CompTIA® Comptia A+™ Core Certification Practice Questions

VOIP Connectivity

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Q8. A user wants to connect a VOIP phone to his wireless router. The router supports VOIP phone connectivity without any external power supply for the phone. Which of the following technologies enable to operate a VOIP phone without needing external power supply?

A. 802.11g

B. WEP

C. PoE

D. QoS

Correct Answer: C

Explanation:

Power over Ethernet or PoE technology describes a system to pass electrical power safely, along with data, on Ethernet cabling. The IEEE standard for PoE requires category 5 cable or higher for high power levels, but can operate with category 3 cable if less power is required.

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