210-065 · Question #439
Which is an industry standard used for powering devices using an Ethernet cable?
The correct answer is C. 802.3af. IEEE 802.3af is the ratified industry standard defining Power over Ethernet (PoE), enabling electrical power delivery to network devices over standard Ethernet cabling.
Question
Which is an industry standard used for powering devices using an Ethernet cable?
Options
- A802.1Q
- BCisco Inline Power
- C802.3af
- Dlocal power brick
How the community answered
(24 responses)- A4% (1)
- B8% (2)
- C88% (21)
Why each option
IEEE 802.3af is the ratified industry standard defining Power over Ethernet (PoE), enabling electrical power delivery to network devices over standard Ethernet cabling.
IEEE 802.1Q defines VLAN tagging for Ethernet frames to enable traffic segmentation across virtual networks; it has no role in delivering electrical power over cable.
Cisco Inline Power is a Cisco-proprietary pre-standard predecessor to 802.3af that only works with compatible Cisco hardware; it is not a ratified industry standard.
IEEE 802.3af is the formal industry standard for Power over Ethernet, specifying that up to 15.4W of DC power can be delivered to a connected device - such as an IP phone or access point - over Cat5 or higher Ethernet cable. It is vendor-neutral and interoperable across compliant switches and endpoints, making it the definitive industry standard for this purpose.
A local power brick is a standalone AC adapter plugged directly into a wall outlet and is not related to Ethernet-based power delivery in any way.
Concept tested: IEEE 802.3af Power over Ethernet industry standard
Source: https://standards.ieee.org/ieee/802.3af/1090/
Topics
Community Discussion
No community discussion yet for this question.