Shulou(Shulou.com)06/02 Report--

OSI network layer 7 protocol

Physical layer: the bit stream is transmitted by the network cable interface and the optical fiber interface, and the bit stream is binary like 1010101.

Data link layer: the bit stream is transmitted normally by radio and has error correction function.

Network layer: bitstreams are transmitted by addressing devices such as routers and switches over the IP protocol.

Transport layer: once the IP protocol address is found, the bitstream data is encapsulated and sent out one by one like express delivery.

Session layer: but each time can not be sent manually to find the IP address, so the establishment of automatic reception, automatic addressing function

Presentation layer: sent, but the Linux system does not support opening exe,window can not open shell script all the presentation layer with encryption and compression conversion function

Application layer: this is the final display of people and computers.

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