Which product is a replacement for APIC-EM?

The Cisco DNA Center is Cisco's next-generation software-defined network (SDN) controller; it replaces Cisco's Application Policy Infrastructure Controller - Enterprise Module (APIC-EM) platform. OpenFlow is a protocol used to configure software-defined networks. Cisco Prime Infrastructure (CPI) is a network management software suite, but it does not provide SDN functionality. Cisco Software Defined - Wide Area Network (SD-WAN) is an SDN controller for building WAN connections.