David Hucaby, CCIE No. 4594, is a lead network engineer for the University of Kentucky, where he works with healthcare networks based on the Cisco Catalyst, IP telephony, PIX, and VPN product lines. David has a bachelor of science degree and master of science degree in electrical engineering from the University of Kentucky. He is the author of three previous books for Cisco Press, including Cisco ASA and PIX Firewall Handbook, Cisco Field Manual: Router Configuration, and Cisco Field Manual: Catalyst Switch Configuration. David lives in Kentucky with his wife, Marci, and two daughters.