Network Virtualization using Generic Routing Encapsulation

Okay kiddo, imagine you have a big box of toys but you want to keep them all separate and organized. This is kind of what network virtualization does, it keeps different "toys" or parts of the network separate so they don't get mixed up.

One way to do this is called generic routing encapsulation, or GRE for short. Think of it like putting a toy in a box with a label on it telling you what toy is inside. With GRE, we put a label on each piece of data that tells it where to go and what virtual network it belongs to.

So when different parts of the network talk to each other, they can only see the data that's labeled for their own virtual network. It's like each one has its own special toy box, and they can only play with the toys inside their own box.

This helps keep everything organized and safe, so different parts of the network can work together without accidentally messing up or interfering with each other. It's like having lots of playrooms, but with some toys only allowed in certain rooms.

Overall, network virtualization using GRE helps make the network more flexible and efficient, which makes everyone happy!