Question 360
At Main Data Center, an access switch shows increasing runts and drops while the user complains of unstable wired access. Which preventive control is most relevant to this scenario over time?
Explanation
Correct Answer
For Main Data Center, the decisive mechanism is Physical-link errors. Layer 1/2 corruption can degrade packets even though link status remains up. Retain spare supported optics and baseline error counters before maintenance is an enduring limitation on the operational risk, not simply a one-time passing test.
Incorrect Answers
This is relevant to Routed blackhole, where route presence alone does not prove usable bidirectional forwarding In the Main Data Center case, A precaution for another failure mode is not the enduring boundary needed here. The specific mechanism is layer 1/2 corruption can degrade packets even though link status remains up
This is relevant to STP convergence fault, where sTP role and root election determine the alternate Layer 2 forwarding path In the Main Data Center case, A precaution for another failure mode is not the enduring boundary needed here. The specific mechanism is layer 1/2 corruption can degrade packets even though link status remains up
This is relevant to Wrong VLAN mapping, where wLAN-to-wired mapping errors can appear as a DHCP or authorization defect In the Main Data Center case, A precaution for another failure mode is not the enduring boundary needed here. The specific mechanism is layer 1/2 corruption can degrade packets even though link status remains up