This book takes a pragmatic, hands-on approach to teaching advanced modern networking concepts from the network administrators point of view. It introduces each new concept in clear, easy-to-understand language, explaining how each technology is used, and reinforcing every idea and technique with practical examples and exercises. Readers will learn how to design, configure, and manage campus networks, connect networks to the Internet, and apply advanced networking technologies. They will learn todays most valuable techniques for designing network infrastructure; configuring routers with RIPv2, OSPF, EIGRP, IS-IS, and BGP; using network management and analysis tools; running IPv6; networking Linux; securing networks, and using VoIP.