Question 780
The team at a university campus has corrected this condition: A campus chooses Mist Edge for guest access but accidentally tunnels the production IoT VLAN to the guest DMZ. Which preventive practice BEST addresses the identified mechanism?
Explanation
Correct Answer
Maintain an approved WLAN-to-VLAN-to-tunnel routing matrix. This repeatable safeguard addresses the mechanism—mist Edge forwarding selection must match each WLAN and VLAN's security policy—and reduces the chance that the specific fault recurs.
Incorrect Answers
Include management outage and local traffic tests in campus business-continuity exercises. This protects against another issue—a WAN outage makes the Mist portal unreachable and a technician assumes every locally bridged WLAN should immediately stop forwarding traffic—but is not the most direct prevention for a campus chooses Mist Edge for guest access but accidentally tunnels the production IoT VLAN to the guest DMZ.
Include Mist tunnel-loss fail-closed tests in security acceptance. This protects against another issue—after an Edge tunnel failure, a sensitive corporate WLAN remains active even though policy requires fail-closed tunneled forwarding—but is not the most direct prevention for a campus chooses Mist Edge for guest access but accidentally tunnels the production IoT VLAN to the guest DMZ.
Test Edge failover and scale thresholds before onboarding additional tunneled sites. This protects against another issue—a single Mist Edge appliance is deployed without capacity headroom or failover for a campus that requires continued tunneled WLAN service—but is not the most direct prevention for a campus chooses Mist Edge for guest access but accidentally tunnels the production IoT VLAN to the guest DMZ.