Glen E Clarke

Glen E. Clarke, CCNA, MCSE, MCDBA, MCSD, CompTIA A+, CompTIA Network+, CompTIA Security+, works as an independent technical trainer and consultant. He teaches courses on Windows, SQL Server, Exchange Server, CompTIA A+, and IT security. Clrke is the author of CompTIA Network+ Certification Study Guide, Fifth Edition and CompTIA Security+ Study Guide, Second Edition.