Consequently, plugging a device into one port may physically block an adjacent port, particularly when the plug is not part of a cable but is integral to a device such as a USB flash drive. The USB specification requires that bus-powered (passive) hubs are not connected in series to other bus-powered hubs.ĭepending on vendor and design, USB ports are often closely spaced. USB hubs can extend a USB network to a maximum of 127 ports. Ī "star" "short cable" external USB with the plastic casing removedĪ USB network is built from USB hubs connected downstream to USB ports, which themselves may stem from USB hubs. Hubs may feature power switches for individual ports to allow conveniently power cycling unresponsive devices.
Some USB hubs may support power delivery (PD) to charge the laptop battery, if self-powered and certified to do so, but may be referred to as a simple docking station due to the similar nature of only needing one connection to charge the battery and connect peripherals. "Short cable" hubs typically use an integral 6-inch (15 cm) cable to slightly distance a small hub away from physical port congestion and increase the number of available ports.Īlmost all modern Laptop/notebook computers are equipped with USB ports, but an external USB hub can consolidate several everyday devices (like a mouse, keyboard or printer) into a single hub to enable one-step attachment and removal of all the devices. Physically separate USB hubs come in a wide variety of form factors: from external boxes (looking similar to an Ethernet or network hub), to small designs that can be directly plugged into a USB port (see the "compact design" picture). All devices connected through a USB hub share the bandwidth available to that hub. Brand - Ugreen, Model - Ugreen 1 x 4 USB Sharing Switch, Type - USB 2.0 Sharing Switch, Use For - USB 2.0 Sharing Switch 4 Port, USB Peripheral Switcher Adapter Box Hub 4 PCs Share 1 USB Device for Printer Scanner with 4 Pack USB 2.0 Male Cable, Features - USB 2.0 sharing switch 4 port is the ideal solution for one-touch switching of access between four computers to a USB-based mouse, printer, scanner, and many other types of USB devices, Others - Wide Compatibility: Allows 4PC to share one USB device, for example, printer, scanner, camera, keyboard, and any other devices with USB, Easy Install: Just plug USB device into the USB port on the sharing switch, and connects 4 PC to the other 4 ports, LED indicator: LED indicator lights show which connected computer has control of the attached devices, Connectors: The switch can connect USB 2.0/1.1-compliant devices and hubs, but to function in USB 2.0 mode, the host PC and attached device or hub both must be USB 2.A four-port "compact design" USB hub: upstream and downstream ports shownĪ USB hub is a device that expands a single Universal Serial Bus (USB) port into several so that there are more ports available to connect devices to a host system, similar to a power strip.
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