What layer of protocol is tcp?

tcp is the "transport layer" protocol. TCP refers to "Transmission Control Protocol", which is a connection-oriented, reliable, byte stream-based transport layer communication protocol; TCP supplements the Internet Protocol, which defines the IP address used to identify systems on the Internet, mainly Ensure end-to-end data transfer between different nodes.

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

Transmission Control Protocol (TCP, Transmission Control Protocol) is a connection-oriented, reliable, byte stream-based Transport layer communication protocol, specified by IETF's RFC 793 definition.

TCP supplements the Internet Protocol (IP Protocol), which defines the IP address used to identify systems on the Internet, mainly ensuring end-to-end data transmission between different nodes . Internet Protocol provides instructions for transmitting data, while TCP creates connections and ensures data is delivered to the correct destination. These two protocols usually work together and are called the TCP/IP suite.

The TCP/IP hierarchical model is divided into the following four layers:

1. Application layer, corresponding to the high level of the OSI reference model, provides users with various services required;

2. Transport layer, which provides end-to-end communication functions for application layer entities, ensuring the sequential transmission of data packets and data integrity;

3. Network layer, responsible for adjacent nodes Communication between;

4. Network interface layer, responsible for monitoring the exchange of data between the host and the network.

TCP works in conjunction with the Internet Protocol, which defines the logical location of remote nodes, while TCP transports and ensures data is delivered to the correct destination.

TCP is designed to accommodate a layered protocol hierarchy that supports multiple network applications. TCP is relied upon to provide reliable communication services between pairs of processes in a host computer connected to different but interconnected computer communication networks. TCP assumes that it can obtain simple, possibly unreliable datagram services from lower-level protocols. In principle, TCP should be able to operate on top of a variety of communications systems, from hardwired connections to packet-switched or circuit-switched networks.

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