Explore the world of identity, systems, and information with these IDS Trivia Questions and Answers. Whether you are interested in technology, data systems, or general knowledge topics related to IDS, this collection offers a fun and engaging way to test what you know.

Perfect for students, tech enthusiasts, and trivia lovers, these questions cover key concepts, interesting facts, and practical insights. Challenge yourself, learn something new, and enjoy an interactive quiz experience with IDS trivia.

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IDS Trivia Question and Answers PDF – Download the Ultimate Quiz Pack

1. What does IDS commonly stand for in cybersecurity?

A) Internet Data System
B) Intrusion Detection System
C) Internal Data Security
D) Integrated Device Software

Correct Answer: B) Intrusion Detection System

Explanation: IDS stands for Intrusion Detection System, which monitors networks or systems for malicious activity.

2. What is the primary purpose of an IDS?

A) To block all internet traffic
B) To detect suspicious activities
C) To store data
D) To speed up networks

Correct Answer: B) To detect suspicious activities

Explanation: IDS tools analyze traffic and behavior to identify potential threats or attacks.

3. Which type of IDS monitors network traffic?

A) HIDS
B) NIDS
C) DIDS
D) SIDS

Correct Answer: B) NIDS

Explanation: Network Intrusion Detection Systems monitor traffic across an entire network.

4. What does HIDS stand for?

A) Host Intrusion Detection System
B) High Internet Data System
C) Hybrid Internal Data System
D) Host Integrated Data Software

Correct Answer: A) Host Intrusion Detection System

Explanation: HIDS monitors activities on a single host or device.

5. Which IDS type is installed on individual devices?

A) NIDS
B) HIDS
C) Cloud IDS
D) Hybrid IDS

Correct Answer: B) HIDS

Explanation: HIDS is installed on specific systems to monitor internal activities.

6. What is a signature-based IDS?

A) Detects unknown attacks
B) Uses known attack patterns
C) Blocks traffic automatically
D) Encrypts data

Correct Answer: B) Uses known attack patterns

Explanation: Signature-based IDS identifies threats by comparing activity to known attack signatures.

7. What is anomaly-based detection?

A) Detecting known threats only
B) Monitoring normal behavior and flagging deviations
C) Blocking all traffic
D) Encrypting files

Correct Answer: B) Monitoring normal behavior and flagging deviations

Explanation: Anomaly-based IDS detects unusual behavior that may indicate new or unknown threats.

8. What is a false positive in IDS?

A) A missed attack
B) Correct detection
C) Incorrect alert for normal activity
D) System crash

Correct Answer: C) Incorrect alert for normal activity

Explanation: A false positive occurs when harmless activity is mistakenly flagged as malicious.

9. What is a false negative in IDS?

A) Detecting too many threats
B) Missing a real attack
C) System shutdown
D) Blocking traffic

Correct Answer: B) Missing a real attack

Explanation: A false negative happens when an IDS fails to detect an actual threat.

10. Which system actively blocks threats?

A) IDS
B) IPS
C) DNS
D) VPN

Correct Answer: B) IPS

Explanation: Intrusion Prevention Systems (IPS) not only detect but also block malicious activity.

11. What does IDS analyze to detect threats?

A) Hardware only
B) Network traffic and system activity
C) Power usage
D) Screen brightness

Correct Answer: B) Network traffic and system activity

Explanation: IDS systems analyze data patterns and behavior to identify potential threats.

12. Which IDS type combines host and network monitoring?

A) NIDS
B) HIDS
C) Hybrid IDS
D) Passive IDS

Correct Answer: C) Hybrid IDS

Explanation: Hybrid IDS integrates both host-based and network-based monitoring.

13. What is the main limitation of signature-based IDS?

A) High cost
B) Cannot detect new threats
C) Slow performance
D) Complex setup

Correct Answer: B) Cannot detect new threats

Explanation: Signature-based systems rely on known patterns, so they may miss new or unknown attacks.

14. What does real-time monitoring mean in IDS?

A) Delayed analysis
B) Monitoring as events happen
C) Weekly scanning
D) Monthly updates

Correct Answer: B) Monitoring as events happen

Explanation: Real-time monitoring allows immediate detection of suspicious activity.

