Describing the TCP/IP Encapsulation Process
The generic term data package is often used to describe the data container of information sent from one computer to another. Another term for this that is thrown around somewhat imprecisely in networking circles is packet. However, in the Cisco world, using the term packet in such a manner is technically incorrect.
As a data package is being built and pieces are being handed down from one layer to the next, this unit of information has a different name at each step. As you will see in the following sections, it is called a packet at only one specific point in the process. The following sections cover the package building process called encapsulation.
Understanding Data and PDUs
In Chapter 2, you learned ...