Network Layer Services Packetizing

For Complete YouTube Video: Click Here

We will try to understand the Network Layer Services Packetizing in this class.

We have already discussed the concepts of Data Link Layer in our previous classes.

Packetizing encapsulates the payload in a network-layer packet at the source and decapsulates the ‘payload’ from the ‘packet’ at the destination.

Every layer in Networking has its concerns or design issues.

One of the central issues of the network layer is packetizing.

To understand the concept of packetizing, we will consider the image below.

The layers in the above image are the layers in the TCP/IP architecture.

The message or the data generated at the application layer is transferred to the transport layer.

As shown in the above image, the transport layer header gets added to that message, which is called a payload.

Now the payload of the transport layer is transferred to the network layer.

At the network layer, the network layer header gets added to that message.

This process of adding or encapsulating the network layer header to the source’s payload is called packetizing.

The packet is transferred to the data link layer to which the header will be added, called framing.

Similarly, the decapsulation of the header gets done at the destination.

We did a clear explanation in the link provided above.