How TCP/IP works

Transmission control protocol/Internet protocol known as TCP/IP defines the way data is sent across the entire computer network. TCP/IP protocol suits suggest that data is sent in the form of packets. TCP/IP protocol suit is formulated in the form of layers, one after the other and each of these layers has unique functionalities which very well define the propagation of packet from the source port to the destination port of intended computers. 

IP or Internet Protocol is the most important term associated with TCP/IP. It is because all the data are sent in the form of IP packets through the network. Simply speaking, IP does the work of a postal worker whose job is to simply route or sort the letters. He transfers the letters to the next available delivery route or path and same is the work of Internet protocol. 

The most interesting question associated with TCP/IP is how a source will identify its destination located at the other part of the world? Here comes the importance of IP addresses which is absolutely unique for each and every computer. The IP address is a combination of network id and host id where the network part will suggest the network that computer belongs and the host is will suggest the host part of that computer.