Silvia Hagen is CEO of Sunny Connection AG in Switzerland and she has served as a senior consultant and analyst to many mid- and large-sized companies She is the author of "Novell's Guide to Troubleshooting TCP/IP" (ISBN 0-7645-4562-0)  published by Wiley & Sons  "IPv6 Essentials  Second Edition" published by O'Reilly (ISBN 0-5961-0058-2) and "SLP -- Guide to Service Location Protocol " published by Podbooks (ISBN 1-893939-359)