Covers the architecture, components, operations, and security to scale for large, complex networks, including wide area network (WAN) technologies and quality of service (QoS) concepts. Emphasizes network security concepts and introduces network virtualization and automation. Covers concepts and configuration of OSPFv2, IPv4 ACLs, NAT, DHCP, and SLAAC on enterprise network devices. Students learn how application programming interfaces (API) and configuration management tools enable network automation. This is one of three classes that prepare students for the CCNA exam. May be offered in a distance-learning format.