Introduction to networks companion guide is the official supplemental textbook for the introduction to networks course in the cisco networking academy ccna curriculum the course introduces the architecture protocols functions components and models of the internet and computer networks. Vi introduction to networks companion guide contents introduction xxvi chapter 1 exploring the network 1 objectives 1 key terms 1 introduction 1011 3 globally connected 11 4 networking today 111 4 networks in our daily lives 1111 4 technology then and now 1112 5 the global community 1113 6 networks support the way we learn 1114 7. Introduction to networks companion guide is the official supplemental textbook for the introduction to networks course in the ciscor networking academyr ccnar routing and switching curriculum the course introduces the architecture structure functions components and models of the internet and computer networks. Introduction introduction to networks companion guide ccnav7 is the official supplemental textbook for the cisco network academy ccna introduction to networks version 7 course cisco networking academy is a comprehensive program that delivers information technology skills to students around the world