This comprehensive reference provides a foundation for understanding and implementing contemporary networking technologies. With Internetworking Technologies Handbook, Third Edition, you will master terms, concepts, technologies, and devices that are used in today's networking industry. You will learn how to incorporate networking technologies into a LAN/WAN environment, as well as how to apply the OSI Reference Model to categorize protocols, technologies, and devices. Readers new to internetworking will gain a strong foundation of knowledge vital to achieving CCNA certification. This resourceful handbook covers emerging technologies such as Virtual Private Networks, Multi-Service Access, and Quality of Service networking. New to the Third Edition is coverage of DSL, cable, and wireless communications. The third edition of the best-selling ride represents a collaborative effort by many networking and documentation experts. With more than 100,000 copies in print, Internetworking Technologies Handbook remains an essential reference for every network professional.