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Steve Kalman, CISSP, is the managing director for Esquire Micro Consultants, through which he teaches eight courses on Cisco routers, Microsoft Windows, and networking, telecom, and security topics for Learning Tree International. He is also the technical editor for three of those courses. Steve has also developed or edited more than a dozen CBT modules on networking, Cisco routers, and Microsoft Windows topics. In addition to teaching and course development, Steve is a network design consultant. Steve has worked as a programmer, manager, and consultant for companies of all sizes, both for-profit and nonprofit.