300-420 Question 165
Single answerAn enterprise is designing a WAN solution to connect multiple branch offices to its data center using Metro Ethernet. The organization requires high bandwidth and scalability while maintaining simplicity in network configuration and routing. Which Metro Ethernet topology is most suitable for this requirement?
- A
Point-to-Point (E-Line)
- B
Hub-and-Spoke
- C
Full Mesh
- D
Multipoint-to-Multipoint (E-LAN)
Show answer and explanation
Correct answer: D
Explanation
For an enterprise requiring high bandwidth and scalability while keeping configuration and routing simple, Multipoint-to-Multipoint (E-LAN) is the best topology. It enables seamless communication between multiple branches, avoids bottlenecks, and is easier to manage than a Full Mesh topology. Point-to-Point and Hub-and-Spoke are less scalable and may not fully meet the organization's requirements.
- A. Incorrect.
Point-to-Point (E-Line) provides a direct connection between two sites. While it is simple, it does not offer the scalability required for multiple branches or the ability to connect more than two locations easily.
- B. Incorrect.
Hub-and-Spoke topology involves a central hub connecting to multiple spoke sites. This topology may become a bottleneck at the hub and lacks the scalability and redundancy needed for high bandwidth and multiple branches.
- C. Incorrect.
Full Mesh provides direct connections between all sites, ensuring redundancy and high availability. However, it is complex to configure and manage, especially as the number of sites grows.
- D. Correct.
Multipoint-to-Multipoint (E-LAN) allows all sites to connect to each other over a shared Ethernet topology. It is scalable, supports high bandwidth, and simplifies routing configurations, making it ideal for an organization with multiple branches.