An introduction to local area networks, this book is intended to prepare a student to take and pass the CompTIA's Network+ exam. Starting with the OSI model, going through the popular network protocols, technology, and services, this book covers the three most popular network operating systems—Microsoft Windows Servers, Novell NetWare and Linux—so that students can have an introduction to all three and have the ability to compare and contrast them. With an emphasis on troubleshooting throughout, topic coverage is in-depth.