CCNA INTRO: Introduction to Cisco Networking Technologies Study Guide: Exam 640-821

Todd Lammle, CCSI, CCNA/CCNP/CCSP, MCSE, CEH/CHFI, FCC RF Licensed, is the authority on Cisco Certification internetworking. He is a world-renowned author, speaker, trainer, and consultant. Todd has over 25 years of experience working with LANs, WANs, and large Wireless networks. He is president of GlobalNet Training, Inc, a network integration and training firm based in Dallas. You can reach Todd through his forum at www.lammle.com.