This course conforms to the fourth of four courses leading to the Cisco Certified Network Associate (CCNA) designation. It discusses the WAN technologies and network services required by converged applications in a complex network. The course enables you to understand the selection criteria of network devices and WAN technologies to meet network requirements. You will learn how to configure and troubleshoot network devices and resolve common issues with data link protocols. You will also develop the knowledge and skills needed to implement IPSec and virtual private network (VPN) operations in a complex network.