Explains the three layers critical to network design: Access, Distribution, and Core Anyone involved in networking and/or telecommunications should be somewhat familiar with the use of layers ...

The hierarchical design model divides a network into three layers: Access: Provides end-user access to the network. In the LAN, local devices such as phones and computers access the local network.

In this paper we develop a new heuristic for the hierarchical network design problem. The heuristic is based upon Lagrangian relaxation of a reformulation of the problem. In addition, we develop a ...