Cisco Enterprise Network Core Technologies (ENCOR) Practice Exam

The function of the VXLAN (Virtual Extensible LAN) control plane that is correctly identified here is flood and learn. VXLAN relies on a control plane mechanism to facilitate the learning of MAC addresses associated with VMs across different physical networks. When a VM sends a packet, the control plane helps to flood those packets to ensure that they are delivered to the appropriate VM, even if its current location is unknown. This method is part of the broader flooding technique used in traditional Ethernet networks, adapted for the more complex virtual environments allowed by VXLAN.

This approach allows for a scalable and flexible method of traffic management by ensuring that the network can accommodate changes such as VM migrations or dynamic IP address assignments without needing to update routing tables manually. Given that VXLAN is designed to support large-scale virtualized data centers, the flood and learn method enables efficient traffic flows while providing necessary network services dynamically as they evolve.

The other options reflect different aspects of networking. Static routing only involves manually configuring routes, which doesn't generalize to the dynamic nature of native cloud environments like VXLAN. Dynamic IP addressing pertains to DHCP services that allocate IP addresses rather than specifically addressing how Layer 2 traffic is managed. Network segmentation refers to the division of a larger network into smaller, manageable