CWT Power over Ethernet (PoE) & Cabling Infrastructure 2

Question 1

What is the maximum PSE power output per port defined by IEEE 802.3bt Type 4 (Class 8)?

Accepted Answer

90 watts

Answer

60 watts

Answer

75 watts

Answer

100 watts

Question 2

In IEEE 802.3af/at Alternative A power delivery mode, which wire pairs carry the power signal?

Accepted Answer

The data-carrying pairs (pins 1, 2, 3, 6)

Answer

The spare pairs (pins 4, 5, 7, 8)

Answer

All four pairs simultaneously

Answer

Pins 3 and 6 only

Question 3

What is the function of PoE PD power classification?

Accepted Answer

To allow a PD to signal its maximum power requirement to the PSE

Answer

To authenticate a PD's security certificate

Answer

To identify the cable category the PD requires

Answer

To set the physical connector type on the PD

Question 4

A wireless access point is PoE Class 3 under IEEE 802.3af. What is its maximum allowable power draw at the device?

Accepted Answer

12.95 watts

Answer

6.49 watts

Answer

15.4 watts

Answer

30 watts

Question 5

What is the primary purpose of a PoE splitter?

Accepted Answer

To separate power from data so non-PoE devices can use PoE infrastructure

Answer

To split one PoE port into multiple non-PoE data ports

Answer

To increase PoE output beyond the rated standard wattage

Answer

To convert PoE to wireless charging for mobile devices

Question 6

Which physical factor most significantly causes power loss across a PoE cable run?

Accepted Answer

Conductor resistance of the cable

Answer

Cable jacket color

Answer

Cable manufacturer brand

Answer

Cable bend radius

Question 7

What best practice should be followed when planning power budgets for a PoE switch in a wireless deployment?

Accepted Answer

Sum device power requirements by class and add 20–25% headroom

Answer

Assume all ports will always draw maximum rated power simultaneously

Answer

Calculate only the average power draw of connected devices

Answer

Rely on DHCP to dynamically manage port power allocation