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Free CompTIA CySA+ CS0-003 Practice Question

During routine monitoring of network traffic, you notice an unusual spike in outbound traffic on port 25 from a device within your organization that doesn't typically send emails. Despite this anomaly, email services appear to be functioning normally for all users. What is the MOST likely explanation for this behavior?

  • User sending bulk emails legitimately

  • Regular email service misconfiguration

  • Scheduled backup over SMTP

  • Compromised system sending out spam

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Security Operations
Vulnerability Management
Incident Response and Management
Reporting and Communication
CompTIA CySA+ CS0-003
  • Security Operations
    • This question is filed here
  • Vulnerability Management
  • Incident Response and Management
  • Reporting and Communication