2. Data Transmission Part 1 - Computer Science CIE IGCSE

How is data transmitted?

• In data packets

• In routers

• By hardware

• With algorithms

How large is a typical data packet?

• 8 bytes

• 64 KiB

• 32 MiB

• 16 GiB

Are data packets all sent along the same route to their destinations?

• Yes

• No

Data is

• Broken up into data packets

• Sent as a whole in a data packet

Select the three parts that make up a data packet

• Header

• Payload

• Trailer

• Data

• Source

What does a packet header contain?

• IP address of sender/originator

• IP Address of destination

• Error check

• Sequence/packet number

• Size of the packet in bytes

What does a packet payload contain?

• IP address of sender/originator

• IP Address of destination

• Error check

• Actual data

• Size of the packet in bytes

What does a packet trailer contain?

• IP address of sender/originator

• IP Address of destination

• Error check

• End of packet identifier

• Size of the packet in bytes

What controls the route a packet takes?

• Routers

• The Header

• The payload

• The trailer

What are routers contained in?

• Nodes

• Payload

• Header

• Footer