Which statement about PoE (Power over Ethernet) technology is true?

• A. It requires additional cabling
• B. It delivers data and power over the same cable
• C. It can only be used with fiber-optic cables
• D. It is limited to low power devices

Answer: (B)

The statement that PoE (Power over Ethernet) delivers data and power over the same cable is indeed accurate. PoE technology allows for both electrical power and data transmission to be sent through an Ethernet cable, thus eliminating the need for separate power sources for connected devices. This capability is particularly beneficial in simplifying installations and reducing costs, especially in environments where multiple devices such as IP cameras, VoIP phones, or wireless access points need to be powered and connected to a network.

In contrast, the other statements are not applicable to PoE technology. It does not require additional cabling since it utilizes existing Ethernet cabling to deliver both power and data. It is also not exclusive to fiber-optic cables; rather, it works over standard twisted-pair copper cables like Cat5e, Cat6, etc. Additionally, while PoE is designed for devices with specific power requirements, it has evolved to deliver varying power levels, allowing it to support more than just low-power devices, thus broadening its usability in modern networking solutions.