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Cisco Firepower impact flags are indicators that help you evaluate the impact an intrusion has on your network by correlating intrusion data, network discovery data, and vulnerability information1. Impact flags are assigned to intrusion events based on the following criteria:

• The operating system and application protocol of the target host
• The exploitability of the target host by the attacker
• The relevance of the intrusion rule to the target host
• The severity of the intrusion rule Impact flags can have four values: unknown, neutral, affected, or vulnerable. Unknown means that the system does not have enough information to assess the impact. Neutral means that the system knows the target host is not affected by the intrusion. Affected means that the system knows the target host is affected by the intrusion, but not necessarily exploitable. Vulnerable means that the system knows the target host is exploitable by the intrusion1. Impact flags can help you prioritize your response to intrusion events, as well as generate reports and alerts based on the impact level. You can also use impact flags to filter and search for intrusion events in the Firepower Management Center1. References: 1: Firepower Management Center Configuration Guide, Version 6.1 - External Alerting with Alert Responses.

ExplanationThe Trusted Automated eXchangeof Indicator Information (TAXII) specifies mechanisms for exchangingstructured cyber threat information between parties over the network.TAXII exists to provide specific capabilities to those interested in sharing structured cyber threat information.TAXII Capabilities are the highest level at which TAXII actions can be described. There are three capabilitiesthat this version of TAXII supports: push messaging, pull messaging, and discovery.Although there is no “binding” capability in the list but it is the best answer here.

ExplanationA posture policy is a collection of posture requirements, which are associated with one or more identity groups, and operating systems. We can configure ISE to check for the Windows patch at Work Centers > Posture > Posture Elements > Conditions > File.In this example, we are going to use the predefined file check to ensure that our Windows 10 clients have the critical security patch installed to prevent the Wanna Cry malware.

a Cisco FirePower sensor to Firepower Management Center is configure manager add . This command establishes a secure connection between the sensor and the FMC using a registration key. The  parameter can be either the IP address or the hostname of the FMC. The  parameter can be any alphanumeric string that matches the one configured on the FMC. This command is executed on the sensor’s CLI in the privileged EXEC mode12. References: 1: Implementing and Operating Cisco Security Core Technologies (SCOR) course, Module 2: Network Security, Lesson 2: Deploying Cisco Firepower Next-Generation Firewall, Topic: Registering the Cisco Firepower NGFW to the FMC2: Firepower Management Center Configuration Guide, Version 6.6 - Device Management Basics [Cisco Secure Firewall Management Center] - Cisco.