Description: The Internet is working in client/server mode, and the server opens some network services on some ports for the arrival of client requests. The network services provided by the transport layer have both TCP and UDP services. The transport layer is a layer in the network architecture. The layers below the transport layer can be called transport service providers, and the layers above are called transport service users. The transport layer is in the middle, which USES both the service provided by the transport service provider and the transport service consumer. The transport layer is the most important layer in the network architecture, so it is important to understand the function and protocol of the transport layer. The goal of this course is to familiarize yourself with the concepts of TCP protocol and port.
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