iGCSE U2 Terminology

What do we call a small part of data that is transmitted over a network?

• data packet
• packet header
• packet trailer
• parity block
• parity byte

The packet header contains (tick all)

• IP address of the sender
• IP address of the receiver
• the packet number
• the packet trailer
• a check digit

For what is the packet number used?

• it allows the data packets to be reassembled correctly
• it records when the data was transmitted for security purposes
• it is a method used to confirm that all the data has been sent correctly
• it is a method used to test whether data has been corrupted or altered during transmission

The end of the data packet is known as the

• packet trailer
• packet header
• data packet tail
• parity block
• parity byte

When the total of all the 1-bits in the data packet payload are stored in the packet trailer, this is known as:

• Cyclic redundancy check
• hop number
• parity check
• echo check
• check digit

The data being carried in the data packet is known as the

• payload
• node
• ciphertext
• private key
• plaintext

Routers are ____ in communication networks.

• nodes
• payloads
• ARQs
• CRCs
• eavesdroppers

Nodes are

• stages in a network that can receive and transmit data packets.
• the actual data being carried in a data packet.
• the horizontal and vertical parity check on a block of data.
• data before it is put through an encrption algorithm

The method of transmission in which a message is broken into many data packets is known as

• packet switching
• real time streaming
• echo checking
• parity checking

In packet switching, data packets are sent along pathways independently of each other.

• True
• False