CWT Power over Ethernet (PoE) & Cabling Infrastructure 3

Question 1

What additional capability does LLDP-MED provide beyond standard PoE classification in a wireless deployment?

Accepted Answer

It enables granular power negotiation beyond the standard class tiers

Answer

It allows discovery of device MAC addresses across VLANs

Answer

It provides encrypted PoE power delivery for secure environments

Answer

It replaces the need for PSE detection signature testing

Question 2

What does the 'perpetual PoE' feature on enterprise switches provide?

Accepted Answer

Uninterrupted PoE power to ports during a switch reboot or firmware upgrade

Answer

PoE power automatically scales with cable length

Answer

PoE delivery extended beyond 100 meters via inline repeaters

Answer

A redundant second power supply dedicated to PoE ports

Question 3

When troubleshooting a PoE-powered access point that will not power on, what should the technician do FIRST?

Accepted Answer

Verify the switch port is PoE-enabled and confirm available power budget

Answer

Replace the access point with a known-good unit immediately

Answer

Replace the entire cable run to eliminate cabling issues

Answer

Update the switch firmware to the latest version

Question 4

What minimum AWG conductor size is standard in CAT5e/CAT6 cables and recommended for PoE+ installations?

Accepted Answer

AWG 24

Answer

AWG 28

Answer

AWG 26

Answer

AWG 22

Question 5

A technician measures 42V at a PoE access point when the PSE outputs 48V. What is the most likely cause?

Accepted Answer

Excessive cable length or high cable resistance causing voltage drop

Answer

The PSE port is defective and must be replaced

Answer

The access point is drawing too little current

Answer

The deployment is using IEEE 802.3af Class 0

Question 6

Which UPS characteristic is most critical for protecting a PoE switch that powers mission-critical wireless access points?

Accepted Answer

Automatic voltage regulation (AVR) with hot-swappable batteries

Answer

Color LCD status display

Answer

Bluetooth remote management capability

Answer

Compact 1U rack form factor

Question 7

What is the IEEE 802.3bt Type 3 maximum power output at the PSE?

Accepted Answer

60 watts

Answer

30 watts

Answer

45 watts

Answer

90 watts