This book helps you figure out whether you need a LAN at all--the author isn't shy about recommending simpler solutions such as printer switches--and then helps you get everything hooked up. Mainly, Lowe describes LANs in an accurate and comprehensive, though somewhat generic, way.
Once it has been determined that you need a network operating system, Lowe describes the characteristics of several good ones (including NetWare 4.2, NetWare 5, Windows NT 4, and LANtastic). He also explains network architectures, cabling systems, and security issues. New to this edition is information on transforming your LAN into an intranet by adapting internal protocols to Internet standards. There's lots of solid information on troubleshooting and optimizing performance too.
Much of the valuable information in Networking for Dummies comes in the form of scenarios. Lowe uses short situations and explains, specifically, what networking hardware and software will be required or beneficial. Find a story that matches your situation and you'll be in business. --David Wall