NetCrunch is a modular platform that can be customized to fit your needs. It supports all SNMP versions, including version 3 with support for version 3 traps. NetCrunch uses the SNMP protocol to monitor routers, switches, printers, firewalls, sensors, and other devices. NetCrunch discovers and presents physical connections between switches and nodes on the layer 2 topology maps. The program automatically updates physical maps if new nodes or connection changes are discovered.