H12-311_V3.0 · Question #116
If the PoE function is enabled on the switch, traditional devices cannot be connected to these interfaces.
The correct answer is B. False. Option B is correct because PoE (Power over Ethernet) is fully backward compatible with standard Ethernet devices. When PoE is enabled on a switch port, the switch first performs a detection process to determine whether the connected device is PoE-capable; if it is not, no…
Question
If the PoE function is enabled on the switch, traditional devices cannot be connected to these interfaces.
Options
- ATrue
- BFalse
How the community answered
(70 responses)- A17% (12)
- B83% (58)
Explanation
Option B is correct because PoE (Power over Ethernet) is fully backward compatible with standard Ethernet devices. When PoE is enabled on a switch port, the switch first performs a detection process to determine whether the connected device is PoE-capable; if it is not, no power is delivered, and the port functions as a normal data connection. Traditional devices such as PCs or printers can connect to PoE-enabled ports without any issue - they simply will not receive or use the electrical power.
Option A is incorrect because it assumes PoE creates an incompatibility, which it does not; the standard was specifically designed to coexist with non-PoE devices on the same infrastructure.
Memory tip: Think of PoE like a power strip with a USB charging port - plugging in a device that does not need USB power does not stop it from working; it just ignores the extra capability.
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