Understanding the three-way handshake
Let's talk about how polite computers are when it comes to communicating with each other, shall we? So, part of the scanning concept is understanding what they refer to as the three-way handshake. Again, it's very polite.
Mike O'Cain, who is an American football coach and former player, once said I don't remember who came up with the handshake idea, but it was a great one.
This is true because there are some advantages when it comes to the three-way handshake and computers.
To understand the three-way handshake, you must get your geek on. You need to understand what's going on in the background. To cover this in a way that makes sense, we'll look at TCP and UDP communications. We'll also look at the different flags that a TCP header has. After that, we'll look at the extremely normal three-way handshake and ensure you understand the communication that goes on between computers as they're about...