Payload:
-Data

Trailer:
- Any error checking information

Question 2

What device sends packets across a network?

Answer 2

Routers

Question 3

Packet switching

Answer 3

Method of transmitting data packets across a network where other transmissions are happening at the same time. The router uses a lookup table to find the most efficient route, if it can’t find where to forward it, it will ask other routers to use their lookup table until the destination is found

Question 4

Serial data transmission

Answer 4

Data is sent one after another on the same channel

Question 5

Parallel data transmission

Answer 5

Data is sent simultaneously along multiple channels.

Question 6

Why is parallel data transmission unreliable over longer distances?

Answer 6

• Data can arrive at different times due to different speeds
• Interference can be caused between the different channels

Question 7

USB 3 advantages

Answer 7

• Low power consumption
• Easy to use
• Can charge connected device