15. Which environment commonly uses IDS?

A) Home kitchens
B) Computer networks
C) Farms
D) Schools only

Correct Answer: B) Computer networks

Explanation: IDS is widely used in IT and network security environments.

16. What role does logging play in IDS?

A) Deletes data
B) Records activity for analysis
C) Speeds up internet
D) Blocks users

Correct Answer: B) Records activity for analysis

Explanation: Logs help security teams review past events and investigate incidents.

17. What is an alert in IDS?

A) A system crash
B) Notification of suspicious activity
C) Software update
D) Password change

Correct Answer: B) Notification of suspicious activity

Explanation: IDS generates alerts when it detects potential threats.

18. What is a common deployment location for NIDS?

A) Inside printers
B) Network gateways
C) Power outlets
D) Mobile apps only

Correct Answer: B) Network gateways

Explanation: NIDS is often placed at strategic points like gateways to monitor traffic.

19. What is the benefit of anomaly-based IDS?

A) Detects only known attacks
B) Detects unknown threats
C) Slows systems
D) Blocks all users

Correct Answer: B) Detects unknown threats

Explanation: By identifying unusual patterns, anomaly-based IDS can detect new threats.

20. What is the ultimate goal of IDS?

A) Replace users
B) Increase threats
C) Enhance system security
D) Delete files

Correct Answer: C) Enhance system security

Explanation: IDS helps protect systems by detecting and alerting about potential attacks.

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IDS Trivia Question and Answers Quizlet – Test Your Knowledge Online

1. What is a Distributed IDS (DIDS)?

A) A system used only on one device
B) Multiple IDS systems working together
C) A cloud storage service
D) A firewall replacement

Correct Answer: B) Multiple IDS systems working together

Explanation: DIDS combines data from several IDS sensors across a network for centralized analysis.

2. Which IDS type analyzes log files on a server?

A) NIDS
B) HIDS
C) IPS
D) VPN

Correct Answer: B) HIDS

Explanation: Host-based IDS monitors system logs, file changes, and internal activity on a specific device.

3. What is the role of a sensor in an IDS?

A) To store passwords
B) To collect data
C) To delete files
D) To block users

Correct Answer: B) To collect data

Explanation: Sensors gather network or system data that IDS analyzes for suspicious activity.

4. What is the purpose of IDS rules?

A) To slow the system
B) To define what is suspicious
C) To block users
D) To increase storage

Correct Answer: B) To define what is suspicious

Explanation: Rules help IDS identify patterns or behaviors that may indicate threats.

5. Which protocol is commonly monitored by IDS?

A) HTTP
B) FTP
C) TCP/IP
D) All of the above

Correct Answer: D) All of the above

Explanation: IDS monitors multiple protocols to detect threats across different types of traffic.

6. What is deep packet inspection in IDS?

A) Checking only headers
B) Ignoring packets
C) Analyzing full packet content
D) Deleting packets

Correct Answer: C) Analyzing full packet content

Explanation: Deep packet inspection examines both headers and payloads for hidden threats.

7. What is the role of a central management console?

A) To power devices
B) To manage and analyze IDS data
C) To store passwords
D) To block internet access

Correct Answer: B) To manage and analyze IDS data

Explanation: A central console helps administrators monitor alerts and manage multiple IDS systems.

8. What is baseline behavior in anomaly detection?

A) Random activity
B) Known normal system behavior
C) Malicious traffic
D) Blocked traffic

Correct Answer: B) Known normal system behavior

Explanation: IDS compares current activity to a baseline to detect anomalies.

9. What is signature updating important for?

A) Slowing the system
B) Detecting new known threats
C) Deleting logs
D) Blocking users

Correct Answer: B) Detecting new known threats

Explanation: Updated signatures allow IDS to recognize the latest attack patterns.

10. What is packet sniffing?

A) Blocking packets
B) Capturing and analyzing network traffic
C) Deleting data
D) Encrypting messages

Correct Answer: B) Capturing and analyzing network traffic

Explanation: Packet sniffing is used by IDS to inspect traffic for suspicious patterns.

11. What is the difference between IDS and firewall?

A) IDS blocks traffic, firewall detects
B) IDS detects, firewall blocks
C) Both are the same
D) Neither monitors traffic

Correct Answer: B) IDS detects, firewall blocks

Explanation: IDS identifies threats, while firewalls control and block traffic.

