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The textbook definition of a WAN is a computer network spanning regions, countries, or even the world. [3] [4] However, in terms of the application of communication protocols and concepts, it may be best to view WANs as computer networking technologies used to transmit data over long distances, and between different networks.
A router in a local area network (LAN) of a single organization is called an interior router. A router that is operated in the Internet backbone is described as exterior router. While a router that connects a LAN with the Internet or a wide area network (WAN) is called a border router, or gateway router. [24]
Voice/WAN interface cards (VWICs) can support voice, data, and voice and data applications, depending on the capabilities of the router in which the VWIC is installed." [1] The WIC is supported by many Cisco devices, particularly their branch routers including the 2500 series routers and its successors.
In computer networking, an edge device is a device that provides an entry point into enterprise or service provider core networks. [1] Examples include routers, [2] routing switches, integrated access devices (IADs), multiplexers, and a variety of metropolitan area network (MAN) and wide area network (WAN) access devices. Edge devices also ...
A router is configured with the provider's IP address on the WAN interface, which is shared among all devices in the LAN by network address translation. A gateway establishes physical and data link layer connectivity to a WAN over a service provider's native telecommunications infrastructure.
At the time that the 10 Gigabit Ethernet standard was developed, interest in 10GbE as a wide area network (WAN) transport led to the introduction of a WAN PHY for 10GbE. The WAN PHY was designed to interoperate with OC-192/STM-64 SDH/SONET equipment using a light-weight SDH/SONET frame running at 9.953 Gbit/s.
Another example may be that a network device might require a non-standard port feature such as power over Ethernet (PoE). (IP cameras and IP phones). A wireless access point is required for connecting wireless devices to a network. When a router includes this device, it is referred to as a wireless router, which is predominantly the case nowadays.
A residential gateway is a small consumer-grade gateway which bridges network access between connected local area network (LAN) hosts to a wide area network (WAN) (such as the Internet) via a modem, or directly connects to a WAN (as in EttH), while routing. The WAN is a larger computer network, generally operated by an Internet service provider.