Computer Networks - II — Question 10

TCP/IP is the base communication protocol of the Internet. IP part of TCP/IP uses numeric IP addresses to join network segments and TCP part of TCP/IP provides reliable delivery of messages between networked computers.

TCP is responsible for making sure that the commands get through to the other end. It keeps track of what is sent, and retransmits anything that did not get through.

TCP/IP applications use the following four layers:

1. an application protocol (such as mail)
2. a protocol such as TCP that provides services need by many applications
3. IP, which provides the basic service of getting datagrams to their destination
4. the protocols needed to manage a specific physical medium, such as Ethernet or a point to point line.