正解:C
VTEP, or VXLAN Tunnel Endpoint, is the component in VXLAN architecture responsible for encapsulating and decapsulating Ethernet frames. It acts as the interface between the overlay network where VXLAN operates and the underlay network, which is typically the physical network infrastructure. When encapsulating, the VTEP adds VXLAN headers to the original Ethernet frame, creating a VXLAN packet that can be transmitted over the underlay network. Upon reaching the destination VTEP, the process is reversed, and the VXLAN headers are removed to recover the original Ethernet frame for delivery within the destination network segment.
References:
* Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR) source book
* Cisco's official training and certification resources on VXLAN and VTEP functionalities.