What Is TCP/IP? The Basics of Internet Communication

TCP/IP is the foundational set of rules that lets every device on the internet find and talk to every other device.

IP: The Addressing System

The Internet Protocol assigns every device a unique address and handles routing data toward it, similar to how a postal system routes mail using addresses.

TCP: Reliable Delivery

The Transmission Control Protocol breaks data into packets, ensures they all arrive, and reassembles them in the correct order — trading a bit of speed for guaranteed reliability.

Why It Matters

Every website visit, email, and file download relies on this same underlying system working correctly, mostly invisible to end users.

Further Reading

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