300-420 Question 184
Single answerAn organization is deploying a Dynamic Multipoint VPN (DMVPN) to facilitate secure communication between multiple branch offices and the central hub. The network engineer wants to ensure that spoke-to-spoke communication is optimized by reducing latency and bandwidth usage through direct tunnels. Which DMVPN phase should the network engineer implement to achieve this requirement?
- A
DMVPN Phase 1
- B
DMVPN Phase 2
- C
DMVPN Phase 3
- D
DMVPN Phase 4
Show answer and explanation
Correct answer: B
Explanation
DMVPN Phase 2 is the correct choice as it allows for the establishment of direct tunnels between spokes, enabling optimized spoke-to-spoke communication. This eliminates the need to route traffic through the hub, reducing latency and improving bandwidth efficiency. Phase 1 does not support spoke-to-spoke communication, and Phase 3 still involves the hub for spoke-to-spoke traffic redirection.
- A. Incorrect.
DMVPN Phase 1 only supports spoke-to-hub communication. Spoke-to-spoke communication is not possible in this phase, making it unsuitable for this scenario.
- B. Correct.
DMVPN Phase 2 allows spoke-to-spoke communication by establishing direct tunnels between spokes without routing traffic through the hub. This optimizes latency and bandwidth usage, meeting the organization's requirements.
- C. Incorrect.
DMVPN Phase 3 introduces enhancements for scalability and routing efficiency but still relies on the hub to assist in spoke-to-spoke communication, which may not fully optimize latency and bandwidth.
- D. Incorrect.
There is no DMVPN Phase 4. This option is not valid.