350-401 Question 120
Select 2A network administrator is tasked with deploying a new branch office and wants to ensure high availability for the WAN connection using Cisco SD-WAN. The branch office will connect to two different ISPs. Which two configurations should the administrator implement to maximize WAN reliability and traffic optimization?
- A
Enable Dynamic Path Selection to monitor link performance and route traffic accordingly.
- B
Configure a single TLOC (Transport Locator) on one of the WAN interfaces for simplified management.
- C
Implement DIA (Direct Internet Access) for local internet breakout and reduced latency for cloud applications.
- D
Use OSPF as the sole routing protocol for the SD-WAN fabric to simplify configuration.
- E
Configure Application-Aware Routing to ensure critical applications use the best performing link.
Show answer and explanation
Correct answers: A, E
Explanation
To maximize WAN reliability and traffic optimization in Cisco SD-WAN, Dynamic Path Selection is critical for monitoring link performance and dynamically adjusting traffic paths based on real-time conditions. Application-Aware Routing further optimizes the solution by ensuring that critical application traffic uses the best available path, enhancing both reliability and performance. These features directly address the goals of high availability and traffic optimization in this scenario.
- A. Correct.
Dynamic Path Selection allows the SD-WAN solution to continuously monitor WAN link performance (such as loss, latency, and jitter) and dynamically route traffic through the best-performing path, improving reliability and optimization.
- B. Incorrect.
Configuring a single TLOC on one interface limits redundancy and load balancing capabilities. For high availability, multiple TLOCs should be configured on different interfaces.
- C. Incorrect.
Direct Internet Access (DIA) can improve performance for certain applications, but it does not directly contribute to WAN reliability or traffic optimization. It is more focused on reducing latency for specific traffic like cloud-based applications.
- D. Incorrect.
Using OSPF as the sole routing protocol may simplify configuration, but it does not leverage SD-WAN's advanced capabilities for traffic optimization and high availability.
- E. Correct.
Application-Aware Routing ensures that traffic for specific applications is sent over the best-performing link based on network conditions, which enhances traffic optimization and reliability for critical applications.