What does 'high availability' mean in relation to SonicWall devices?

High availability in relation to SonicWall devices refers to a configuration that ensures continuous operation by automatically switching to a backup unit if the primary fails. This capability is crucial for maintaining network uptime and reliability, especially in environments where uninterrupted service is essential. The high availability setup typically involves the deployment of two units in a redundant configuration, so that if one unit experiences a failure or requires maintenance, the other can immediately take over its functions. This seamless transition minimizes downtime and helps maintain consistent network performance.

Upon reviewing the other options, it's clear they address different functionalities. For instance, increasing internet bandwidth is a separate concern that deals with enhancing connection speed rather than system resiliency. Likewise, data encryption during transmission relates to protecting data integrity and privacy, which is also distinct from high availability. Finally, managing user permissions concerns access control and security within the network, a topic that does not pertain to the concept of ongoing operational continuity linked to high availability.