A POE device requires 47 W of power. What POE specification should be used?

The correct answer is C. 802.3bt. A POE device that requires 47 W of power should use the 802.3bt specification. This is because 802.3bt is the latest POE standard that supports up to 90 W of power delivery over four pairs of wires in an Ethernet cable. The previous POE standards, such as 802.3af and 802.3at…

Wireless LAN (WLAN) Hardware and Software

Question

Options

A802.3at
B802.3af
C802.3bt
D802.11at

How the community answered

(58 responses)

A
2% (1)
B
3% (2)
C
86% (50)
D
9% (5)

Explanation

A POE device that requires 47 W of power should use the 802.3bt specification. This is because 802.3bt is the latest POE standard that supports up to 90 W of power delivery over four pairs of wires in an Ethernet cable. The previous POE standards, such as 802.3af and 802.3at, only support up to 15.4 W and 30 W of power delivery over two pairs of wires in an Ethernet cable, respectively. Therefore, they are not sufficient for powering a device that requires 47 W of power. The 802.11at specification does not exist; it is a typo or confusion with the 802.3at specification.

Topics

#PoE#802.3bt#802.3at#power budget

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