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 (D)</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 (A)</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Signatures become outdated quickly due to evolving threats (C)</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. (B)</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. (A)</p> Signup and view all the answers

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

<p>Application-based (B)</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. (D)</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. (A)</p> Signup and view all the answers

What defines application-based intrusion detection?

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

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