3.6. Network Services
We can now find our remote system and ensure that both systems are using the same level of communications. Now, how do we tell the server what we want? Although computers are powerful tools—capable of processing many requests per second—they still have a problem with the phrase, "You know what I mean?" This is why we need a way to let a system know exactly what we want from it. It would be a real bummer to connect to a slick new website only to have the server start spewing e-mail or routing information at you because it had no idea which of its data you're looking for.
To make sure the computer knows what you want from it, you need to look to the session layer.
You may remember from our discussion of the session layer ...