300-420 Question 166
Single answerAn enterprise is planning to connect multiple branch offices to its headquarters using a Metro Ethernet service. The IT team wants a solution that provides high scalability, supports multiple VLANs for segregation, and ensures a point-to-multipoint topology for better management. Which Metro Ethernet service type is most appropriate for this requirement?
- A
E-Line
- B
E-LAN
- C
E-Tree
- D
Dark Fiber
Show answer and explanation
Correct answer: B
Explanation
E-LAN is the most appropriate choice because it provides a point-to-multipoint topology, supports VLANs for traffic segregation, and is scalable for connecting multiple branch offices to the headquarters. This makes it the ideal Metro Ethernet service for the given enterprise requirements.
- A. Incorrect.
E-Line is a point-to-point service and does not inherently support point-to-multipoint communication. It is not the most scalable option for connecting multiple sites.
- B. Correct.
E-LAN is a point-to-multipoint service that supports high scalability and multiple VLANs, making it suitable for connecting multiple branches to headquarters.
- C. Incorrect.
E-Tree is a rooted-multipoint service that is better suited for hierarchical communication, such as a central hub connecting to several isolated branches, but it lacks the full flexibility of E-LAN for branch-to-branch communication.
- D. Incorrect.
Dark Fiber refers to leasing unused fiber optic infrastructure. While it provides raw connectivity, it requires the enterprise to manage its own networking equipment, which does not inherently offer the features described in the scenario.