問題文
A plant has identified its unmanaged devices and now wants rules that limit what each class of device may reach. What has to be in place for those rules to keep working as devices are replaced?
選択肢
- A static address reservation for every device so that replacements always receive the address of the device they replace, which keeps the existing address-based rules valid without any further work.
- A separate zone for each device, so that the rule set never has to change when one is replaced, because the replacement is simply cabled into the zone that the old unit occupied.
- A manual review after each replacement, because attribute-based rules cannot be written for unmanaged devices and the address of the new unit therefore has to be entered by hand.
- Rules that match on the device attributes rather than on the addresses, so that a replacement device with a new address is covered as soon as it is profiled the same way.