Intrusion Detection Systems: Information Sources
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Questions and Answers

What is one of the limitations of signature-based intrusion detection systems?

  • Efficient in real-time analysis
  • Requires minimal resources
  • Continuous manual task of obtaining and maintaining signature files (correct)
  • High cost of implementation

    • Which type of detection system compares the activities of a process with the expected behavior for that type of process?

  • Pattern-based
  • Anomaly-based (correct)
  • Signature-based
  • Behavior-based

    • Why might it be challenging to use anomaly-based intrusion detection systems?

  • They are efficient in real-time analysis
  • They are highly cost-effective
  • Creating profiles to reflect expected behavior is difficult (correct)
  • They require minimal resources

    • What is a common issue faced by intrusion detection systems in a real-time analysis?

    <p>Massive amounts of data to analyze</p> Signup and view all the answers

    What type of logic is used by signature-based intrusion detection systems to detect intrusions?

    <p>Signature recognition</p> Signup and view all the answers

    Why does maintaining signature files pose a challenge for signature-based intrusion detection systems?

    <p>Signatures become outdated quickly due to evolving threats</p> Signup and view all the answers

    What distinguishes passive measures from active measures in Intrusion Detection Systems?

    <p>Active measures involve automated intervention, while passive measures involve reporting findings to humans.</p> Signup and view all the answers

    Where is intrusion detection typically performed in a network-based IDS?

    <p>At the boundary between the organization's network and the outside world.</p> Signup and view all the answers

    Which type of intrusion detection system is specific to a single application?

    <p>Application-based</p> Signup and view all the answers

    What is the primary function of host-based intrusion detection?

    <p>Detecting intrusions within and specific to one host.</p> Signup and view all the answers

    Why are active measures in intrusion detection important?

    <p>To ensure immediate actions are taken based on IDS findings.</p> Signup and view all the answers

    What defines application-based intrusion detection?

    <p>Focusing on a single application's specific requirements.</p> Signup and view all the answers

    What does the National Institute of Standards and Technology (NIST) define as an intrusion?

    <p>All of the above</p> Signup and view all the answers

    What is the consequence of a low proportion of actual intrusions in access attempts?

    <p>High proportion of false alarms leading to complacency</p> Signup and view all the answers

    Which term refers to the process of monitoring computer systems or networks for signs of intrusions?

    <p>Intrusion detection</p> Signup and view all the answers

    What is the main purpose of using an Intrusion Detection System (IDS) as stated in SP 800-31?

    <p>To prevent problem behaviors by increasing the risk of discovery and punishment for attackers</p> Signup and view all the answers

    What are some of the causes of intrusions as defined by NIST in SP 800-31?

    <p>Unauthorized access attempts, authorized users attempting to gain additional privileges, and misuse of privileges by authorized users</p> Signup and view all the answers

    Why does SP 800-31 mention the importance of using an IDS?

    <p>To prevent problem behaviors by increasing the perceived risk of discovery and punishment for attackers</p> Signup and view all the answers

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