Network Device Terminology Simplified When you are trying to convey information to an IT person the words Routers, Switches and Radios is probably the second most not understood.  So what is what and what does each type of device do on a network. Switches and Radios Physically Switches and Access Points/Radios do the same thing.  Switches are for physical medium like Cat5 wiring (Ethernet).  Radios/Access Points do the same thing as switches...