12. What is a zero-day attack?

A) A harmless event
B) A known attack
C) An unknown vulnerability exploit
D) A system update

Correct Answer: C) An unknown vulnerability exploit

Explanation: Zero-day attacks exploit vulnerabilities before they are known or patched.

13. Which IDS method is better for detecting zero-day attacks?

A) Signature-based
B) Anomaly-based
C) Firewall-based
D) Static-based

Correct Answer: B) Anomaly-based

Explanation: Anomaly-based IDS can detect unusual behavior even if the attack is unknown.

14. What is log correlation?

A) Deleting logs
B) Comparing logs from different sources
C) Ignoring logs
D) Encrypting logs

Correct Answer: B) Comparing logs from different sources

Explanation: Log correlation helps identify patterns across multiple systems.

15. What is IDS alert severity?

A) Color of alerts
B) Importance level of threats
C) System speed
D) Network size

Correct Answer: B) Importance level of threats

Explanation: Severity levels help prioritize responses to different threats.

16. What is passive IDS?

A) Actively blocks threats
B) Only monitors and alerts
C) Deletes files
D) Shuts down systems

Correct Answer: B) Only monitors and alerts

Explanation: Passive IDS does not take action; it only reports suspicious activity.

17. What is active IDS?

A) Only monitors
B) Detects and responds to threats
C) Ignores traffic
D) Deletes logs

Correct Answer: B) Detects and responds to threats

Explanation: Active IDS may take action, similar to an intrusion prevention system.

18. What is encryption’s effect on IDS?

A) Makes detection easier
B) Hides packet contents
C) Speeds up IDS
D) Deletes traffic

Correct Answer: B) Hides packet contents

Explanation: Encryption can limit IDS visibility into packet data.

19. What is network segmentation’s benefit for IDS?

A) Slows traffic
B) Improves monitoring control
C) Deletes data
D) Blocks internet

Correct Answer: B) Improves monitoring control

Explanation: Segmentation allows better placement of IDS sensors and more effective monitoring.

20. What is the main goal of IDS alerts?

A) Confuse users
B) Inform administrators of threats
C) Delete files
D) Shut down systems

Correct Answer: B) Inform administrators of threats

Explanation: Alerts notify security teams so they can respond quickly to potential attacks.

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Funny IDS Trivia Question and Answers – Entertaining Facts & Challenges

1. Question: What does IDS stand for?
Answer: Intrusion Detection System
Fun Fact: It’s like a watchdog for your network—but without the drool.

2. Question: What is the main job of an IDS?
Answer: To detect suspicious activity on a network
Fun Fact: Think of it as your network’s “neighborhood watch.”

3. Question: What is the difference between IDS and IPS?
Answer: IDS detects threats, IPS blocks them
Fun Fact: IDS says “Hey, something’s wrong!” while IPS says “Not on my watch!”

4. Question: Which type of IDS monitors network traffic in real-time?
Answer: Network-based IDS (NIDS)
Fun Fact: It’s like having security cameras for your data packets.

5. Question: Which type of IDS monitors activity on a single device?
Answer: Host-based IDS (HIDS)
Fun Fact: It’s the “personal trainer” for your computer.

6. Question: What is a false positive in IDS terminology?
Answer: When normal activity is flagged as malicious
Fun Fact: Sometimes IDS cries wolf… too often.

7. Question: What is a false negative?
Answer: When malicious activity goes undetected
Fun Fact: That’s the moment you really wish your IDS had glasses.

8. Question: Which IDS detection method looks for known attack patterns?
Answer: Signature-based detection
Fun Fact: It’s like recognizing a celebrity—if it’s seen it before, it reacts.

9. Question: Which IDS detection method looks for unusual behavior?
Answer: Anomaly-based detection
Fun Fact: It’s the “weird-o-meter” of your network.

10. Question: What common alert do IDS systems send admins?
Answer: “Suspicious activity detected”
Fun Fact: Translation: “I don’t know what it is, but I don’t like it.”

11. Question: Can IDS prevent attacks?
Answer: No, it only detects them
Fun Fact: Think of it as a smoke alarm, not a firefighter.

12. Question: What is Snort?
Answer: A popular open-source IDS
Fun Fact: It sniffs out network threats faster than you can say “packet sniffing.”

