A network protocol is an established set of rules that determine how data is transmitted
between different devices in the same network
A network protocol can be viewed as a common network communication standard,
which is used to define a method of exchanging data over a computer network.
Network protocols define rules and conventions for communication between different
devices, participating in a computer network.
Examples of standard network protocols are TCP (Transmission Control Protocol), UDP
(User Datagram Protocol),IP (Internet Protocol), ARP (Address Resolution Protocol),
HTTP (Hypertext Transfer Protocol), FTP (File Transfer Protocol), TFTP (Trivial File Transfer
Protocol), SMTP (Simple Mail Transfer Protocol), SSH (Secure Shell), Telnet etc.