A network cabinet, also known as a rack or server cabinet (English: Server Rack) is a combination of hardware structures used to house technical equipment including routers, switch circuits, hubs, storage devices (UPS), cables, and of course servers. A network cabinet can also be understood as a bracket that allows servers and many important devices to be fixed in a firm, fixed position, helping to ensure stable operation. Network cabinets are usually used by companies that own servers and are located in data centers or communication centers. They are an integral part of the server.