Mastering™ Network Security, Second Edition

3.5. Connectionless and Connection-Oriented Communications

We can now get our information from Point A to Point B, regardless of whether the systems are on the same logical network. This raises the question, Once we get there, how do we carry on a proper conversation? This is where the transport layer comes in.

The transport layer is where we begin to set down the rules of communication etiquette. It's not enough that we can get this information from one system to another; we also have to ensure that both systems are operating at the same level of decorum.

As an analogy, let's say you pull up to the finest restaurant in the city in your GMC Pacer and proceed to the front door sporting your best set of leather chaps, Harley jacket, and bandanna. ...