What Does Edge Router Mean?
An edge router is a specialized router residing at the edge or boundary of a network. This router ensures the connectivity of its network with external networks, a wide area network or the Internet. An edge router uses an External Border Gateway Protocol, which is used extensively over the Internet to provide connectivity with remote networks.
Techopedia Explains Edge Router
Edge routers use External BGP Protocol for data transmission because they are intermediary devices between two different networks and operate at the external or border layer of the network. There are several types of edge routers, including edge routers placed at the outer boundary of the network as an essential device for connecting the host network with the Internet. Whenever a node sends data on a network unmonitored by the host administrator, the data packet is sent to the last router on the authorized network, which is the edge router.
