Question 160
Before accepting a secure access rollout, the team finds: A campus has remote wired access switches that send every RADIUS request across a slow WAN to a central node, leading to authentication timeouts during busy mornings. Which maintenance practice most directly limits the same risk?
Explanation
Correct Answer
This safeguard directly addresses policy service node distributed request handling: Validate PSN latency, certificate trust, and per-site RADIUS server ordering before wide access-control rollout. The risk being prevented is: Policy Service Nodes process RADIUS authentication and authorization near access devices; a distant request path increases dependency on WAN delay and reachability. A safeguard aimed at another fault would not control this issue.
Incorrect Answers
The secondary administration persona is a standby policy management node until the appropriate supported promotion or administrative failover workflow makes it primary. “Exercise promotion and restoration procedures, document node status, and avoid simultaneous competing administrative primaries” would remedy that alternative situation, but it would not correct the present issue: policy Service Nodes process RADIUS authentication and authorization near access devices; a distant request path increases dependency on WAN delay and reachability.
“Monitor MnT storage, retention, and logging transport independently of RADIUS availability to avoid silently losing investigation evidence” is the supported response when the Monitoring and Troubleshooting persona handles log collection and reporting, which are distinct from policy administration and live RADIUS policy evaluation. Here the decisive response is “Validate PSN latency, certificate trust, and per-site RADIUS server ordering before wide access-control rollout”, so that different intervention does not meet the stated requirement.
Policy authoring and configuration management are functions of the Policy Administration Node persona, not the policy service persona that handles endpoint requests. “Document persona ownership, restrict administrative access to the PAN, and verify configuration replication after every policy change” applies to that other condition. The reported evidence is a campus has remote wired access switches that send every RADIUS request across a slow WAN to a central node, leading to authentication timeouts during busy mornings; this alternative would address the wrong dependency.