The Internet Protocol Journal (IPJ) is published quarterly by Cisco Systems. The journal is not intended to promote any specific products or services, but rather is intended to serve as an informational and educational resource for engineering professionals involved in the design, development, and operation of public and private internets and intranets. The journal carries tutorial articles ("What is...?"), as well as implementation/operation articles ("How to..."). It provides readers with technology and standardization updates for all levels of the protocol stack and serves as a forum for discussion of all aspects of internetworking.

Topics include, but are not limited to:

Access and infrastructure technologies such as: ISDN, Gigabit Ethernet, SONET, ATM, xDSL, cable, fiber optics, satellite, wireless, and dial systems
Transport and interconnection functions such as: switching, routing, tunneling, protocol transition, multicast, and performance
Network management, administration, and security issues, including: authentication, privacy, encryption, monitoring, firewalls, trouble-shooting, and mapping
Value-added systems and services such as: Virtual Private Networks, resource location, caching, client/server systems, distributed systems, network computing, and Quality of Service
Application and end-user issues such as: e-mail, Web authoring, server technologies and systems, electronic commerce, and application management
Legal, policy, and regulatory topics such as: copyright, content control, content liability, settlement charges, "modem tax," and trademark disputes in the context of internetworking

In addition to feature-length articles, IPJ contains standardization updates, overviews of leading and bleeding-edge technologies, book reviews, announcements, opinion columns, and letters to the Editor.

Cisco will pay a stipend of US$1000 for published, feature-length articles. Author guidelines are available from Ole Jacobsen, the Editor and Publisher of IPJ, reachable via e-mail at ole@cisco.com

This publication is distributed on an "as-is" basis, without warranty of any kind either express or implied, including but not limited to the implied warranties of merchantability, fitness for a particular purpose, or non-infringement. This publication could contain technical inaccuracies or typographical errors. Later issues may modify or update information provided in this issue. Neither the publisher nor any contributor shall have any liability to any person for any loss or damage caused directly or indirectly by the information contained herein.

The Internet Protocol Journal

Ole J. Jacobsen, Editor and Publisher

Editorial Advisory Board

Dr. Vint Cerf, VP and Chief Internet Evangelist
Google Inc, USA

Dr. Jon Crowcroft, Marconi Professor of Communications Systems
University of Cambridge, England

David Farber
Distinguished Career Professor of Computer Science and Public Policy
Carnegie Mellon University, USA

Peter Löthberg, Network Architect
Stupi AB, Sweden

Dr. Jun Murai, General Chair Person, WIDE Project Vice-President,
Keio University Professor, Faculty of Environmental Information
Keio University, Japan

Dr. Deepinder Sidhu, Professor, Computer Science & Electrical Engineering, University of Maryland, Baltimore County
Director, Maryland Center for Telecommunications Research, USA

Pindar Wong, Chairman and President
VeriFi Limited, Hong Kong

The Internet Protocol Journal is published quarterly by the Chief Technology Office, Cisco Systems, Inc.
www.cisco.com
Tel: +1 408 526-4000
E-mail: ipj@cisco.com

Cisco, Cisco Systems, and the Cisco Systems logo are registered trademarks of Cisco Systems, Inc. in the USA and certain other countries. All other trademarks mentioned in this document are the property of their respective owners.