Unit II - Data transmission (IGCSE) -key terms

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Computers
•
10th Grade
•
Easy
Computer Studies
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37 questions
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1.
FLASHCARD QUESTION
Front
What is a data packet?
Back
A small part of a message/data that is transmitted over a network; after transmission, all the data packets are reassembled to form the original message/data.
2.
FLASHCARD QUESTION
Front
What does a packet header contain?
Back
The IP addresses of the sender and receiver, and includes the packet number which allows reassembly of the data packets.
3.
FLASHCARD QUESTION
Front
What is a packet trailer?
Back
The part of a data packet that indicates the end of the data packet and includes the cyclic redundancy check (CRC) for error checking.
4.
FLASHCARD QUESTION
Front
What is cyclic redundancy check (CRC)?
Back
An error checking method in which all the 1-bits in the data packet payload are added, and the total is stored in the packet trailer; the same calculation is repeated at the receiving station.
5.
FLASHCARD QUESTION
Front
What is the payload in a data packet?
Back
The actual data being carried in a data packet.
6.
FLASHCARD QUESTION
Front
What is a node in a network?
Back
Stages in a network that can receive and transmit data packets; routers are nodes in communication networks.
7.
FLASHCARD QUESTION
Front
What is packet switching?
Back
A method of transmission in which a message is broken into many data packets which can then be sent along pathways independently of each other.
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