William Panek, MCTS, MCITP, MCT, CCNA, CHFI, is founder of Stellacon Corporation, a Microsoft Certified Gold Partner and a Certified Learning Solutions Provider and leading training provider on the East Coast. Prior to founding Stellacon, William was an instructor for The Training Associates, instructing at such schools as Boston University, Clark University, and New Horizons, among others. He is the author of MCTS: Windows Server 2008 Active Directory Configuration Study Guide and MCTS: Windows Server 2008 Network Infrastructure Configuration Study Guide, both by Sybex.