Systems that host critical applications such as database servers and email systems benefit the most from application-aware backups. These systems often require consistent and reliable backups of application-specific data, which can only be achieved through application-aware backup methods. Backing up only file servers or workstations may not capture the necessary application data, leading to incomplete backups and potential data loss.

Option C is correct because role-based access control (RBAC) ensures improved data security by limiting access to sensitive data based on users' roles and responsibilities. This helps prevent unauthorized access and potential data breaches. RBAC is an essential security measure in data protection strategies, especially in environments handling sensitive information. Understanding RBAC's role in data security is crucial for implementing effective access control mechanisms.

Backup retention policies in Commvault define how long backups are retained in the storage infrastructure. They play a crucial role in data management, compliance adherence, and resource optimization by ensuring that data is retained for the required duration based on organizational policies and regulatory requirements.

Commvault facilitates testing and validation of disaster recovery plans through automated testing of backup and restore processes. This helps ensure that backup data is recoverable and meets recovery time objectives (RTOs) and recovery point objectives (RPOs) specified in the disaster recovery plans.

Implementing data masking and anonymization techniques offers several benefits, such as protecting sensitive information, ensuring data privacy compliance, and minimizing the risk of data breaches. These techniques also help organizations manage and secure their data effectively.

The primary purpose of the user interface in Commvault is to facilitate data management tasks. It provides users with a graphical environment to manage backup and recovery operations, configure storage policies, monitor job statuses, and perform other administrative functions. The interface streamlines the interaction with the Commvault software, making it easier for users to navigate and control various aspects of data protection and management.

Commvault's parallel processing feature provides fine-grained control over backup and recovery operations, allowing multiple data streams to be processed simultaneously. This parallelism enhances performance by reducing backup windows and improving data throughput. Understanding parallel processing capabilities in Commvault is essential for optimizing backup and recovery performance in enterprise environments.

Capacity planning involves predicting future resource requirements based on current trends. Monitoring data and workload trends on real-time dashboards helps in understanding usage patterns and anticipating capacity needs.

Commvault ensures the integrity of audit logs by using digital signatures. Digital signatures guarantee the authenticity and integrity of the log entries, making it difficult for unauthorized users to modify them without detection. This security measure is crucial for maintaining the trustworthiness of audit logs in compliance and security contexts.

The purpose of installation and configuration in Commvault is primarily for data protection and management. It involves setting up the system for data backup, recovery, and management operations.