Intrusion Detection and Prevention Systems: Enhance Network Security

Question 1

Which of the following is a common method used by attackers to evade IDS detection?

Accepted Answer

Sending fragmented packets

Accepted Answer

Using encryption

Accepted Answer

Altering packet headers

Accepted Answer

Using polymorphic malware

Question 2

Which of the following is not a primary function of an Intrusion Detection System (IDS)?

Accepted Answer

Responding to security breaches in real-time

Answer

Monitoring network traffic for suspicious activity

Answer

Generating alerts

Answer

Logging security events

Question 3

Which type of IDS operates passively, analyzing network traffic without interfering with it?

Accepted Answer

Network-based IDS

Answer

Host-based IDS

Answer

Signature-based IDS

Answer

Anomaly-based IDS

Question 4

What is a false positive in the context of an IDS?

Accepted Answer

An alert triggered by legitimate network activity

Answer

An alert that fails to detect an actual security incident

Answer

An alert that is triggered by malware

Answer

An alert that is generated by a faulty IDS sensor

Question 5

What is the primary goal of an Intrusion Prevention System (IPS)?

Accepted Answer

To block malicious traffic in real-time

Answer

To detect and respond to security breaches

Answer

To deter unauthorized access to the network

Answer

To collect and analyze security data

Question 6

What is the primary consequence of improperly configured Intrusion Detection and Prevention Systems (IDPS) on a network's security?

Accepted Answer

Weakened security due to undetected intrusions

Answer

Enhanced security due to increased false positives

Answer

Improved performance and resource optimization

Question 7

The primary role of an Intrusion Detection System (IDS) is to:

Accepted Answer

Detect and report suspicious activities on a network

Answer

Prevent unauthorized access to network resources

Answer

Perform vulnerability assessments on network devices

Answer

Encrypt network traffic to protect sensitive data

Question 8

A key difference between an Intrusion Detection System (IDS) and an Intrusion Prevention System (IPS) is that:

Accepted Answer

An IDS can only detect threats, while an IPS can both detect and prevent them.

Answer

An IPS can only prevent known threats, while an IDS can detect both known and unknown threats.

Answer

An IPS is more likely to generate false positives than an IDS.

Answer

An IDS is more complex to configure and deploy than an IPS.

Question 9

Which of the following is an example of a signature-based IDS?

Accepted Answer

Snort

Answer

OSSEC

Answer

Splunk

Answer

Zeek

Question 10

One advantage of using anomaly-based IDS is that it can:

Accepted Answer

Detect zero-day attacks

Answer

Generate fewer false positives

Answer

Require less maintenance

Answer

Are easier to configure

Question 11

Which IDPS deployment mode involves placing sensors both inside and outside the network to monitor traffic?

Accepted Answer

Hybrid

Answer

Inline

Answer

Passive

Answer

Wireless

Question 12

What is the primary function of a 'Knowledge Base' within an IDPS?

Accepted Answer

Storing threat detection signatures and patterns

Answer

Maintaining information on network topology and assets

Answer

Tracking and managing security incidents

Answer

Analyzing and correlating event logs

Question 13

What is the primary distinction between an Intrusion Detection System (IDS) and an Intrusion Prevention System (IPS)?

Accepted Answer

IDS detects threats, while IPS prevents them

Answer

IDS can only work passively, while IPS can work both passively and actively

Answer

IDS requires more resources than IPS

Answer

IDS is generally more expensive than IPS

Question 14

When deploying Intrusion Detection and Prevention Systems (IDS/IPS) in an organizational setting, it's crucial to consider:

Accepted Answer

Organizations should carefully evaluate the legal and ethical implications before deploying IDS/IPS.

Answer

The deployment has no legal or ethical implications.

Answer

Organizations can implement IDS/IPS without consent or notification.

Question 15

Which of the following is **not** a key component of an Intrusion Detection and Prevention System (IDPS)?

Accepted Answer

Firewall

Answer

Responders

Answer

Analyzers

Answer

Sensors

Question 16

What is the **fundamental** distinction between intrusion detection and intrusion prevention?

Accepted Answer

Detection only alerts, while prevention actively blocks attacks

Answer

Detection focuses on past events, while prevention predicts future attacks

Answer

Detection requires manual analysis, while prevention is automated

Question 17

Which of the following is a **critical** step in managing an IDPS effectively?

Accepted Answer

Regularly updating signatures and rulesets

Answer

Disabling alerts to minimize distractions

Answer

Ignoring low-priority alerts to focus on immediate threats

Answer

Purchasing the most expensive IDPS solution available

Question 18

**Intrusion Detection vs Prevention Systems:** Which of the following is a primary distinction between Intrusion Detection Systems (IDS) and Intrusion Prevention Systems (IPS)?

Accepted Answer

IPS actively blocks or mitigates malicious traffic, while IDS primarily monitors and alerts.

Answer

IPS generates more false positives compared to IDS.

Answer

IDS is more challenging to deploy and manage than IPS.

Question 19

**Signature-Based Intrusion Detection:** Which method identifies malicious traffic by matching incoming packets against known malicious patterns?

Accepted Answer

Signature-based detection

Answer

Anomaly-based detection

Answer

Machine learning-based detection

Question 20

**Inline Intrusion Prevention:** Which technology is commonly employed for inline intrusion prevention, performing real-time traffic inspection and filtering?

Accepted Answer

Stateful Packet Inspection (SPI)

Answer

Security Information and Event Management (SIEM)

Answer

Network Address Translation (NAT)

Answer

Virtual Private Network (VPN)

Question 21

**Honeynet Purpose:** What is the primary objective of deploying a honeynet?

Accepted Answer

To attract and study attackers in a controlled environment.

Answer

To passively monitor network traffic for suspicious activity.

Answer

To actively block malicious traffic from entering a network.

Question 22

**IDS/IPS Deployment Best Practice:** Which of the following strategies is recommended for effective IDS/IPS deployment?

Accepted Answer

Deploying IDS/IPS at multiple strategic locations along the network path.

Answer

Configuring IDS/IPS to alert only for high-priority events.

Answer

Using the identical IDS/IPS vendor for all network segments.

Question 23

**Heuristic Detection Limitation:** What is the main drawback of utilizing heuristics in intrusion detection?

Accepted Answer

False positives (misidentifying legitimate traffic as malicious).

Answer

High computational resource consumption.

Answer

False negatives (failing to detect malicious traffic).

Question 24

**Security Operations Center (SOC) Responsibility:** Which of the following tasks is a core responsibility of a SOC regarding intrusion detection and prevention?

Accepted Answer

Monitoring alerts and responding to security incidents.

Answer

Creating security policies and procedures.

Answer

Conducting regular security audits.

Answer

Acquiring and implementing IDS/IPS devices.

Question 25

**Network Intrusion Detection System (NIDS):** What is the primary function of a NIDS?

Accepted Answer

Monitoring and analyzing network traffic for potential malicious activity.

Answer

Detecting and responding to malware infections.

Answer

Preventing unauthorized access to a network.