In this book, you learn how to: Develop perfect fluency in subnetting Understand the OSI model and the Cisco three-layer hierarchical model Connect Cisco equipment, make initial configurations, and connect to other devices to build a network Configure Cisco routers and back up and restore your Cisco IOS Software configurations Implement, verify, and troubleshoot a small, switched network Configure and verify a basic WAN serial connection Understand and apply wireless LAN (WLAN) concepts Mitigate network security threats and secure network devices Configure static routes and RIPv2 Connect a small office to the Internet