What is TCP/IP protocol?

TCP/IP (Transmission Control Protocol/Internet Protocol) is a suite of communication protocols used to interconnect network devices on the internet. It specifies how data is exchanged over the internet by providing end-to-end communications that identify how it should be broken into packets, addressed, transmitted, routed and received. It's the fundamental protocol suite upon which the internet is built, enabling applications like web browsing, email, and file transfer.