Which technology allows multiple devices to connect and operate on a single network cable?

Which technology allows multiple devices to connect and operate on a single network cable?

• A. Ethernet switching
• B. PoE switches
• C. Fiber optics
• D. Wireless access points

Answer: (B)

Power over Ethernet (PoE) technology enables multiple devices to connect and operate over a single network cable by allowing both data and electrical power to be transmitted simultaneously. This is particularly beneficial for devices such as IP cameras, VoIP phones, and wireless access points, which require power and network connectivity without the need for separate power sources.

Using PoE, installers can reduce the amount of cabling needed, simplify installations, and offer greater flexibility in device placement. For instance, if a wireless access point is located far from an electrical outlet, PoE allows it to receive power through the same Ethernet cable used for data. This maximizes efficiency and simplifies infrastructure requirements.

The other technologies mentioned serve different purposes. Ethernet switching pertains to directing data traffic within a network but does not inherently provide power to devices. Fiber optics is a communication medium that offers high-speed data transmission but is different from PoE in terms of functionality. Wireless access points serve to connect devices wirelessly but do not indicate the method of cabling or power which is where PoE comes into play.