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 basic WAN serial Understand and apply the wireless LAN (WLAN) Reduce the concept of network security threats and secure network devices Configure static routes and RIPv2 Connect a small office to the Internet WRITTEN BY CCNA / CCENT Experts! Michael Valentine has been in the IT field for 12 years, focusing on the design and implementation of the network.