Which three of the following are valid posture states of an endpoint?

The valid posture state of an endpoint refers to its overall security and compliance status as assessed by the Cisco Identity Services Engine (ISE). Within this context, compliant is one of the recognized posture states indicating that the endpoint meets the required security policies and guidelines set by the organization. A compliant state often means that the endpoint's software, antivirus definitions, security patches, and configurations align with corporate compliance requirements.

In addition to compliant, other posture states include non-compliant or remediation states—showing that the device has vulnerabilities or configuration issues that require attention—but these terms were not included in the choices provided.

The other options, while related to security concepts, do not specifically represent recognized posture states as defined by Cisco ISE. For instance, secure and unsecure are more general terms that describe the security status of an endpoint but lack the specificity of compliance with designated policies. Similarly, authenticated pertains to the successful verification of an endpoint’s identity, which is a separate process distinct from posture assessment.

By focusing on compliance, Cisco ISE ensures that devices not only authenticate successfully but also adhere to the necessary security standards before being granted full access to the network.