International dialling prefix. Contents. An international dialling prefix is a telephone dialling code used to dial out of a country when making an international call. It's also called international access code, International Direct Dialling (IDD) code, exit code, international call prefix, etc.
Routers are small electronic devices that join multiple computer networks together via either wired or wireless connections. In technical terms, a router is a Layer 3 network gateway device, meaning that it connects two or more networks and that the router operates at the network layer of the OSI model. Routers contain a processor (CPU), several kinds of digital memory, and input-output (I/O) interfaces.
The home router serves as the core or centerpiece of the network to which computers, printers and other devices can be connected. Routers are not necessarily required to build a network. For example, you can connect two computers directly to each other with just a cable (or without wires in some cases).