200-301 · Question #546
Which PoE mode enables powered-device detection and guarantees power when the device is detected?
The correct answer is B. static. Static PoE mode ensures powered device detection and guarantees power by reserving a specified amount from the switch's power budget.
Question
Options
- Adynamic
- Bstatic
- Cactive
- Dauto
How the community answered
(19 responses)- A5% (1)
- B89% (17)
- D5% (1)
Why each option
Static PoE mode ensures powered device detection and guarantees power by reserving a specified amount from the switch's power budget.
Dynamic PoE (often `auto`) allocates power on demand and allows for power oversubscription, which does not inherently guarantee a reserved power level.
In static PoE mode, the Power Sourcing Equipment (PSE) first performs powered-device detection. Upon detection, it then reserves and guarantees to supply a pre-configured maximum amount of power to that port from its total power budget, ensuring consistent power availability for the detected device.
Concept tested: PoE power allocation modes
Source: https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3560/software/release/12_2_55_se/configuration/guide/scg/swpoe.html#wp1021481
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