, CCIE No. 1624, has been in the networking industry since 1981. He has worked as a network engineer, consultant, systems engineer, instructor, and course developer; he currently works writing and creating certification tools. He is author of all the previous editions of the CCNA Exam Certification Guides from Cisco Press, as well as the CCNP ROUTE 642-902 Official Certification Guide, the CCIE Routing and Switching Official Exam Certification Guide, Computer Networking First Step, the CCNA Video Mentor, and other titles. He is also the primary networking consultant for the CCNA 640-802 Network Simulator.
Titles by the Author
CCENT/CCNA ICND1 100-105
CCNA Routing and Switching ICND2 200-105 Official Cert Guide
Cisco QOS Exam Certification Guide (IP Telephony Self-Study): (642-642), 2/e
CCNA Data Center DCICN 640-911 Official Cert Guide (with DVD)