Which technology allows for the central remote monitoring of network switches and routers?

The Simple Network Management Protocol (SNMP) allows for the central monitoring of switches and routers by using traps and polling of network metrics. Syslog is a method of collecting logs for passive analysis after an event has been brought to your attention. Software-defined networking (SDN) allows for the centralized control of switches and routers. The Cisco Discovery Protocol (CDP) is used to discover Cisco devices on the immediate network.