About the Author

Mark Lewis, CCIE No. 6280, is technical director of MJL Network Solutions (www.mjlnet.com), a leading provider of internetworking solutions that focuses on helping service and enterprise provider customers to implement cutting edge technologies, deploy security solutions, and optimize their networks, as well as providing them with advanced training. Mark specializes in VPN technologies and has many years of experience designing, implementing, and troubleshooting IP networks. He is also an MCSE+I and a certified Cisco Systems instructor. Mark can be contacted at mark@mjlnet.com.