CYB236 Chapter 5: Network Anomaly Detection Systems
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Questions and Answers

What is the primary objective of Network Anomaly Detection Systems (NADS)?

  • To design algorithms for intrusion detection
  • To develop techniques for network traffic analysis
  • To create personal profiles for network users
  • To identify and predict abnormal network behavior (correct)

How do personal profiles in NADS facilitate anomaly detection?

  • By analyzing network traffic patterns
  • By generating alerts for suspicious behavior
  • By modeling normal network behavior (correct)
  • By monitoring network activities in real-time

What is the purpose of reducing multidimensional vectors in NADS?

  • To increase the complexity of network analysis
  • To reduce the computational overhead of NADS
  • To improve the accuracy of anomaly detection
  • To enable easier identification of anomalies (correct)

What technique is used in NADS algorithm generation to design effective methods?

<p>Genetic algorithms and machine learning (C)</p> Signup and view all the answers

What is the outcome of analyzing and modeling network activities in NADS?

<p>Creation of personal profiles (D)</p> Signup and view all the answers

What is the primary function of personal profiles in NADS?

<p>To identify normal network behavior (B)</p> Signup and view all the answers

What is the ultimate goal of Network Anomaly Detection Systems (NADS)?

<p>To increase network security (B)</p> Signup and view all the answers

What is the role of machine learning in NADS algorithm generation?

<p>To design effective anomaly detection methods (A)</p> Signup and view all the answers

What is the primary function of expert systems in NADS?

<p>To mimic human decision-making abilities (A)</p> Signup and view all the answers

Which technique is used to detect anomalies by defining rules describing normal network behavior?

<p>Rule-based systems (D)</p> Signup and view all the answers

What do artificial neural networks in NADS learn from?

<p>Network characteristics (B)</p> Signup and view all the answers

What is the purpose of assigning membership degrees to network events in fuzzy logic?

<p>To identify network events similar to predefined rules (A)</p> Signup and view all the answers

Which technique is not a machine learning algorithm?

<p>Rule-based systems (C)</p> Signup and view all the answers

What is a characteristic of fuzzy logic in NADS?

<p>Assigns membership degrees to network events (B)</p> Signup and view all the answers

Which technique in NADS is used to identify and predict abnormal behavior?

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

What is the primary goal of NADS?

<p>To detect anomalies (A)</p> Signup and view all the answers

What type of neural networks are used in anomaly detection?

<p>Semi-supervised neural networks (C)</p> Signup and view all the answers

What is the primary objective of an agent in reinforcement learning?

<p>To maximize the reward (B)</p> Signup and view all the answers

In which fields have reinforcement learning models been applied to anomaly detection?

<p>Algorithmic trading and asset integrity management (A)</p> Signup and view all the answers

What type of learning is used in anomaly detection to identify anomalies in limited labeled data?

<p>Semi-supervised learning (B)</p> Signup and view all the answers

What is the overarching goal of an agent in reinforcement learning?

<p>To reach an endgame (D)</p> Signup and view all the answers

In reinforcement learning, what defines beneficial activity and non-beneficial activity?

<p>Clear parameters (C)</p> Signup and view all the answers

What is the primary application of reinforcement learning in anomaly detection?

<p>To recognize anomalies in limited labeled data (A)</p> Signup and view all the answers

What type of training method is reinforcement learning?

<p>Machine learning training method (D)</p> Signup and view all the answers

What methodology is used in NADS to determine malicious activity on a network?

<p>Fuzzy logic (C)</p> Signup and view all the answers

What is the primary function of artificial neural networks in NADS?

<p>Unsupervised anomaly detection (B)</p> Signup and view all the answers

How does AI-driven anomaly detection algorithms improve anomaly detection accuracy?

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

What is the benefit of using real-time analysis in NADS?

<p>Immediate detection of anomalies (A)</p> Signup and view all the answers

How is EWMA used in Fuzzy Logic?

<p>To calculate thresholds for anomalies (A)</p> Signup and view all the answers

What is the role of genetic algorithms in Fuzzy Logic?

<p>To create a network profile (D)</p> Signup and view all the answers

What is the primary function of machine learning in NADS?

<p>Training algorithms to make predictions or decisions (B)</p> Signup and view all the answers

What is the purpose of automation in AI-driven anomaly detection algorithms?

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

What is the primary function of Filter-ary-Sketch in NADS?

<p>Identifying malicious buckets in recorded traffic (C)</p> Signup and view all the answers

What is the main advantage of combining filtering algorithms and statistical methods in NADS?

<p>Improved accuracy in anomaly detection (B)</p> Signup and view all the answers

What is the role of Kohonen Maps in NADS?

<p>Clustering network traffic and modeling traffic patterns (C)</p> Signup and view all the answers

What is the primary application of neural networks in NADS?

<p>Identifying and predicting abnormal behavior in computer networks (C)</p> Signup and view all the answers

What is the purpose of using multiple-level dataset filtering in NADS?

<p>Improving accuracy in anomaly detection (A)</p> Signup and view all the answers

What is the primary advantage of using Variable-order Markov Chains in NADS?

<p>Improved accuracy in anomaly detection (D)</p> Signup and view all the answers

What is the main goal of anomaly detection in social networks using NADS?

<p>Detecting and predicting abnormal behavior in social networks (B)</p> Signup and view all the answers

What is the primary benefit of combining filtering algorithms and machine learning algorithms in NADS?

<p>Improved accuracy in anomaly detection (A)</p> Signup and view all the answers

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