the network communication protocol is always designed in different layers the protocol in every layer has its own responsibility in the communication
tcp/ip is referred to protocol system which crosses four layers in the network tcp protocol can build a reliable data transmission channel between two hosts in the network it can divide the data into small packets which can be transmitted in the network Beyond the basic function tcp also takes charge of the packet reception and the retransmission time and so on according to the reliable point-to-point data transmission provided by tcp the applications in the system can neglect all the trivial details