Which tool is commonly used for data backup?

The commonly used tool for data backup is backup software. This type of software is specifically designed to create copies of data to safeguard it against loss or corruption. Backup software automates the process of copying files to different storage locations, such as external hard drives, cloud storage, or other backup media, ensuring that data can be restored in the event of hardware failure, accidental deletion, or other disasters.

Firewall, while a crucial security tool, primarily focuses on network security measures to control incoming and outgoing traffic based on predetermined security rules. It does not facilitate data backup.

A database management system (DBMS) is involved in storing and managing data in structured formats, allowing for efficient data handling and retrieval. Although some DBMSs might include backup capabilities, they are not primarily designed for data recovery tasks like dedicated backup software.

Encryption software serves the purpose of securing data by converting it into a coded format that can only be deciphered with the correct decryption key. While this is important for protecting the confidentiality of data, it does not facilitate the actual process of creating backups. Hence, backup software remains the dedicated tool for ensuring data longevity and recoverability.