Introduction to TCP/IP
This lesson provides an introduction to TCP/IP. I am sure you’ve heard of TCP/IP… though you may wonder why you need to understand it. Well, TCP/IP is the language that governs communications between all computers on the Internet. A basic understanding of TCP/IP is essential to understanding Internet technology and how it can bring benefits to an organization.
We’re going to explain what TCP/IP is and the different parts that make it up. We’ll also discuss IP addresses.
As it turns out, dividing IP addresses into classes A, B and C is not flexible enough. In particular, it does not make efficient use of the available
Most IP addresses today use IP version 4—we’ll talk about IP version 6 later. IPv4 addresses are 32 bits long and are usually written in “dot” notation. An
– Application layer – File Transfer Protocol (FTP) – Remote Login (Telnet) – E-mail (SMTP) – Transport layer – Transport Control Protocol (TCP) – User Datagram Protocol (UDP) – Network layer –
TCP/IP is shorthand for a suite of protocols that run on top of IP. IP is the Internet Protocol, and TCP is the most important protocol that runs