THOMAS MAUFER, published author of three networking books for Prentice-Hall, is the Director of Technical Marketing for Mu Dynamics. He has managed local-, metropolitan- and wide-area networks at NASA/GSFC, participated in the InteropNet Network Operations Center Team, and worked in Silicon Valley designing and building all types of Ethernet- and IP-based networking products, from semiconductors to switches and routers, now including test equipment with Mu. Much of his career has involved network security, both in products and in protocols, and he has been fortunate to have spent many years contributing to IEEE and IETF standards, including IEEE 802.11e/g/i, IEEE 802.1X, IPsec, IPv6, OSPF, and others. As of this writing, he has contributed to 30 United States patents. When he's not helping to design protocols or the products that implement or test them, he's relaxing with a single-malt Scotch.