300-415 Question 105
Single answerAn enterprise is deploying Cisco SD-WAN and has decided to use a hybrid WAN architecture with both MPLS and broadband internet connections. The IT team wants to ensure secure and scalable connectivity across branch offices while maintaining redundancy. Which WAN Edge deployment option would best suit this requirement?
- A
Single WAN Edge device in each branch office with MPLS as the primary link and broadband as backup
- B
Dual WAN Edge devices in each branch office, each connected to both MPLS and broadband links
- C
Single WAN Edge device in each branch office with only broadband internet as the transport
- D
Dual WAN Edge devices in each branch office, each connected to a single transport link (one to MPLS, one to broadband)
Show answer and explanation
Correct answer: B
Explanation
In a hybrid WAN deployment, using dual WAN Edge devices at each branch office with both MPLS and broadband connections ensures redundancy, scalability, and transport flexibility. This setup supports load balancing, failover, and secure connectivity across different transport types, meeting the enterprise's requirements effectively.
- A. Incorrect.
This option does not provide sufficient redundancy or scalability, as a single WAN Edge device creates a single point of failure and limits the ability to actively use both transport links for load balancing or failover.
- B. Correct.
This option is the best choice for redundancy and scalability. By having dual WAN Edge devices, each connected to both MPLS and broadband, the solution ensures high availability, load balancing, and transport independence. It also avoids single points of failure.
- C. Incorrect.
This option sacrifices redundancy and scalability by relying on a single WAN Edge device and a single transport type, which does not align with the requirements for secure and scalable connectivity.
- D. Incorrect.
While this option provides redundancy at the device level, it lacks flexibility and scalability because each WAN Edge device is limited to a single transport, preventing efficient use of both links for load balancing or failover.