Question 310
At a design studio in Berlin, engineers report that legitimate DHCP replies are dropped because the server uplink was never marked trusted. The work affects wireless workstations and video conferences. Which test result most directly confirms the required behavior?
Explanation
Correct Answer
This observation tests the DHCP snooping and rogue DHCP protection requirement at a design studio in Berlin. 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 legitimate DHCP replies are dropped because the server uplink was never marked trusted.
Incorrect Answers
At a design studio in Berlin, 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 design studio in Berlin, the observation may be useful for a separate VLAN trunk and native VLAN consistency test, but it does not establish that legitimate DHCP replies are dropped because the server uplink was never marked trusted has been resolved. The relevant check is the DHCP snooping and rogue DHCP protection outcome.
At a design studio in Berlin, this measures a different network requirement, Layer-two edge protection and BPDU controls. The case describes that legitimate DHCP replies are dropped because the server uplink was never marked trusted, so accepting this result would leave the primary fault without direct verification.