1.1 Encapsulation & Decapsulation

Question 1

What is a PDU

Answer 1

PDU is Protocol Data Unit.
describes the form that any packet is in as it moves through the TCP/IP models layers.

EX: PDU for the physical layer is bits. PDU for the data link layer is a frame. PDU for the network layer is packets

Question 2

Describe Encapsulation

Answer 2

Encapsulation is known as Data being sent from the user starting with
Application Data at layer 5,6,7
TCP Headers on Layer 4
IP Header on the Left side on Layer 3
Frame Header on both sides in Layer 2

Question 3

Describe Decapsulation

Answer 3

Decapsulation describes Data that is being recived by the user starting with
Layer 2 removing the frame header on both sides
Layer 3 removing the ip Header on the left side
Layer 4 Removing the TCP Header on the left side
Layer 5,6,7 Receiving the Application Data

Question 4

What is TCP Flags

Answer 4

TCP Flags are within TCP Header within transfer process
containing information to indicate a particular connection state or provide additional information.

Question 5

What is MTU

Answer 5

MTU is Maximum transmission Unit
which defines the max size that a data can be before its Fragmented
The default standard value is 1500 bytes. However, you can increase the payload size of the packet, which allows you to send more data and increase the data transfer rates.