350-401 Question 113
Single answerAn enterprise network is expanding its data center infrastructure and decides to implement VXLAN to address scalability and segmentation challenges. Which component in a VXLAN architecture is responsible for encapsulating and decapsulating Layer 2 frames into VXLAN packets for transport over Layer 3 networks?
- A
VXLAN Tunnel Endpoint (VTEP)
- B
Spanning Tree Protocol (STP) Bridge
- C
Border Gateway Protocol (BGP) Speaker
- D
VXLAN Gateway
Show answer and explanation
Correct answer: A
Explanation
In a VXLAN network, the VXLAN Tunnel Endpoint (VTEP) is the critical component that encapsulates Layer 2 Ethernet frames with VXLAN headers for transport across a Layer 3 underlay network. It also decapsulates VXLAN packets upon reception. This allows VXLAN to extend Layer 2 networks over a Layer 3 infrastructure. While other components like VXLAN Gateway or BGP may play roles in the overall network, the VTEP is specifically responsible for the encapsulation and decapsulation processes.
- A. Correct.
A VXLAN Tunnel Endpoint (VTEP) is responsible for encapsulating Layer 2 frames into VXLAN packets and decapsulating VXLAN packets back to Layer 2 frames for communication over a Layer 3 network.
- B. Incorrect.
A Spanning Tree Protocol (STP) Bridge is unrelated to VXLAN and is used to prevent layer 2 loops in traditional Ethernet networks.
- C. Incorrect.
A Border Gateway Protocol (BGP) Speaker is used for inter-domain routing and has no role in VXLAN encapsulation/decapsulation.
- D. Incorrect.
A VXLAN Gateway is typically used to connect VXLAN networks with non-VXLAN networks, but it does not perform the primary encapsulation and decapsulation within the VXLAN architecture.