13. Question: What is the first thing an IDS administrator should do after an alert?
Answer: Investigate the alert
Fun Fact: Panicking before investigating is optional but common.

14. Question: What kind of attacks can IDS detect?
Answer: Viruses, malware, unauthorized access, and more
Fun Fact: Basically, anything your cat wouldn’t notice on the network.

15. Question: Why might an IDS slow down network performance?
Answer: Because it’s analyzing all the traffic
Fun Fact: Security sometimes comes with a tiny patience test.

16. Question: What’s the difference between inline and passive IDS?
Answer: Inline can block attacks; passive only alerts
Fun Fact: Inline is the bouncer; passive is the gossip.

17. Question: What does the “alert log” in an IDS contain?
Answer: Records of suspicious activity
Fun Fact: It’s like a diary, but full of network drama.

18. Question: Why is tuning an IDS important?
Answer: To reduce false positives and negatives
Fun Fact: Without tuning, it’s like shouting “Intruder!” at every squirrel.

19. Question: What kind of IDS uses machine learning to detect threats?
Answer: Next-generation IDS (NG-IDS)
Fun Fact: It’s basically a brainy robot watching your network.

20. Question: Can IDS detect insider threats?
Answer: Yes, especially host-based and anomaly-based systems
Fun Fact: Even your coworker who “accidentally” deletes files can’t escape.

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IDS Trivia Question and Answers for Adults – Challenging & Engaging Quiz

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1. Question: What does the abbreviation “IDS” commonly stand for in cybersecurity?
Answer: Intrusion Detection System
Fun Fact: IDS monitors network traffic for suspicious activity and potential threats.

2. Question: In biology, what does “IDS” refer to when discussing certain genetic disorders?
Answer: Iduronate-2-sulfatase deficiency (Hunter syndrome)
Fun Fact: IDS enzyme deficiency leads to accumulation of glycosaminoglycans, affecting multiple organs.

3. Question: In computing, what type of IDS actively blocks threats rather than just monitoring them?
Answer: Intrusion Prevention System (IPS)
Fun Fact: IPS is often considered the next step evolution of IDS in cybersecurity.

4. Question: In aviation, what does “IDS” refer to in aircraft design?
Answer: Integrated Display System
Fun Fact: IDS consolidates flight data, navigation, and alerts for pilots into a single interface.

5. Question: Which IDS method is signature-based and compares traffic to known attack patterns?
Answer: Signature-based IDS
Fun Fact: While highly accurate for known threats, it may fail against zero-day attacks.

6. Question: In military terminology, what does IDS stand for in NATO context?
Answer: Integrated Defense System
Fun Fact: It refers to coordinated defense strategies and technologies across multiple nations.

7. Question: In medical imaging, what is an IDS used for?
Answer: Image Display System
Fun Fact: IDS helps radiologists view and analyze complex imaging data like MRIs and CT scans.

8. Question: Which type of IDS analyzes network traffic patterns and flags abnormal behavior?
Answer: Anomaly-based IDS
Fun Fact: It can detect unknown attacks by identifying deviations from normal network activity.

9. Question: What does “IDS” stand for in industrial automation?
Answer: Intelligent Data System
Fun Fact: IDS collects and analyzes machine performance data to optimize industrial processes.

10. Question: In genetics research, what disorder is associated with a mutation in the IDS gene?
Answer: Hunter syndrome
Fun Fact: Hunter syndrome is an X-linked recessive disorder, primarily affecting males.

11. Question: In information security, what is a common limitation of a signature-based IDS?
Answer: Cannot detect new or unknown threats (zero-day attacks)
Fun Fact: To overcome this, many systems combine signature-based and anomaly-based methods.

12. Question: What IDS is often used in smart home systems to detect unauthorized access?
Answer: Network-based IDS (NIDS)
Fun Fact: NIDS can monitor Wi-Fi traffic and alert users to suspicious devices.

13. Question: In the automotive industry, IDS can refer to which system for vehicles?
Answer: Intelligent Driving System
Fun Fact: IDS uses sensors, cameras, and AI to assist with lane keeping, braking, and navigation.

14. Question: What does the term “host-based IDS” (HIDS) mean?
Answer: IDS installed on individual devices to monitor system activity
Fun Fact: HIDS can track file changes, user logins, and system events for security breaches.

