Intrusion Prevention Systems (IPS) in Cybersecurity - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is an Intrusion Prevention System (IPS)?

An Intrusion Prevention System (IPS) is a security tool that monitors network or system activities for malicious behavior and can take automatic actions to block or prevent those threats.

beginner

How does an IPS differ from an Intrusion Detection System (IDS)?

An IPS not only detects threats like an IDS but also actively blocks or prevents them from causing harm, while an IDS only alerts about suspicious activity without stopping it.

intermediate

Name two common methods an IPS uses to detect threats.

An IPS commonly uses signature-based detection, which looks for known attack patterns, and anomaly-based detection, which identifies unusual behavior that may indicate an attack.

intermediate

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

A false positive occurs when the IPS mistakenly identifies normal activity as a threat and blocks it, which can disrupt legitimate network use.

beginner

Why is it important for an IPS to be placed inline in a network?

Placing an IPS inline means it sits directly in the path of network traffic, allowing it to actively block malicious traffic in real time before it reaches its target.

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

A To block and prevent malicious network activity

B To only alert about suspicious activity

C To store backup data securely

D To manage user passwords

An IPS actively blocks and prevents malicious activity, unlike systems that only alert.

Which detection method uses known attack patterns to identify threats?

A Anomaly-based detection

B Behavioral profiling

C Heuristic analysis

D Signature-based detection

Signature-based detection looks for known patterns or signatures of attacks.

What does a false positive in an IPS cause?

A Normal activity being blocked

B Missed detection of an attack

C Faster network speeds

D Automatic software updates

A false positive means normal activity is wrongly identified as a threat and blocked.

Where is an IPS typically placed to effectively block threats?

A Offline backup storage

B Inline within the network traffic path

C On user devices only

D In the cloud only

An IPS is placed inline to monitor and block traffic in real time.

Which of the following is NOT a function of an IPS?

A Detecting malicious activity

B Blocking harmful traffic

C Encrypting user data

D Alerting administrators

Encrypting user data is not a function of an IPS.

Explain what an Intrusion Prevention System (IPS) does and how it helps protect a network.

Think about how it acts like a security guard that not only watches but also stops bad actions.

Describe the difference between signature-based and anomaly-based detection methods used by IPS.

One looks for known bad signs, the other looks for anything unusual.