Before data is sent over a network, it is split up into multiple pieces called ......

• envelopes

• packets

• parcels

Each one has a ...... that tells other computers where the data is going, where it has come from and which numbered piece it is.

• footer

• sticker

• header

The individual pieces of data are then sent using ......, which means that if one piece goes missing it can be resent or, if one piece takes a long time to arrive, other pieces can be sent via a different route.

• direct messaging

• circuit switching

• packet switching

Data is split into packets. Which one or more of the following does each packet contain?

• A portion of the original data

• All the original data

• A header

• The email address of the recipient

The header in a packet contains which one or more of the following?

• The IP address of the sender

• A portion of the original data

• The email address of the recipient

• The IP address of the recipient

Which one or more of the following correctly explain why using packets is helpful?

• Smaller packets can travel further than large packets

• If some of the data doesn't arrive, the individual packet containing that data can be re-sent.

• If one packet doesn't arrive quickly, other packets can be sent via different routes.

• The total size of the individuals packets is less than the size of the original data

True or False

All packets are sent using the same route to make sure none of them get lost.

• True

• False

True or False

Packets will always arrive in the order they were sent.

• True

• False

True or False

Two packets with the same destination will always be sent via the same route.

• True

• False

True or False

Packet switching typically means that a collection of data arrives successfully at its destination more quickly than if packet switching is not used.

• True

• False