A Network USB Server Bus (sometimes referred to as a USB over Network server) is a type of software or hardware device that allows you to share USB devices (such as printers, scanners, storage devices, etc.) over a network, so they can be accessed by multiple computers or users remotely. Essentially, it turns a USB port on a computer or server into a network-accessible port, allowing other devices on the network to use the attached USB peripherals as if they were locally connected.