What is the primary purpose of a configuration backup for network devices?

• A. To restore a device's previous configuration after hardware changes
• B. To increase throughput
• C. To monitor traffic in real time
• D. To update firmware automatically

Answer: (A)

Restoring a device’s settings after hardware changes or a failure is the primary purpose of a configuration backup. The configuration captures how interfaces are set up, IP addresses, routing protocols, access control lists, SNMP settings, and other policies. Having a saved copy means you can quickly reload those exact settings onto the original or replacement device, bringing it back to a known good state without reconfiguring everything from scratch. This is crucial after hardware swaps, recoveries from misconfigurations, or migrating to new equipment, ensuring rapid service restoration. It’s not about increasing throughput, real-time traffic monitoring, or automatic firmware updates, which involve different processes and tools.