300-420 Question 173
Select 3A retail company wants to deploy a backup WAN solution for their branches that ensures reliable connectivity in case of primary WAN failure and supports high-speed data transfer for real-time applications. The IT team is considering using 4G/5G technology for this purpose. Which of the following design considerations should they prioritize when implementing a 4G/5G backup solution?
- A
Ensure the cellular router supports dual SIM cards for carrier redundancy
- B
Optimize the network for high latency and low bandwidth associated with 4G/5G
- C
Implement Quality of Service (QoS) policies to prioritize critical traffic during failover
- D
Design for seamless integration with SD-WAN to enable automated failover and monitoring
- E
Deploy a firewall at each branch to block non-critical traffic during failover
Show answer and explanation
Correct answers: A, C, D
Explanation
When designing a 4G/5G backup WAN solution, the focus should be on ensuring reliability, performance, and seamless integration with existing network infrastructure. Features like dual SIM support, QoS policies, and SD-WAN integration address these needs effectively. Security measures, while important, are not specific to the 4G/5G design requirements in this context.
- A. Correct.
Ensuring the cellular router supports dual SIM cards allows for carrier redundancy, which improves reliability during network outages.
- B. Incorrect.
Modern 4G/5G networks offer low latency and high bandwidth; this option is incorrect as it assumes outdated characteristics of cellular technology.
- C. Correct.
Quality of Service (QoS) policies are critical for prioritizing real-time applications such as voice and video during failover, ensuring better performance.
- D. Correct.
Integration with SD-WAN enables automated failover, centralized monitoring, and efficient utilization of the 4G/5G backup solution.
- E. Incorrect.
While deploying a firewall may enhance security, it is not a primary design consideration for implementing a 4G/5G backup solution.