Introduction to networks and networking concepts -- Network design essentials -- Networking media -- Network interface cards -- Making networks work -- Network communications and protocols -- Network architectures -- Simple network operations -- Understanding complex networks -- Introduction to network security -- Supporting a small business network -- Network administration and support -- Enterprise and wide area networks -- Solving network problems -- App. A. Common networking standards and older technologies -- App. B. Planning and implementing networks -- App. C. Network troubleshooting guide -- App. D. Networking resources, online and offline.