Networking & Internet
Protocol
Definition
In telecommunications, a communication protocol is a system of rules that allow two or more entities of a communications system to transmit information via any kind of variation of a physical quantity. The protocol defines the rules, syntax, semantics and synchronization of communication and possible error recovery methods.
Why It Matters
Protocols are what make communication possible. Just like humans need a shared language to talk to each other, network devices need shared protocols to exchange data in a structured and understandable way.
Contextual Example
HTTP, TCP, IP, DNS, and Ethernet are all examples of network protocols. Each one defines a specific set of rules for a particular aspect of communication.
Common Misunderstandings
- Protocols are often layered on top of each other. For example, a web request uses HTTP, which runs on top of TCP, which runs on top of IP.
- Following the established protocols is essential for interoperability between devices from different manufacturers.