Question 20
During a planned campus-network change at a public library in Portland, operators discover that a branch design assumes the 802.1Q VLAN tag and the 802.1X identity exchange serve the same function. The design must preserve staff and visitor wireless access. Which post-change observation is the strongest acceptance evidence?
Explanation
Correct Answer
This observation tests the 802.11, 802.1 and 802.3 protocol boundaries requirement at a public library in Portland. The expected result is that the trace and network design identify the correct standard for the failed behavior without treating wireless association as a wired port login. The necessary correction is to distinguish wireless 802.11 access, wired Ethernet 802.3 transport, and 802.1X port authentication before selecting the troubleshooting layer; a saved configuration alone would not prove it is working. In this case, the observed fault is that a branch design assumes the 802.1Q VLAN tag and the 802.1X identity exchange serve the same function.
Incorrect Answers
At a public library in Portland, the observation may be useful for a separate Ethernet frame, VLAN and IP layer interpretation test, but it does not establish that a branch design assumes the 802.1Q VLAN tag and the 802.1X identity exchange serve the same function has been resolved. The relevant check is the 802.11, 802.1 and 802.3 protocol boundaries outcome.
At a public library in Portland, this measures a different network requirement, BGP peer state and AS compatibility. The case describes that a branch design assumes the 802.1Q VLAN tag and the 802.1X identity exchange serve the same function, 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 802.11, 802.1 and 802.3 protocol boundaries: the trace and network design identify the correct standard for the failed behavior without treating wireless association as a wired port login. In this case, the observed fault is that a branch design assumes the 802.1Q VLAN tag and the 802.1X identity exchange serve the same function.