PROTOCOL  is the rule with which data is transfer in the form of  packet. The process are responsible for transporting and formatting the data so that other system can understand them. Protocols are language of  networks.  

TCP/IP mainly use for wide area network. The TCP/IP protocol is the entire suite of the protocol that enabled end- to- end  connections as well as multicasting (sending the same information to many computers) connections. TCP/IP is amiable on most  operating systems and networks; enabling it to communicate between different network topology and configuration by routing your data through each of them.

This is a original protocol used in Microsoft networking, and has been updated constantly. Although it is the faster protocol included in the NT suite of protocol, It is intended for a single segment network and best supports between 20 and 200 computers. NetBEUI is not  routable and therefore not suitable to wide area network.  

This protocol is not intended to used for computers to communicate with each other and therefore does not have all the services the other protocol do. It is included in Windows NT to enable communication with HP jetdirect printers.