A network administrator has been tasked to oversee the updating of the company's firewall firmware. Given the critical nature of this device for network security, which of the following plans is essential to have prepared before the update commences in order to ensure that operations can be returned to their original state without significant loss of functionality if the update proves unstable?
The correct answer is a rollback plan, which is specifically designed to allow an IT system to be returned to a previous, stable state following the unsuccessful application of updates or changes without causing significant service disruption. This is vital, especially for critical systems such as a firewall. A change management policy describes the overall approach and includes the need for such a plan but does not serve as the plan itself. An escalation plan is focused on increasing resources or attention in response to problems rather than reverting changes. Lastly, a contingency plan is a broader approach for any unexpected events and may not be as specific or detailed for reverting a particular change.
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Why is a rollback plan crucial before a firmware update?