15. Question: In network security, what is a common strategy to reduce false positives in IDS?
Answer: Tuning rules and thresholds based on normal network behavior
Fun Fact: Proper tuning increases accuracy and reduces unnecessary alerts.

16. Question: IDS in space research can stand for what kind of system?
Answer: Instrument Data System
Fun Fact: These systems collect and manage data from satellites and space instruments.

17. Question: What IDS approach uses machine learning to detect threats?
Answer: AI-based or behavior-based IDS
Fun Fact: Machine learning IDS can adapt to new attack patterns without prior knowledge.

18. Question: In healthcare IT, what does IDS often represent?
Answer: Integrated Delivery System
Fun Fact: IDS connects hospitals, clinics, and care providers to improve patient care and coordination.

19. Question: Which IDS is passive and only logs suspicious activity without intervention?
Answer: Passive IDS
Fun Fact: Passive IDS is often used when blocking actions might disrupt critical systems.

20. Question: In finance, IDS can refer to which type of system?
Answer: Intraday Data System
Fun Fact: IDS provides real-time tracking of stock prices, trading volumes, and market fluctuations.

Multiple Choice IDS Trivia Question and Answers – Easy to Play & Score

1. Question: What does IDS stand for?
Answer: Intrusion Detection System
Fun Fact: IDS helps organizations detect unauthorized access before damage occurs.

2. Question: What is the primary purpose of an IDS?
Answer: Detect unauthorized access
Fun Fact: Unlike firewalls, IDS mainly monitors and alerts rather than blocks traffic.

3. Question: Which of the following is a type of IDS?
Answer: Signature-based
Fun Fact: Signature-based IDS relies on known attack patterns, like a “security fingerprint.”

4. Question: Which type of IDS analyzes network traffic for unusual behavior?
Answer: Anomaly-based IDS
Fun Fact: Anomaly-based IDS can detect new attacks that have never been seen before.

5. Question: Which IDS monitors a single host for suspicious activity?
Answer: Host-based IDS
Fun Fact: HIDS keeps an eye on logs, files, and system events of a specific machine.

6. Question: Which IDS monitors network traffic for malicious activity?
Answer: Network-based IDS
Fun Fact: NIDS can watch hundreds of computers at once by monitoring network traffic.

7. Question: What is the difference between IDS and IPS?
Answer: IDS detects threats, IPS prevents them
Fun Fact: IDS is like an alarm system, while IPS is like a security guard.

8. Question: Which of these is a common tool used as an IDS?
Answer: Snort
Fun Fact: Snort is one of the most popular open-source IDS tools worldwide.

9. Question: Signature-based IDS works by:
Answer: Comparing traffic to known attack patterns
Fun Fact: It’s similar to antivirus software that scans for known virus signatures.

10. Question: Anomaly-based IDS requires:
Answer: A model of normal behavior
Fun Fact: Once normal behavior is learned, unusual activity triggers alerts.

11. Question: Which type of IDS generates alerts but does not block traffic?
Answer: Passive IDS
Fun Fact: Passive IDS can warn administrators without affecting network flow.

12. Question: IDS can help protect against:
Answer: All of the above (Malware, Unauthorized logins, Data exfiltration)
Fun Fact: IDS provides visibility into threats that might otherwise go unnoticed.

13. Question: Which protocol is often monitored by IDS in networks?
Answer: All of the above (HTTP, FTP, SMTP)
Fun Fact: IDS can monitor web traffic, file transfers, and emails for suspicious activity.

14. Question: A false positive in IDS means:
Answer: Normal activity is incorrectly flagged as malicious
Fun Fact: False positives are common, which is why tuning IDS is important.

15. Question: Which is a limitation of IDS?
Answer: Cannot prevent attacks on its own
Fun Fact: IDS is primarily a detective tool and usually works with firewalls or IPS.

16. Question: Host-based IDS primarily monitors:
Answer: System logs and files
Fun Fact: HIDS can detect unauthorized file changes, like a secret tampering alarm.

17. Question: What does IPS stand for?
Answer: Intrusion Prevention System
Fun Fact: IPS can actively block threats in real-time, unlike IDS.

