This resource for network consultants and engineers gives advice on auditing, analyzing, and evaluating any network environment. It demonstrates where and how to gather relevant information and how to analyze it, and overviews the technology at each layer of the network. There are chapters on the open system interconnections model, LAN topologies, Ethernet, FDDI, telecommunications and telephony, frame relay WAN analysis, and voice technology. Other topics include remote access, routing protocols, and multiprotocol label switching. Sample forms for network auditing and documentation are included. Castelli is a consultant and enterprise network design engineer for a global telecommunications integrator.