Core network and backbone network typically refer to the high capacity communication facilities that connect primary nodes. Core/backbone network provides path for the exchange of information between different sub-networks. In the world of Enterprises, the term backbone is more used, while for Service Providers, the term core network is more used.

In the U.S. local exchange Core Networks are linked by several competing Interexchange networks; in the rest of the world (now) the Core Network extends to national boundaries.

Core/backbone network usually has a mesh topology that provides any-to-any connections among devices on the network. Many main service providers in the world have their own core/backbone networks, that are interconnected. Some large enterprises have their own core/backbone network, which are typically connected to the public networks.

The devices and facilities in the core / backbone networks are switches and routers. The trend is to push the intelligence and decision making into access and edge devices and keep the core devices dump and fast. As a result, switches are more and more often used in the core/backbone network facilities. The technologies used in the core and backbone facilities are data link layer and network layer technologies such as SONET, DWDM, ATM, IP, etc. For enterprise backbone network, gigabit Ethernet or 10 gigabit Ethernet technologies are also often used.

Core / Backbone Network and Technologies

Related Terms:Edge network, Access network, router, switch, ATM, SONET, IP, Gigabit Ethernet