Control Plane Protocol for Endpoint Mapping and Resolution

D.

In a Cisco SD-Access fabric, the control plane protocol used for mapping and resolving endpoints is LISP (Locator/ID Separation Protocol).

LISP is a routing protocol that separates the location and identity of IP addresses. In an SD-Access fabric, LISP is used to map the endpoint IP address to the corresponding physical location, such as a switch or access point. This mapping is stored in the LISP Mapping System (LMS).

When an endpoint sends traffic in the fabric, the LISP control plane is used to determine the location of the destination endpoint. This allows the fabric to make forwarding decisions based on the endpoint's physical location, rather than its IP address.

SXP (Security Exchange Protocol) is used for sharing endpoint location information between different domains in the fabric. It is not used for endpoint mapping and resolving.

VXLAN (Virtual Extensible LAN) is a tunneling protocol used for overlay network virtualization. While it is used in SD-Access to encapsulate traffic between endpoints, it is not used for endpoint mapping and resolving.

DHCP (Dynamic Host Configuration Protocol) is used for assigning IP addresses and other network configuration information to endpoints. It is not used for endpoint mapping and resolving in an SD-Access fabric.

Therefore, the correct answer is D. LISP.