Which of the following statements regarding software and configuration backup is true?

The statement about backup being used to restore network functions in extreme cases is correct because backups play a critical role in a network's disaster recovery and business continuity plans. When a system failure occurs—such as hardware malfunctions, cyberattacks, or other disasters—having a complete backup of software and configurations allows for quick recovery. This means that network functions can be restored to a previous working state, minimizing downtime and interruptions to services.

Typically, backups are performed regularly and include all necessary data to ensure the network can quickly bounce back from an unforeseen incident. They serve as an essential safety net, allowing businesses to maintain operations and protect data integrity under adverse conditions.

In contrast, the other statements reflect misunderstandings about backup practices. For example, software versions should be backed up regularly, especially when changes or updates are made. Licenses are typically tied to specific hardware or software and should be archived to ensure compliance in case of system resets. Configuration files, on the other hand, need to be continuously updated and backed up every time changes are made to ensure that the latest configurations can be restored if needed.