What type of probe includes DHCP SPAN as one of its types?

The correct answer is based on the role and function of the network probes in the context of Cisco Identity Services Engine (ISE). Network probes are designed to collect information about the devices and users connecting to the network. They operate by observing the traffic and characteristics of the network, enabling administrators to gather valuable insights regarding network activity.

DHCP SPAN (Switched Port Analyzer) falls under the category of network probes because it captures DHCP messages exchanged on the network. This includes any requests and offers made between DHCP clients and servers. By analyzing this data, network probes can discern information such as device identity, role, and connection status.

In this scenario, the use of DHCP SPAN allows the ISE system to understand which devices are trying to obtain IP addresses and authenticate on the network, thus providing critical data needed for policy enforcement and network security management. This seamless integration of various probing techniques helps enhance the overall visibility of network activity, making network probes fundamental for monitoring and managing the network environment effectively.