Packet sending and encapsulation process of TCP/IP

Transmission Layer -------------------------------- tcp udp ------------------------ the data at the layer is generated by the application process, and the TCP or UDP packet header is added to the network layer.

 

Network Layer ------------------------------- ip icmp (Ping application) IGMP ----- data at the layer will be added with an IP packet header (20 bytes) to form an IP packet and transmitted to the data link layer.

 

Data link layer -------------------------- arp rarp ---------------------- the data will be added with a Mac packet header (14 bytes) to form a Mac packet (including the MAC address information of the sender and receiver) and transmitted to the physical layer.