Question 220
During a planned campus-network change at a public library in Portland, operators discover that an engineer believes an SVI IP address automatically configures every required VLAN tag on a trunk. The design must preserve staff and visitor wireless access. Which test result most directly confirms the required behavior?
Explanation
Correct Answer
This observation tests the VLAN trunk and native VLAN consistency requirement at a public library in Portland. The expected result is that tagged and untagged test frames enter their intended VLANs on both ends and unauthorized VLANs are not carried. The necessary correction is to match the switchport tagging, native VLAN and allowed VLAN list on each end of the campus trunk; a saved configuration alone would not prove it is working. In this case, the observed fault is that an engineer believes an SVI IP address automatically configures every required VLAN tag on a trunk.
Incorrect Answers
At a public library in Portland, the observation may be useful for a separate Ingress ACL enforcement and least privilege test, but it does not establish that an engineer believes an SVI IP address automatically configures every required VLAN tag on a trunk has been resolved. The relevant check is the VLAN trunk and native VLAN consistency outcome.
At a public library in Portland, this measures a different network requirement, RSTP root election and loop prevention. The case describes that an engineer believes an SVI IP address automatically configures every required VLAN tag on a trunk, so accepting this result would leave the primary fault without direct verification.
At a public library in Portland, this would verify Layer-two edge protection and BPDU controls, not the failure reported in this scenario. The requested closure criterion instead concerns VLAN trunk and native VLAN consistency: tagged and untagged test frames enter their intended VLANs on both ends and unauthorized VLANs are not carried.