In this chapter, we will dive a bit further into understanding how communication occurs on a network and what makes a particular type of message unique. As you have learned about the different layers of both the Open Systems Interconnection (OSI) reference model and the Transmission Control Protocol/Internet Protocol (TCP/IP) protocol suite from the previous chapter, you will have realized each layer helps both the upper and lower layers with adding some important information to the Protocol Data Unit (PDU) and, in return, help with the communication of delivering the message between devices:
Here, we'll focus on providing a better understanding on the port numbers that reside at the Transport Layer of both the OSI model and the TCP/IP stack, and we'll discuss various network protocols at the Application, Transport, and Internet...