This command uses RADIUS which combines authentication and authorization in one function (packet).

ExplanationThis command uses RADIUS which combines authentication and authorization in one function (packet).

CoA (Change of Authorization) is a feature that allows ISE to dynamically change the authorization attributes of an endpoint after it has been authenticated. CoA can be triggered by various events, such as posture assessment, profiling, or manual intervention1. There are different types of CoA that ISE can send to the network access device (NAD) to perform different actions on the endpoint session. The CoA type that achieves the goal of forcing an endpoint to re-authenticate without disrupting its session is CoA Reauth. CoA Reauth instructs the NAD to initiate a new RADIUS authentication for the endpoint, which allows ISE to apply a new or updated policy based on the latest attributes of the endpoint2. The other CoA types do not achieve this goal, as they either disconnect the endpoint session or do not change the authorization attributes. Port Bounce causes the NAD to shut down and bring up the port where the endpoint is connected, which effectively disconnects and reconnects the endpoint session2. CoA Terminate causes the NAD to terminate the endpoint session and send an Accounting-Stop message to ISE2. CoA Session Query causes the NAD to send an Accounting-Request message to ISE with the current session information, but does not change the authorization attributes of the endpoint2. References:
* Cisco Content Hub - Manage Network Devices, section "CoA Types"
* Solved: COA and ISE Clarification - Cisco Community, answer by Tarik Admani
* Configuring Profiler Policies [Cisco Identity Services Engine] - Cisco ..., section "Change of Authorization"

To share data between multiple security products, you must use Cisco Platform Exchange Grid (pxGrid).
pxGrid is an open and scalable framework that allows for bi-directional any-to-any partner platform integrations. pxGrid uses REST and WebSocket interfaces to exchange intelligence and obtain contextual information from Cisco Identity Services Engine (ISE) and other security products. pxGrid can also direct ISE to contain threats by setting network policies. pxGrid enables cross-platform network system collaboration across your IT infrastructure and helps you monitor security, detect threats, and manage assets, configuration, identity, and access. References: Introduction to the Cisco Platform Exchange Grid (pxGrid) in ISE, Cisco Identity Services Engine Administrator Guide, Release 3.3

NetFlow is a network protocol developed by Cisco for the collection and monitoring of network traffic flow data generated by NetFlow-enabled routers and switches. The flows do not contain actual packet data, but rather the metadata for communications. It is a standard form of session data that details who, what, when, and where of network traffic -> Answer A is not correct.
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