Linux Network Overview

• OSI Reference Model and TCP/IP Reference Model

  As shown in. OSI's application layer, presentation layer and session layer correspond to the application layer of TCP/IP, the transport layer of OSI corresponds to the transport layer of TCP/IP, the OSI network layer corresponds to TCP/IP network layer, and the network interface layer of OIS data link layer and physical layer corresponding to TCP/IP.

  
  
• Hierarchy of protocols and corresponding network models

  As shown: Telnet, FTP, SMTP, DNS, SNMP corresponds to the application-layer TCP (Tranmisson Control Protocol Protocol), UDP (user Datagram Protocol Subscriber Datagram Protocol), RIP Corresponding Transport layer ARP, IP (Internet Protocol Internetwork Protocol) corresponding network layer IEEE802.3, IEEE802.4, IEEE802.5, ANSI x3t9.5 corresponding network interface layer

  
  
• Encapsulation relationship of the Protocol

  It can be seen that the protocol is directly a encapsulated relationship. The network interface layer encapsulates the network layer, the network layer encapsulates the transport layer, and the transport layer encapsulates the application layer;

  
  

Linux Network Overview