350-401 Question 513
Single answerAn enterprise network requires a secure and scalable solution to connect multiple branch offices over the public internet. The design mandates the use of a single tunnel interface at the headquarters to handle connections from multiple branch offices dynamically. Which technology should be implemented to meet this requirement?
- A
Point-to-Point GRE
- B
Multipoint GRE (mGRE)
- C
IPsec VPN
- D
MPLS L3VPN
Show answer and explanation
Correct answer: B
Explanation
Multipoint GRE (mGRE) is the appropriate technology for this scenario as it allows multiple remote branch offices to connect to a central headquarters using a single tunnel interface. mGRE enables dynamic establishment of tunnels without requiring pre-configuration for each endpoint, which is essential for scalability in large enterprise networks.
- A. Incorrect.
Point-to-Point GRE only supports a single tunnel between two endpoints, which does not meet the requirement for dynamically connecting multiple branch offices.
- B. Correct.
Multipoint GRE (mGRE) supports multiple endpoints using a single tunnel interface, making it a scalable solution for dynamic branch connections.
- C. Incorrect.
IPsec VPN provides encryption and security but does not inherently offer the multipoint capability required for this scenario. It can, however, be used in conjunction with mGRE for secure tunnels.
- D. Incorrect.
MPLS L3VPN is a service provider-based solution that requires provider support and is not suitable for dynamic tunnel connections over the public internet.