Encapsulation and Decapsulation

Question 1

Encapsulation

Answer 1

The process of putting headers (and trailers) around some data.

Question 2

Protocol Data Unit (PDU)

Answer 2

A single unit of information transmitted in a computer network.

Question 2

FIN (Finished)

Answer 2

Used to tear down the virtual connections created using the three-wey handshake and the SYN flag.

Question 3

SYN (Synchronization)

Answer 3

Used to synchronize connection during the three-way hadnshake.

Question 4

RST (Reset)

Answer 4

Used when a client or server receives a packet that it was not expecting during the current connection.

Question 4

ACK (Acknowledgment)

Answer 4

Used during the three-way handshake, but also used to acknowledge the successfull receipt of packets.

Question 5

PSH (Push)

Answer 5

Used to ensure data is given priority and is processed at the sending or receiving ends.,

Question 6

URG (Urgent)

Answer 6

Similiar to PSH and identifies incoming data as urgent.

Question 7

Mac Address

Answer 7

Physical address that is used to identify a network card on a local area network.

Question 8

EtherType

Answer 8

Used to indicate which protocol is encapsulated in the payload of a frame.