Distribution frame is a framework for network integrated wiring, with network modules on it. The perforated network cable on the back of the module connects the network interfaces of various offices, and the front is used to connect network jumpers and switches.

A switch is a device that enables computers connected to it to share a network. There are also high-end switches that can be configured with different networks. The characteristic of the switch is that each port has the same independent bandwidth. For example, if you are a 100M switch, the bandwidth of each interface is also 100M.

The hub has the same function as a switch, except that all interfaces share a bandwidth, such as 10M hub. If there are five computers connected to it, each computer can only be allocated a bandwidth of 2M, thus eliminating the hub.