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ISC2 Systems Security Certified Practitioner (SSCP) Practice Question

A security team deploys an anomaly-based network IDS in an AWS VPC to watch traffic from Linux application servers. After one week, the sensor flags a surge of outbound DNS queries from a newly launched EC2 instance, but administrators believe the spike is caused by expected auto-scaling start-up lookups. Which information would best help tune the IDS to suppress these false positives without reducing its ability to detect new attacks?

  • The latest CVE vulnerability scan results for the instance's operating system and packages

  • An updated signature pack containing known command-and-control and DNS-tunneling indicators

  • A historical baseline showing normal traffic rates and patterns for the EC2 instance and similar hosts

  • A whitelist of TCP and UDP ports that the application is expected to open during operation

ISC2 Systems Security Certified Practitioner (SSCP)
Network and Communication Security
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