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WGU C845 Task 2: Evaluating Incident Response Operations & Defending Network Security | Latest 2026 Update with complete solutions.

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WGU C845 Task 2: Evaluating Incident Response Operations & Defending Network Security | Latest 2026 Update with complete solutions. WGU C845 Task 2: Evaluating Incident Response Operations & Defending Network Security | Latest 2026 Update with complete solutions. WGU C845 Task 2: Evaluating Incident Response Operations & Defending Network Security | Latest 2026 Update with complete solutions.

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January 12, 2026
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WGU C845 Task 2: Evaluating Incident m1 m1 m1 m1 m1 m1




Response Operations & Defending Network
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Security | Latest 2026 Update with complete
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solutions.
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Task 2: Evaluating Incident Response Operations & Defending Network Security
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Information Systems Security - C845
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A. Evaluate the organization's response to m1 m1 m1 m1




the security incident.
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A1. Three Actions the Organization Took in Response to
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the Incident.
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1. Containment: The affected machine (10.1.1.45) was isolated from the network by m1 m1 m1 m1 m1 m1 m1 m1 m1 m1




disabling its network port at 10:07.
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2. Eradication & Recovery: The endpoint was restored from a backup at 13:45, and
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antivirus (AV) scans were initiated on the HR subnet.
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3. Post-Incident Improvement: Antivirus definitions were updated across all endpoints on
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the following day (06/25 at 08:30).
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A2. Evaluation of Effectiveness Using a Recognized
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Framework.
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Using the NIST SP 800-61 Rev. 2 (Computer Security Incident Handling Guide) framework, the
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effectiveness of these actions is evaluated as follows:
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• Action 1 (Containment via Port Disable): Partially Effective. According to NIST,
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containment strategies should be chosen based on the potential for damage and the
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need to preserve evidence. Disabling the switch port was a fast and effective way
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to
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, immediately stop ongoing data exfiltration or command-and-control (C2) traffic, aligning
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with the goal of minimizing immediate impact. However, the IDS log shows lateral
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movement via SMB from the infected host (10.1.1.45 to 10.1.2.10) at 10:45, which
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occurred after the initial containment at 10:07. This indicates the containment was
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either not fully effective on the first attempt or that a second, compromised host
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existed. A more robust containment strategy is needed.
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• Action 2 (Restoration from Backup & Subnet AV Scan): Effective for Recovery,
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Inadequate for Eradication. NIST emphasizes that eradication must ensure the malicious
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content is completely removed. Restoring from a clean backup is a valid and effective
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recovery tactic. Initiating AV scans on the HR subnet is a good eradication step to find
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other potential infections. However, the procedure relies on "removing known threats,"
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which may not catch polymorphic malware or new variants. The focus on the HR subnet,
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while logical, may have missed the lateral movement to the Finance subnet
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(10.1.2.10), as shown in the IDS log.
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• Action 3 (Organization-wide AV Update): Effective. This is a clear and effective post-
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incident activity that aligns with the NIST "Post-Incident Activity" phase. By updating
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definitions across all endpoints, the organization improves its defensive posture against
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a recurrence of the same threat, strengthening its preparedness for future incidents.
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