What is the necessity of IP-in-IP?

Posted by Claudiu on Stack Overflow See other posts from Stack Overflow or by Claudiu
Published on 2008-12-11T18:15:30Z Indexed on 2010/05/02 20:28 UTC
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There is even a standard for IP in IP encapsulation. What is the use case here? I can understand stuff like TCP over DNS, where IP might be unavailable, but if you can do IP in IP, couldn't you simply do regular IP?

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