An administrator wants to limit the number of VDOMs that can be created on a FortiGate. What should the administrator configure?
The 'max-vdom' parameter in system global sets the maximum number of VDOMs.
Why this answer
The 'max-vdom' option under 'config system global' directly limits the number of VDOMs that can be created on a FortiGate. This setting enforces a hard cap on the total VDOM count, regardless of licensing or administrative roles. By default, the value is set to 10 on most models, but it can be increased up to the maximum supported by the platform or license.
Exam trap
The trap here is that candidates often confuse the FortiGate's local 'max-vdom' limit with FortiManager licensing or the 'vdom-admin' toggle, mistakenly thinking those options control the creation cap when they actually address management scope or administrative access.
How to eliminate wrong answers
Option A is wrong because deleting unused VDOMs reduces the current count but does not prevent future creation of additional VDOMs; it is a reactive action, not a proactive limit. Option C is wrong because the VDOM license on FortiManager controls the number of VDOMs that can be managed centrally, but it does not enforce a creation limit on the FortiGate itself; the FortiGate's local 'max-vdom' setting is independent of FortiManager licensing. Option D is wrong because the 'vdom-admin' option enables or disables VDOM administration mode (allowing VDOM configuration), but it does not impose any numerical limit on how many VDOMs can be created.