Why does the transport layer provide effective and reasonable transport services?

The transport layer is located between the application layer and the network layer. Its function is to provide effective and reasonable transmission services for the application layer based on the services provided by the communication subnet; so that high-level users do not need to care when communicating with each other. Communication subnet implementation details and specific service quality.

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

The transport layer provides effective and reasonable transmission services for the application layer.

Transport layer

• The transport layer provides communication services to the application layer above. It belongs to the highest layer of the communication-oriented part and is also the user The lowest level of functionality. The transport layer provides logical communication for application processes that communicate with each other. It mainly includes two protocols: TCP protocol and UDP protocol.

• The main functions of the transport layer: segment and encapsulate data sent from the application layer; provide end-to-end transmission services; build logical communication between the sending host and the receiving host.

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