300-420 Question 148
Single answerAn enterprise is designing its WAN infrastructure to support multiple branch locations. The design must ensure optimal use of available bandwidth, prioritize critical applications, and provide resiliency in case of link failures. Which technology or feature is best suited to meet these requirements?
- A
Policy-Based Routing (PBR)
- B
Dynamic Multipoint VPN (DMVPN)
- C
Software-Defined WAN (SD-WAN)
- D
Multiprotocol Label Switching (MPLS)
Show answer and explanation
Correct answer: C
Explanation
SD-WAN is specifically designed to address modern enterprise WAN requirements, including centralized traffic management, dynamic path selection for resiliency, application-aware routing, and efficient use of available bandwidth. While other options provide certain benefits, SD-WAN is the most comprehensive solution for the stated scenario.
- A. Incorrect.
Policy-Based Routing (PBR) allows traffic to be routed based on policies, but it does not provide advanced features like traffic prioritization or resiliency as required in this scenario.
- B. Incorrect.
Dynamic Multipoint VPN (DMVPN) is useful for dynamic site-to-site connectivity, but it lacks built-in application prioritization and bandwidth optimization capabilities.
- C. Correct.
Software-Defined WAN (SD-WAN) is the best choice as it provides centralized control for bandwidth optimization, application-aware routing, and resiliency through dynamic path selection.
- D. Incorrect.
Multiprotocol Label Switching (MPLS) offers reliable connectivity and QoS but lacks the flexibility and advanced features of SD-WAN, such as centralized management and dynamic path selection.