300-415 · Question #111
300-415 Question #111: Real Exam Question with Answer & Explanation
The correct answer is D: The default level is used for the access point. Auto mode in PoE allows a switch to dynamically negotiate and allocate the appropriate power level to a connected access point, often defaulting to a standard power class if specific requirements are not advertised, which simplifies deployment and avoids manual configuration erro
Question
Options
- AIt detects the device is a powered device
- BAll four pairs of the cable are used
- CPower policing is enabled at the same time
- DThe default level is used for the access point
Explanation
Auto mode in PoE allows a switch to dynamically negotiate and allocate the appropriate power level to a connected access point, often defaulting to a standard power class if specific requirements are not advertised, which simplifies deployment and avoids manual configuration errors.
Common mistakes.
- A. The detection of a powered device is a fundamental step of PoE that occurs regardless of whether auto or static power allocation mode is configured.
- B. The use of all four cable pairs for power delivery is a characteristic of specific higher power PoE standards (e.g., PoE+ or 4PPoE), not an exclusive advantage of the auto power allocation mode.
- C. Power policing, while a feature of some PoE switches for budgeting, is not inherently enabled by or an exclusive advantage of auto mode; auto mode primarily focuses on dynamic power allocation based on negotiation.
Concept tested. PoE auto vs. static power allocation
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