David Davis (CCIE #9369, CWNA, MCSE, CISSP, SCSA) has been in the IT industry for 12 years. He currently manages a group of systems/network administrators for a privately owned retail company and authors IT-related material in his spare time. He has written over fifty articles, eight practice tests, and co-authored one book. David's "real-world" experience combined with his diversity of skills (Windows, Cisco, Unix & Security) gives you a powerful learning resource that can't be matched.