Question 20
An ISE administrator troubleshoots the following: A small laboratory needs one ISE instance for administration, policy, and monitoring, but engineers propose a multi-node design without a capacity or availability requirement. What is the most suitable solution within these constraints?
Explanation
Correct Answer
Use a supported standalone ISE deployment for the lab while acknowledging its single-node failure exposure. This is appropriate because a standalone node can provide Administration, Policy Service, and Monitoring personas for limited environments; scale and resilience drive distributed designs. It should be verified by this evidence: One laboratory node manages policy, answers test RADIUS requests, and records corresponding live logs.
Incorrect Answers
When one PSN's AAA service is disabled in a test, fresh authentications move to a healthy node instead of timing out. The repeat risk here is different: a test authorization succeeds through the alternate PSN after the first PSN becomes unavailable. A directly relevant preventive control is: Use a supported standalone ISE deployment for the lab while acknowledging its single-node failure exposure.
One laboratory node manages policy, answers test RADIUS requests, and records corresponding live logs. The repeat risk here is different: a test authorization succeeds through the alternate PSN after the first PSN becomes unavailable. A directly relevant preventive control is: Use a supported standalone ISE deployment for the lab while acknowledging its single-node failure exposure.
The PAN manages configuration while PSNs process live network-access authentication; co-locating them creates a common maintenance failure point. The repeat risk here is different: a test authorization succeeds through the alternate PSN after the first PSN becomes unavailable. A directly relevant preventive control is: Use a supported standalone ISE deployment for the lab while acknowledging its single-node failure exposure.