Whenever we send the data from one node to another in a computer network. The data is encapsulated at the sender's side, while it is de-encapsulated at the receiver's end.

What happens during the encapsulation process?

During encapsulation, each layer builds a protocol data unit (PDU) by adding a header and optionally a trailer, both of which contain control information to the PDU from the layer above.

What is encapsulation process?

Encapsulation can be defined as a process where a continuous thin coating is formed around solid particles, liquid droplets, or gas cells that are fully contained within the capsule wall (King, 1995).