Routing and Switching Essentials Companion Guide is the official supplemental textbook for the Routing and Switching Essentials course in the Cisco®nbsp;Networking Academy®nbsp;CCNA®nbsp;Routing and Switching curriculum. nbsp; This course describes the architecture, components, and operations of routers and switches in a small network. You learn how to configure a router and a switch for basic functionality. By the end of this course, you will be able to configure and troubleshoot routers and switches and resolve common issues with RIPv1, RIPv2, single-area and multi-area OSPF, virtual LANs, and inter-VLAN routing in both IPv4 and IPv6 networks. nbsp; The Companion Guide is designed as a portable desk reference to use anytime, anywhere to reinforce the material from the course and organize your time. nbsp; The book's features help you focus on important concepts to succeed in this course: nbsp; Chapter objectives-Review core concepts by answering the focus questions listed at the beginning of each chapter. Key terms-Refer to the lists of networking vocabulary introduced and highlighted in context in each chapter.nbsp; Glossary-Consult the comprehensive Glossary with more than 200 terms. Summary of Activities and Labs-Maximize your study time with this complete list of all associated practice exercises at the end of each chapter. Check Your Understanding-Evaluate your readiness with the end-of-chapter questions that match the style of questions you see in the online course quizzes. The answer key explains each answer. nbsp; Related Title: Routing and Switching Essentials Lab Manual nbsp; How To-Look for this icon to study the steps you need to learn to perform certain tasks. Interactive Activities-Reinforce your understanding of topics by doing all the exercises from the online course identified throughout the book with this icon. Videos-Watch the videos embedded within the online course. Packet Tracer Activities-Explore and visualize networking concepts using Packet Tracer exercises interspersed throughout the chapters. Hands-on Labs-Work through all thenbsp; course labs and additional Class Activities that are included in the course and published in the separate Lab Manual. nbsp; nbsp;