How does SonicWall implement high availability?

SonicWall implements high availability primarily through clustering multiple devices for uptime and reliability. This approach allows multiple SonicWall devices to work together as a single system to provide continuous service, even in the event that one device experiences a failure. By using clustering, the configuration and session data can be synchronized across the devices, enabling a seamless transition for users without noticeable downtime. This redundancy ensures that network services remain available and minimizes the risk of service interruption.

In contrast, creating multiple systems that run independently would not provide the same level of reliability and high availability, as there wouldn't be synchronization between the devices. A single powerful server, while potentially capable of handling a significant amount of traffic, does not provide redundancy and is therefore vulnerable to failure. Lastly, regular backups of device configurations are crucial for disaster recovery, but they do not actively contribute to high availability during normal operation or provide immediate failover capabilities in case of a device failure.