What is synchronized between HA members in a cluster?

In a High Availability (HA) cluster, synchronization between members is crucial for maintaining redundancy and ensuring that both devices operate seamlessly in case of a failover. The correct option indicates that both system and configuration settings, as well as logs and data, are synchronized among cluster members.

This synchronization mechanism enables HA members to have a consistent view of their configuration, which includes network settings, policies, and any other parameters that impact the device's operation and security posture. Additionally, logs and real-time data are shared among members to ensure that they can respond effectively to incidents and maintain a synchronized state of awareness concerning network activity. This capability is vital for troubleshooting and auditing, as it allows for a complete record of events and actions even if one member goes offline.

In contrast, other choices focus on limited aspects of synchronization. For example, user credentials alone would not provide the necessary holistic view of the operations within the cluster, nor would it ensure that all critical system settings are applied consistently. Similarly, device hardware configurations are typically not synchronized in the same manner because hardware aspects remain fundamentally distinct to each member, allowing each HA unit to maintain its specific physical attributes while still functioning as part of a collective system. Thus, the comprehensive synchronization of both system settings and log data ensures