Jeremy D. Cioara, CCIE no. 11727, CCVP, MCSE, CNE, is the owner of AdTEC Networks and works as a network consultant, instructor, and author. He has been working in network technologies for more than a decade and has deployed networks worldwide. His current consulting work focuses on network and voice over IP (VoIP) implementations. Jeremy has written many books on Cisco network technology, but has a true passion for educating individuals both in the classroom and through e-learning environments. Jeremy currently lives with his wife in Phoenix, AZ.