The 7-layer network structure is: Application layer (Application), presentation layer (Presentation), session layer (Session), transport layer (Transport), network layer (Network), data link layer (Data Link) ), physical layer (Physical).
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What are the seven-layer network structures?
7-layer network structure
Layer 7 refers to the OSI seven-layer protocol model, mainly: application layer (Application), presentation layer (Presentation), Session layer (Session), transport layer (Transport), network layer (Network), data link layer (Data Link), physical layer (Physical).
OSI Model | Main Protocol | Unit | TCP/IP |
Application layer | Telnet, FTP, HTTP, SNMP, etc. | Data flow | Application layer |
CSS GIF HTML JSON XML GIF | Data flow | ||
FTP SSH TLS HTTP(S) SQL | Data flow | ||
TCP UDP | Data segment | Transport layer | |
IP(IPV4, IPV6) ICMP | Data packet | Internet layer | |
802.2, 802.3ATM, HDLC, | Frame | Network interface layer | |
V.35, EIA/TIA-232 | Bitstream |
Function | Main equipment | ##Application layer |
Gateway | Presentation layer | |
Gateway | Session layer | |
Gateway | Transport layer | |
Gateway | Network layer | |
Router, bridge router | Data link layer | |
Switches, network bridges, network cards | Physical layer | |
hub, relay Transmitter, cable, transmitter, receiver |
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