A Cisco ACI bridge domain and VRF are configured with a default data-plane learning configuration. Which two endpoint attributes are programmed in the leaf switch when receiving traffic? (Choose two.)
A and D are correct:
When dataplane IP address learning is enabled (which is the default setting) for a VRF instance, local and remote MAC addresses are learned using an endpoint-to-endpoint ARP request.
Notes: When dataplane IP address learning is disabled, all the remote IP address entries in the tenant VRF instance are removed. The local IP entries are aged out and, subsequently, will not be re learned through the dataplane, but can still be learned from the control plane.
• When dataplane IP address learning is disabled, already learned local IP endpoints are retained and require control plane refreshes (ARP) to be kept alive (assuming IP aging is also enabled). Dataplane Layer 3 traffic will not keep IP endpoints alive.
https://www.cisco.com/c/en/us/td/docs/dcn/aci/apic/6x/l3-configuration/cisco-apic-layer-3-networking-configuration-guide-60x/dataplane-ip-learning-per-vrf-layer3-config-60x.pdf
The key point is default data-plane learning configuration
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