Switching, Routing, and Wireless Essentials Companion Guide (CCNAv7) is the official supplemental textbook for the Switching, Routing, and Wireless Essentials course in the Cisco Networking Academy CCNA curriculum. This course describes the architecture, components, and operations of routers and switches in a small network. The Companion Guide is designed as a portable desk reference to use anytime, anywhere to reinforce the material...