Michael Coker, CCNP, MCSE, MCP+I, CNA, is a consultant at Netigy Corporation, a Strategic Alliance Partner with Cisco, where he provides e-business infrastructure planning, design, and implementation. Michael is a member of Netigy's Global Security Practice, focusing on VPN design solutions as well as vulnerability assessments and facilitated risk analysis of customers' e-business architectures. He is the co-author of Interconnecting Cisco Network Devices published by Osborne/McGraw-Hill.