Adaptor is a device used to connect two different interfaces, which converts signals from one interface to another. Adaptor can also be used to connect power from two interfaces in order to pass power from one to the other. Hub also known as a port replicator, is an external device designed for portable mobile electronic devices, primarily laptops. By duplicating and expanding the ports of a laptop, it allows for a convenient one-stop connection between the laptop and multiple accessories or external devices such as power adapters, network cables, mice, external keyboards, printers, and external monitors.