Which device allows multiple connections at the same port?

The USB port is designed to facilitate connections for multiple devices using a single physical port. This capability is primarily achieved through the use of USB hubs, which can expand the number of available USB connections without requiring additional ports on the computer. When a USB hub is connected to a USB port, it allows multiple devices, like keyboards, mice, and storage devices, to communicate with the host computer simultaneously.

Furthermore, USB technology supports the daisy-chaining of devices, where one device can connect to another before reaching the port itself. This versatility makes USB ports widely used in many electronic devices, enhancing the user experience by broadening connectivity options.

In contrast, expanders typically refer to devices that increase capacity or capabilities in other contexts but are not specifically tied to how multiple connections are handled by the port itself. Ethernet adapters are used for network connections and do not focus on multiple device connections through a single port. Peripheral drivers are necessary software components that allow the operating system to communicate with a hardware device but do not impact the physical connection of multiple devices to a single port.