The TCP/IP model is a description framework for computer network protocols created in the 1970s by DARPA, an agency of the United States Department of Defense.TCP/IP is the short form of transmission control protocol and Internet protocol.
Tcp/ip is the basic communication language or protocol of the Internet, nowadays. It can also be used as a communications protocol in a private network (either an intranet or an extranet, VPN). When you access Internet, your computer is provided with a copy of the TCP/IP program just as every other computer that you may send messages to or get information from also has a copy of TCP/IP. The TCP/IP Model is just another model ,which replaced OSI (because of various drawbacks and lack of protocols).
There are 4 layers of TCP/IP , which are divided into two groups.
- Transmission protocol- It the higher layer, that manages the assembling of a message or file into smaller packets that are transmitted over the Internet and received by a TCP layer that reassembles the packets into the original message.
- Internet protocol -Its the lower layer, that handles the address part of each packet so that it gets to the right destination.
