It's the one thing when I'm configuring things that makes me wince because I know it will give me the business, and I know it shouldn't, but it does, every time. I have no real idea what I'm doing, what it is, how it works, so of course I'm blindly following instructions like a monkey at a typewriter.
Please guide me into enlightenment.
The short answer is, when your computer sends a message over the network, the IP address specifies which computer should receive the message, and the port specifies which program should receive the message.