What is TCP? tccicomputercoaching.com
The Transmission Control Protocol is one of the main protocols of the Internet protocol suite.
TCP (Transmission Control Protocol) is a standard that defines how to establish and maintain a network
conversation via which application programs can exchange data. TCP works with the Internet Protocol (IP), which defines how computers send packets of data to each other.
The Transmission Control Protocol is the most common transport layer protocol. It works together with IP and provides a reliable transport service between processes using the network layer service provided by the IP protocol.
TCP provides connection oriented service. It defines 3 different phases:
- Connection establishment
- Data transfer
- Connection termination
Therefore, TCP is reliable as it uses checksum for error detection, attempts to recover lost or corrupted packets by re-transmission, acknowledgement policy and timers.
The data is sent and received as a stream of bytes.
The network layer, that provides service for the TCP, sends packets of information not streams of bytes. Hence, TCP groups a number of bytes together into a segment and adds a header to each of these segments and then delivers these segments to the network layer.
Here, the communication can take place in both directions at the same time.
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