Function of VTEP in VXLAN

C.

VTEP (Virtual Tunnel End Point) is a critical component of VXLAN (Virtual Extensible LAN), which is an overlay network technology used to extend Layer 2 Ethernet segments over an IP-based network. The VTEP function is responsible for encapsulating and de-encapsulating VXLAN Ethernet frames as they traverse the network.

Specifically, the VTEP encapsulates the original Ethernet frame with a VXLAN header, which includes a 24-bit VXLAN Network Identifier (VNI). This VNI is used to identify the VXLAN segment to which the Ethernet frame belongs. The VTEP then tunnels the encapsulated frame over an IP network using UDP (User Datagram Protocol) as the transport protocol.

On the receiving end, the VTEP on the remote side de-encapsulates the VXLAN Ethernet frame, removes the VXLAN header, and forwards the original Ethernet frame to the appropriate destination. This process enables the extension of Layer 2 Ethernet segments over Layer 3 IP networks, which is essential for building large-scale multi-tenant cloud environments.

Therefore, the correct answer to the given question is C: encapsulating and de-encapsulating VXLAN Ethernet frames. Option A and D are not valid actions of VTEP since it does not perform tunneling between IPv4 and IPv6 VXLANs, and instead, it tunnels Ethernet frames over IP networks. Option B is also not a valid function of VTEP, as it does not deal with encrypted communication on a local VXLAN Ethernet segment.