18. Question: A hybrid IDS combines:
Answer: Host-based and network-based detection
Fun Fact: Hybrid IDS gives the best of both worlds: local and network-level monitoring.

19. Question: IDS alerts are usually sent to:
Answer: System administrators
Fun Fact: Administrators can then investigate and respond to potential threats.

20. Question: Which of the following is a benefit of IDS?
Answer: All of the above (Detects security breaches, Improves compliance, Provides forensic evidence)
Fun Fact: IDS not only secures networks but also helps companies meet regulatory standards.

Printable IDS Trivia Questions and Answers – Perfect for Study or Game Night

1. Question: What does IDS stand for in cybersecurity?
Answer: Intrusion Detection System
Fun Fact: IDS monitors network or system activities for malicious actions or policy violations.

2. Question: What are the two main types of IDS?
Answer: Network-based IDS (NIDS) and Host-based IDS (HIDS)
Fun Fact: NIDS monitors network traffic, while HIDS monitors activities on individual devices.

3. Question: What is the primary purpose of an IDS?
Answer: To detect unauthorized access or attacks on a system
Fun Fact: Unlike firewalls, IDS focuses on detection, not prevention.

4. Question: Which IDS detection method uses predefined attack patterns?
Answer: Signature-based detection
Fun Fact: It’s like antivirus software—quick, but only detects known threats.

5. Question: Which IDS detection method identifies unusual behavior instead of known patterns?
Answer: Anomaly-based detection
Fun Fact: It can catch new or unknown attacks by spotting deviations from normal behavior.

6. Question: What is a false positive in IDS terminology?
Answer: When the IDS flags legitimate activity as malicious
Fun Fact: Too many false positives can overwhelm security teams and reduce trust in IDS.

7. Question: What is a false negative in IDS terminology?
Answer: When the IDS fails to detect a real threat
Fun Fact: False negatives are dangerous because actual attacks can go unnoticed.

8. Question: Which open-source IDS is widely used for network intrusion detection?
Answer: Snort
Fun Fact: Snort can operate in sniffer, packet logger, or intrusion detection mode.

9. Question: What is the difference between IDS and IPS?
Answer: IDS detects attacks; IPS prevents attacks
Fun Fact: IPS is like IDS with the added ability to block threats in real-time.

10. Question: What kind of data does a host-based IDS monitor?
Answer: System logs, file integrity, and application activity
Fun Fact: HIDS can detect insider threats that network-based systems might miss.

11. Question: Which protocol is commonly monitored by network-based IDS?
Answer: TCP/IP
Fun Fact: Almost all network traffic passes through TCP/IP, making it essential for detection.

12. Question: What is a signature in the context of IDS?
Answer: A known pattern of malicious activity
Fun Fact: Signatures must be updated frequently to detect new threats.

13. Question: What is the purpose of an alert in IDS?
Answer: To notify administrators about potential threats
Fun Fact: Alerts can be sent via email, SMS, or a dashboard for immediate response.

14. Question: What is the key advantage of anomaly-based IDS over signature-based IDS?
Answer: It can detect new, unknown threats
Fun Fact: Machine learning is increasingly used to improve anomaly detection accuracy.

15. Question: Can an IDS block malicious traffic?
Answer: No, standard IDS only detects; blocking requires an IPS
Fun Fact: Some systems combine IDS and IPS for both detection and prevention.

16. Question: What does the term “real-time monitoring” mean in IDS?
Answer: Analyzing network or host activity as it happens
Fun Fact: Real-time detection allows faster response to attacks.

17. Question: Which famous intrusion detection tool was released in 1998 and is still widely used?
Answer: Snort
Fun Fact: Snort has a massive community contributing rules and updates.

18. Question: What is an IDS log?
Answer: A record of detected activities and potential attacks
Fun Fact: Security analysts often review IDS logs to investigate incidents.

19. Question: Which type of attack does IDS commonly detect?
Answer: Denial of Service (DoS), port scans, malware, and unauthorized access
Fun Fact: Some IDS can even detect zero-day attacks using anomaly detection.

20. Question: Why is tuning important for an IDS?
Answer: To reduce false positives and improve accuracy
Fun Fact: Proper tuning ensures that alerts are meaningful and actionable.

Ultimate IDS Trivia Questions and Answers Collection – Fun for Everyone