An administrator must restrict access to the IP address of an application based on the...

The RADIUS probe must be enabled because a Cisco switch exports Device Sensor attributes to Cisco ISE through RADIUS accounting messages. Device Sensor gathers endpoint information from supported protocols and places the collected attributes into accounting updates sent to the ISE Policy Service Node. ISE’s RADIUS probe processes those attributes and adds them to the endpoint profiling database, where profiling policies can evaluate details such as HTTP user-agent information and browser characteristics. DHCP profiling primarily collects DHCP attributes such as host name, requested address, vendor class, and parameter request list. SNMP is used to query network devices or receive traps, while NetFlow provides traffic-flow information. Neither substitutes for the RADIUS channel used by the switch to del iver Device Sensor data to Cisco ISE for policy evaluation.