TCP/IP protocol model

TCP/IPProtocol

 

I,OSIModel

NameLevelFunction

Physical Layer1Physical connection between computer systems and networks

Data Link Layer2Package and unpackage data to form an Information Frame

Network Layer3Provides a route for data passing through

Transport Layer4Transmission order information and response

Session Layer5Establish and abort a connection

Presentation Layer6Data conversion and validation data format

Application Layer7Provide usersProgramInterface

Ii. Protocol level

Common protocols and hierarchical relationships in the Network

 

1,Process/Application Protocol

The most extensive protocol at ordinary times. Each Protocol at this layer is composed of two parts: the customer program and the service program. The program works through interaction between the server and the client. Common protocols include:Telnet,FTP,SMTP,HTTP,DNS.

2,Host-host Layer Protocol

Establishes and maintains connections to ensure the security of data transmission between hosts. This layer mainly has two Protocols:

TCP(Transmission Control Protocol: Transmission Control Protocol; connection-oriented and reliable transmission

UDP(User datasync Protocol): User Datagram Protocol for connectionless and unreliable Transmission

3,InternetLayer Protocol

Responsible for data transmission, finding routes between different networks and systems, segmentation and restructuring of data packets, as well as device addressing. Some layers include the following protocols:

IP(Internet Protocol): InternetAgreement, responsibleTCP/IPThe datagram service is provided between hosts to encapsulate data and generate protocol headers,TCPAndUDPThe basis of the Protocol.

ICMP(Internet Control Message Protocol):InternetControl the packet protocol.ICMPThe Protocol is actuallyIPSubsidiary Agreement of the Agreement,IPThe protocol uses it to exchange error messages and other network conditions with other hosts or routers.ICMPThe package contains control information and fault recovery information.

ARP(Address Resolution Protocol) Protocol: Address Resolution Protocol.

RARP(Reverse Address Resolution Protocol): Reverse Address Resolution Protocol.