Networking is divided into variety of protocols like
- SMPT -: simple mail transfer protocol
- UDP -: user datagram protocol
- TCP/IP -: Transmission control protocol/internet protocol
- FTP -: File transfer protocol
- GTP -: Gateway discover protocol
- HTTP -: Hyper text transfer protocol
Amongst all these, TCP/IP protocol are highly used protocols. There are basically seven OSI (Open systems interconnection) layers, where the TCP/IP routes under transport layer which is the forth layer in OSI system model shown in the picture below.

OSI layer
The TCP/IP is basically bound together because, if incase the IP loses some packets at the time of packet transmission the TCP finds these errors and detects them to recollect the respective packets and make its working effective and efficient. These days IP’s are used which are known as IPv4 i.e IP version 4 consisting of 16 bits, however no sooner IPv6 are going to be launched. There a IP conflicts being committed in public networks hence there is an introduction of IPv6.