Question

If the unit exchanged at the data link layer is called a frame and the unit exchanged at the network layer is called a packet, do frames encapsulate packets or do packets encapsulate frames? Explain your answer.

Answer 1

Solution:

Frames encapsulate packets.

The unit exchanged in the data link layer is called as frame.

The unit exchanged in the network layer is called a packet.

The data that sender sends moves from top most layer which is application layer and passes through all the below layers.

The data is received by the network layer from the transport layer.

This is passed on to the data link layer.

When the packet from the network layer arrives at the data link layer, it is considered as data field in the frame and adds the header to the frame.