Robbie Allen is a technical leader at Cisco Systems, where he has been involved in the deployment of Active Directory, DNS, DHCP, and several network management solutions. He enjoys working on Unix and Windows, and his favorite programming language is Perl. Robbie was named a Windows Server MVP in 2004 and 2005 for his contributions to the Windows community and the publication of several popular O'Reilly books. Robbie is currently studying at MIT in its system design and management program. For more information, see Robbie's web site at http: //www.rallenhome.com.