J06: Network Based Security I (PE)

Question 1

True or False: Placing the IPS behind the firewall reduces the number of alerts and allows for better data about potential security violations.

Answer 1

True

Question 2

Fill in the blank: The IPS typically sits __________ and provides a layer of analysis that negatively selects for dangerous content.

Answer 2

behind the firewall

Question 3

Network

Host-based

VM-based

Perimeter-based

These are all categories of what?

• Intrusion Protection System
• Snort
• Intrusion Detection System
• Social Engineering

Answer 3

Intrusion Detection System

Question 4

True or False: Positioning an IDS inside the firewall will typically cover exploits that originate from inside your network targeting your hosts.

Answer 4

False

Question 5

What are the two main types in Intrusion Detection Systems? (Use format: xxx and xxx)

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Answer 5

signature based and heuristic

Question 6

Jim is a senior network administrator at a large company. Recently the company had suffered a breach costing nearly half a million dollars. Following the attack Jim’s company hired a cybersecurity firm to perform penetration tests on their network and the pentesters from the cybersecurity firm found several vulnerabilities to their network, and also noted the need for an IDS. After receiving the report from the cybersecurity firm, Jim implemented an independent IDS that identifies intrusions by examining network traffic and monitors multiple hosts. Which IDS category has Jim implemented in his network?

Question 7

True or False: Because traffic flows through an Intrusion Prevention System, very rarely does an IPS cause degradation in network performance.

Answer 7

False

Question 8

Jim is a senior network administrator at a large company. Recently the company had suffered a breach costing nearly half a million dollars. Following the attack Jim’s company hired a cybersecurity firm to perform penetration tests on their network and the pentesters from the cybersecurity firm found several vulnerabilities to their network and provided a report detailing ways to help fix these issues. One of the pentesters was able to modify several access control lists, and obtain password files without setting off any alarms. To make sure that this does not happen again, what category of IDS would help detect these actions in the future?

Question 9

Which type of Intrusion Detection System builds a model of acceptable behavior and flag exceptions to the model?

Answer 9

heuristic

Question 10

Match the IPS functions with the appropriate definition: This approach requires administrators to configure security policies according to organizational security policies and the network infrastructure.

• Anomaly Detection
• Signature-Based Detection
• Perimeter-Based Detection
• Policy-Based

Answer 10

Policy-Based

Question 11

Match the category of intrusion detection system with its definition: An agent on a host that identifies intrusions by analyzing system calls, application logs, file-system modifications (binaries, password files, capability databases, access control lists and so on) and other host activities and state.

• Perimeter-based Intrusion Detection System
• Network Intrusion Detection System
• Host-based Intrusion Detection System
• VM based Intrusion Detection System

Answer 11

Host-Based Intrusion Detection System

Question 12

• Match the IPS functions with the appropriate definition: Based on patterns that are known to be malicious. It also adds to the record every time something new that is a threat comes across.
• Perimeter-Based Detection
• Signature-Based Detection
• Policy-Based
• Anomaly Detection

Answer 12

Signature

Question 13

Match the category of intrusion detection system with its definition: VMIDS detects intrusions using virtual machine monitoring. By using this, we can deploy the intrusion detection system with virtual machine monitoring.

• Host-based Intrusion Detection System
• VM based Intrusion Detection System
• Perimeter-based Intrusion Detection System
• Network Intrusion Detection System

Answer 13

VM based Intrusion Detection System

Question 14

True or False: Much like an IDS, firewalls can also detect and alert when an attack takes place.

Answer 14

False

Question 15

True or False: When first implementing a IPS on a network it is best to have it set up on the strictest settings allowed until healthy behavior is identified.

Answer 15

True

Question 16

Match the category of intrusion detection system with its definition: Detects and pinpoints the location of intrusion attempts on perimeter fences of critical infrastructures.

• Perimeter-based Intrusion Detection System
• Host-based Intrusion Detection System
• Network Intrusion Detection System
• VM based Intrusion Detection System

Answer 16

Perimeter-based Intrusion Detection System

Question 17

Fill in the blank: ________ is a device, typically another separate computer, that monitors activity to identify malicious or suspicious events.

Answer 17

intrusion detection system

Question 18

• Match the IPS functions with the appropriate definition: This takes samples of network traffic at random and compares them to a pre-calculated baseline performance level.
• Anomaly Detection
• Perimeter-Based Detection
• Signature-Based Detection
• Policy-Based

Answer 18

Anomaly Detection

Question 19

Which type of Intrusion Detection System performs simple pattern-matching and report situations that match a pattern corresponding to a known attack type?

Answer 19

signature based

Question 20

True or False: The IPS actively analyzes and takes automated actions on all traffic flows that enter the network.

Answer 20

True

Question 21

What are the two categories of Signature-Based detection? (Use format xxx xxx and xxx xxx)

Question 22

Jim is a senior network administrator at a large company. Recently Jim has implemented several Intrusion Prevention Systems within his network. Once the IPS’ were implemented Jim began noticing a severe degradation to the network. What is likely the reason why the network is in such a degraded state?

• The IPS was not configured properly
• Too Many Users
• Firewalls are interfering with the IPS
• Tiny ogres are destroying the system

Answer 22

The IPS was not configured properly ?

Question 23

True or False: Most often an IDS is deployed behind the firewall on the edge of your network.

Answer 23

True

Question 24

Jim is a senior network administrator at a large company. Recently the company had suffered a breach costing nearly half a million dollars. Following the attack Jim’s company hired a cybersecurity firm to perform penetration tests on their network and the pentesters from the cybersecurity firm found several vulnerabilities to their network. After receiving the report on the penetration tests that took place, Jim decided to implement a device that would both monitor the network and detect when any adverse actions took place, but also wanted the device to stop dangerous actions from happening as well. Based on this use case, what should Jim implement that would meet this criteria?

Answer 24

ips

Question 25

Fill in the blank: _________ is a network security/threat prevention technology that examines network traffic flows to detect and prevent vulnerability exploits.

Answer 25

ips

Question 26

True or False: When an IDS detects malicious software or suspicious actions it immediately reacts by stopping the actions or malware from executing in order to protect the network.

Answer 26

False

Question 27

Which is NOT one of the three categories that heuristic intrusion detection activity can be categorized as?

• Good/Benign
• Suspicious
• Unknown
• Dangerous

Answer 27

Dangerous

Question 28

Which is NOT one of the four main components of an IDS:

• Database (Knowledge)
• Database (Configuration)
• Database (Sensor)
• Detection Engine (Sensor)

Answer 28

Database (Sensor)