Mark R. Culpepper is Product Marketing Manager of E-commerce services at Digital Island, Inc. Formerly a Senior Systems Engineer at Cisco Systems, Inc., he was responsible for designing, implementing, and troubleshooting network solutions for large corporate accounts. He received his B.S.F.S. in International Economics from Georgetown University in 1991, is a Cisco Certified Internetwork Engineer (CCIE), and has extensive experience in the day-to-day workings of large corporate networks. In addition to teaching corporate sales teams the basics of internetworking and the OSI model, Mark is an avid surfer of the northern Californian coastline as well as the Internet.