Switching Basics and Intermediate Routing

This book is "the official supplemental textbook for v3.1.1 of the CCNA 3 course in the Cisco Networking Academy Program. The author has rewritten the 'companion guide' to provide a fresh, complementary perspective on the online course content. The book covers all the topics in the course yet provides additional examples and alternative approaches to individual topics - all to aid the learning process and lock in your understanding of basic networking concepts and technologies." - back cover.