Which of the following is a common feature of modern USB ports?

Modern USB ports commonly feature the ability to provide power to devices, enabling not only data transfer but also charging capabilities. This is particularly useful for smartphones, tablets, and various peripherals that require power while connected to a computer or charger. The advent of standards such as USB Power Delivery has enhanced this aspect, allowing for higher power levels to be transmitted, which supports faster charging and operation of power-hungry devices.

The other characteristics, while sometimes true in certain contexts, do not apply universally to modern USB ports. For instance, USB ports support multiple speeds, including USB 3.0 and 3.1, thus not limited to just USB 2.0 speeds. The requirement for a device driver varies; many USB devices are "plug and play," meaning they do not need individual drivers for every connection. Lastly, while many USB ports are backward compatible, not all devices may function as intended when connecting newer ports to older devices, especially if the necessary adapters are not available.