From the Editor - The Internet Protocol Journal, Volume 12, No.4

In our last issue we brought you Part 1 of a two-part article on Cloud Computing. T. Sridhar introduced various aspects of cloud computing, including the rationale, underlying models, and infrastructures. Part 2, subtitled "Infrastructure and Implementation Topics," is included in the current issue. Cloud computing has received a great deal of press in recent months and continues to be an area of rapid development. I'm confident that we will have more articles about this topic in future editions of IPJ.

With this issue we start a new series of articles under the general heading "Protocol Basics." The idea is to present a series of in-depth tutorials on numerous protocols that are used every day on the Internet and in enterprise networks. The articles will cover protocol details as well as implementation, deployment, and usage scenarios. In some cases the articles will also summarize the "lessons learned" and present "best-practice" guidelines. To start the series, we asked Bill Stallings to give us an overview of the Secure Shell (SSH) Protocol. We invite you to send us suggestions for other protocols that you'd like to see covered in this series.

Today's Internet is a result of many years of technological development and innovative uses of the resulting infrastructure. Of equal importance has been many policy choices made over the years, ranging from what protocols to use to how to allocate finite resources such as the IPv4 address space. A new book, Protocol Politics: The Globalization of Internet Governance, explores some of this history. The book is examined in an extended review by Tom Vest.

Let me remind you that we will no longer be automatically extending your subscription when it expires. Please take a moment to check your expiration date (printed on the back of the journal for subscribers in the United States, and on the envelope for our international subscribers). Visit the "Subscriber Services" section of our webpage at to update or renew your subscription. You can also contact us by e-mail to regarding any aspect of your subscription.

—Ole J. Jacobsen, Editor and Publisher