IGCSE CS Section 1

Data is broken into _____ before it is transmitted.

• datagrams

• parts

• packets

• sections

What is another word for data packets?

• packets

• data

• datagrams

Data packets are split up into ______

• packet header,

  payload,

  packet trailer

• packet header, payload

• payload,

  packet trailer

• packet trailer,

  packet header

Define packet header

• contains:

  IP address of sending and receiving stations

• contains the sequence number of the packet

• contains packet size

The payload is

• contain IP address of receiver and sender

• the actual data

• CRC

What is the packet trailer?

• the actual data

• IP address of receiver and sender

• CRC

Routers are known as

Define simplex

• data can be sent in one direction only

• data can be sent in both directions but not at the same time

• data can be sent in both directions at the same time

Define half-duplex

• data can be sent in one direction only

• data can be sent in both directions but not at the same time

• data can be sent in both directions at the same time

Define full-duplex

• data can be sent in one direction only

• data can be sent in both directions but not at the same time

• data can be sent in both directions at the same time