Packet, TCP Header, IP Header, Ethernet Header

• Packet

Packets are bundles of appropriate sizes when sending and receiving data. In other words, it is the unit of transmission of cut data to facilitate transmission over the network.

For example, data is divided into packet units and transmitted to IP layer.

Packet data transmission/reception flow.

 

- Data Encapsulation

When sender sends data to the receiver, it is the process of putting header on the data.

 

- Data Decapsulation

When receiver receives data from the sender, it is the process of removing header to read the data.

 

reference : https://blog.naver.com/sung_mk1919/221177021021 

 

• TCP Header

reference : https://evan-moon.github.io/2019/11/10/header-of-tcp/

 

• IP Header

Structure of IP Header

reference : https://blog.naver.com/kjh131222/220454591360 

 

• Ethernet Header