Reputation: 855

Why might an IP datagram be encapsulated in another IP datagram?

I've seen references to this technique, but struggle to understand the purpose. What possible use might exist for such a construct?

Upvotes: 0

Answers (3)

Reputation: 8704

Tunneling? Implement a private protocol? Certainly many, many other uses.

Upvotes: 1

Reputation: 38265

In order to create a network tunnel.

In order to remotely monitor traffic.

Upvotes: 1

Reputation: 24082

It just took me a quick Google to come across an article explaining everything you need to know about the why and the how's of this:

Upvotes: -1