Joseph J. Byrne, MCSE, MCNE, ASE, CNP, A+, Network+, is a senior systems engineer with more than twenty years of experience in networking and software development. He is the author of two previous CompTIA certification books.
Diane McMichael Gilster, MCSE, i-Net+, Network+, has worked in computing and networking for more than 20 years. She is currently active as an IT certification trainer, consultant, and author.

Trevor Kay, A+, and Server+, Network+, has worked as an IT helpdesk consultant, technical support specialist, and network administrator. He is also the author of Server+ Certification Bible.

NIIT is a global IT solutions company that creates customized multimedia training products and has more than 2,000 training centers worldwide.

James H. Russell, Linux+, Network+, is a full-time computer-book author. His most recent work is a guide to SAIR Linux and GNU certification.

Ron Gilster, CCNA, A+, Server+, i-Net+, Network+, is the author of more than a dozen bestselling computer books. He has over 35 years of IT experience - most recently at a large regional wireless communications company.