Acknowledgements

The NRL IPv6 code, and our exploration of protocol independence, was a team effort. Other than myself, the implementation team includes or has included Randall Atkinson, Ken Chin, Daniel McDonald, Ronald Lee, Bao Phan, Chris Telfer, and Chris Winters.

When I first pushed people to look at protocol independence issues in IPv6 API discussions, W. Richard Stevens, Jun-Ichiro ``itojun'' Hagino, and the KAME project team provided strong support for the idea, and their support was critical to the development of these APIs.

David Greenman, Kevin Skadron, and Chris Telfer reviewed early drafts of this paper and provided valuable feedback.