Encapsulation and DecapsulationOne of the important concepts in protocol layering in the Internet is encapsulation/decapsulation.
As the object passes through each layer, an information header (and or trailer) is added to the object.
Each layer receives an object that is referred to as the payload, and then attaches a data header.
The information header is used to assist in any of these tasks: routing of the object, flow control, error detection, error correction, etc.