Todd Lammle, CompTIA Network+, CCSI, CCNA/CCNP, is the authority on network certification and internetworking. He is a world-renowned author, speaker, trainer, and consultant with more than 100 study guides in print. Todd has more than 30 years of experience working with LANs, WANs, and large licensed and unlicensed wireless networks and currently is working on a Cisco Security expert certification. He’s president and CEO of Todd Lammle, LLC, a network-integration and training firm based in Colorado, Texas, and San Francisco, California. You can reach Todd through his website at www.lammle.com/network±.