Question 320
During a planned campus-network change at a public library in Portland, operators discover that the team attempts to stop a rogue DHCP server only by changing DNS server entries. 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 DHCP snooping and rogue DHCP protection requirement at a public library in Portland. The expected result is that authorized lease responses pass from the approved server while a test rogue server on an edge port is blocked. The necessary correction is to enable DHCP snooping where supported and trust only the genuine server-facing uplink, retaining clients as untrusted; a saved configuration alone would not prove it is working. In this case, the observed fault is that the team attempts to stop a rogue DHCP server only by changing DNS server entries.
Incorrect Answers
At a public library in Portland, this measures a different network requirement, Layer-two edge protection and BPDU controls. The case describes that the team attempts to stop a rogue DHCP server only by changing DNS server entries, so accepting this result would leave the primary fault without direct verification.
At a public library in Portland, this would verify LACP aggregation and member consistency, not the failure reported in this scenario. The requested closure criterion instead concerns DHCP snooping and rogue DHCP protection: authorized lease responses pass from the approved server while a test rogue server on an edge port is blocked.
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 the team attempts to stop a rogue DHCP server only by changing DNS server entries has been resolved. The relevant check is the DHCP snooping and rogue DHCP protection outcome.