300-420 Question 174
Select 3An enterprise is planning to deploy a branch office in a remote area where traditional broadband connections are unreliable. They want to ensure consistent connectivity for critical applications and quick failover. The design team is considering using 4G/5G technology as part of the WAN architecture. Which two considerations should the team include in the design to optimize 4G/5G usage?
- A
Implement Quality of Service (QoS) to prioritize critical application traffic over 4G/5G links.
- B
Leverage SD-WAN to dynamically manage traffic between 4G/5G links and other WAN links.
- C
Deploy 4G/5G links as the sole WAN connection for all branch traffic.
- D
Use a dual-SIM or multi-SIM solution to ensure connectivity from multiple carriers.
- E
Avoid using encryption to minimize latency over 4G/5G connections.
Show answer and explanation
Correct answers: A, B, D
Explanation
4G/5G technology can be an effective component of an enterprise WAN design, especially for remote or unreliable locations. However, proper design considerations are crucial to optimize its usage. QoS ensures critical traffic gets priority, while SD-WAN provides dynamic traffic management and failover. Additionally, leveraging dual-SIM or multi-SIM solutions adds redundancy and improves reliability. Avoiding encryption is not recommended, as data security is a priority, and modern networks handle encryption efficiently.
- A. Correct.
Implementing QoS ensures that critical application traffic is prioritized, especially when using a bandwidth-limited 4G/5G connection. This is a key consideration for maintaining application performance.
- B. Correct.
SD-WAN enables intelligent traffic management and failover between 4G/5G and other WAN links, optimizing the usage of available links and ensuring reliability.
- C. Incorrect.
While 4G/5G can be used as a primary link, relying solely on it for all branch traffic may not provide the reliability and performance needed for an enterprise environment.
- D. Correct.
Using dual-SIM or multi-SIM solutions allows the enterprise to switch between different carriers, improving redundancy and ensuring connectivity in case one carrier's network is down.
- E. Incorrect.
Encryption should not be avoided as it ensures data security over wireless networks. Modern 4G/5G networks are designed to handle encryption with minimal impact on latency.