- A backbone is a part of computer network that interconnects various pieces of network, providing a path for the exchange of information between different LANs or sub-networks.
- It is a larger transmission line that carries data gathered from smaller lines that interconnect with it.
- At the local level, it is a line or set of lines that local area networks connect to for a wide area network connection or within a local area network to span distances efficiently (for example, between buildings).
- On the Internet or other wide area network, a backbone is a set of paths that local or regional networks connect to for long-distance interconnection. The connection points are known as network nodes or telecommunication data switching exchanges (DSEs).