Which of the following is NOT a common backup method?

The correct answer highlights a method that is not typically categorized as a standard backup approach in most environments. Cloud backup, full backup, and differential backup are well-established techniques used to safeguard data.

Cloud backup refers to storing copies of data on an off-site server, often managed by a third-party provider, which allows for remote access and disaster recovery capabilities. A full backup involves creating a complete copy of all the specified data at a given point in time, providing a comprehensive snapshot that can be easily restored. Differential backup, on the other hand, entails backing up only the data that has changed since the last full backup, making it an efficient way to reduce the size of backup files while still ensuring data recovery.

In contrast, SSH (Secure Shell) is primarily a protocol used for secure remote login and command execution on computers, rather than a dedicated method for creating backups. While SSH can be used in conjunction with other commands or scripts to help transfer files securely, it does not serve as a standalone backup method. Therefore, the emphasis on SSH reflects its role in secure communication rather than backup strategy, distinguishing it from the other recognized backup techniques.