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This article shares with you the content about the network structure can be divided into several layers. Xiao Bian thinks it is quite practical, so share it for everyone to make a reference. Let's follow the editor and have a look.

The network architecture can be divided into seven layers: application layer, presentation layer, session layer, transport layer, network layer, data link layer and physical layer.

7-layer network architecture

The 7 layers refer to the OSI 7-layer protocol model, which mainly includes: Application layer, Presentation layer, Session layer, Transport layer, Network layer, Data Link layer and Physical layer.

OSI Model Main Protocol Units TCP/IP Application Layer Telnet, FTP, HTTP, SNMP Data Stream Application Layer Presentation Layer CSS GIF HTML JSON XML GIF Data Stream Session Layer FTP SSH TLS HTTP(S) SQL Data Stream Transport Layer TCP UDP Data Segment Transport Layer Network Layer IP (IPV4, IPV6) ICMP packet Internet layer Data link layer 802.2, 802.3 ATM, HDLC, frame Network interface layer Physical layer V.35, EIA/TIA-232 Bit stream structure name function Main equipment Application layer determines communication object, provides interface for accessing network services Gateway presentation layer is responsible for encoding and transforming data (Interface and binary data conversion, high-level language and machine language conversion) Data compression, decompression, encryption, decryption. Depending on the purpose of the application, it is processed into different formats, which is represented by the various file extensions we see. The gateway session layer is responsible for establishing, maintaining, and controlling three communication modes: Simplex, half duplex, and full duplex. The gateway transport layer is responsible for dividing and combining data, implementing end-to-end logical connection three-way handshake, connection-oriented or connectionless-oriented services, and flow control. Is the first end-to-end, host-to-host hierarchy. Gateway network layer is responsible for managing network addresses, locating devices, determining routing routers, bridge routers Data link layer is responsible for preparing physical transmission, CRC check, error notification, network topology, flow control, etc. Switches, bridges, network cards Physical layer is the actual physical link, responsible for sending and receiving data in the form of bit streams Hub, repeater, cable, transmitter, receiver Thank you for reading! About the network structure can be divided into several layers to share here, I hope the above content can be of some help to everyone, so that everyone can learn more knowledge. If you think the article is good, you can share it so that more people can see it!

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