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 Cisco Umbrella evaluates policies from the top down and looks for a matching identity and destination. Once a match is found, Umbrella applies that policy’s settings to the identity and destination and stops evaluating all other DNS policies. Therefore, to ensure that the policy that the identity must use takes precedence over the second one, the engineer should make the correct policy first in the policy order. This way, Umbrella will match the identity to the correct policy before checking the second policy. The other options are not correct because they do not guarantee that the identity will use the correct policy. Configuring the default policy to redirect the requests to the correct policy will not work if the identity matches another policy before the default one. Placing the policy with the most-specific configuration last in the policy order will not work if the identity matches a less-specific policy before the last one. Configuring only the policy with the most recently changed timestamp will not work if the identity matches an older policy before the newer one. References :=

Some possible references are:

Policy Precedence - Umbrella User Guide1

Manage Policies - Umbrella User Guide2

Umbrella Policy order - Cisco Community3

Explanation

Explanation

Southbound APIs enable SDN controllers to dynamically make changes based on real-time demands and

scalability needs.

Posture is a service in Cisco ISE that allows you to check the compliance, also known as posture, of endpoints, before allowing them to connect to your network. A posture agent, such as the AnyConnect ISE Posture Agent or Network Admission Control (NAC) Agent, runs on the endpoint and collects information about the endpoint’s security posture, such as antivirus, antispyware, firewall, and patch status. The posture agent then communicates with the ISE server, which evaluates the posture information against the posture policy and determines the compliance state of the endpoint. Based on the compliance state, the ISE server can grant or deny network access to the endpoint, or apply remediation actions to bring the endpoint into compliance. Posture service is part of the ISE solution for network access control (NAC), which aims to secure the network from unauthorized or compromised endpoints. References:

Cisco Identity Services Engine Administrator Guide, Release 2.2 - Configure Client Posture Policies

Configuring posture services with the Cisco Identity Services Engine - Cisco Community

Cisco Content Hub - Configure Client Posture Policies