A protocol is a set of standard rules that helps to communicate the hardware devices through the software applications. There are different types of protocols used in the Internet and Intranet applications. They are
TCP which stands for Transmission Control Protocol. It has the rules to exchange the messages between two different Internet applications.
Internet Protocol uses the rules for sending and receiving the information between two different Internet addresses.
Similarly, HTTP, FTP and DHCP protocols are used the set of rules to transfer the data other than Internet applications.