The official self-study test preparation guide for the Cisco CCNA INTRO exam 640-821 Master CCNA INTRO exam topics, including: TCP/IP and OSI networking models Operating Cisco routers and LAN switches LAN switching basics, VLANs, and Trunking IP addressing and subnetting Basic router configuration and operation Discovering information about an IP network Dynamic routing protocols Analog modems, PAP/CHAP, DSL and Cable CCNA INTRO Exam Certification Guide is a best-of-breed Cisco exam study guide that has been completely updated to focus specifically on the objectives for the CCNA INTRO exam. Senior instructor and best-selling author Wendell Odom shares preparation hints and test-taking tips to help you identify areas of weakness and improve both you...