A newly identified network access vulnerability has been found in the OS of legacy IoT devices. Which of the following would best mitigate this vulnerability quickly?

While insurance can provide financial protection against losses resulting from a cyber incident, it does not actively mitigate or address the vulnerability itself. Insurance is a reactive measure rather than a proactive solution, and it does not prevent an attack or limit its consequences.

Patching is a vital practice for addressing known vulnerabilities in software. However, in the case of legacy IoT devices, patching may not always be feasible or quick due to hardware limitations, lack of support, or the complexity of the devices' operating systems. Therefore, while beneficial, it may not provide an immediate solution to the vulnerability in question.

Replacing legacy IoT devices can indeed eliminate vulnerabilities, but it typically requires significant time, resources, and planning. This makes replacement a less viable option for rapid mitigation, especially in environments where immediate action is needed to secure the network.