Todd Lammle is a world renowned Cisco authority with over fifteen years experience with LANs and WANs. He is president of GlobalNet Systems, a network integration and training firm based in Colorado. Andy Barkl, Andy Barkl, CCDP, MCT, CISSP, Server+, has over 18 years of experience in IT. He's the owner of MCT & Associates LLC, a technical training and consulting firm in Phoenix. He is an online editor and regular contributor for MCPMag.com, TCPMag.com, and CertCities.com.