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Free SSCP Exam Braindumps (page: 108)

Page 108 of 269
PDF with 1074 Questions

Which of the following best describes signature-based detection?

  1. Compare source code, looking for events or sets of events that could cause damage to a system or network.
  2. Compare system activity for the behaviour patterns of new attacks.
  3. Compare system activity, looking for events or sets of events that match a predefined pattern of events that describe a known attack.
  4. Compare network nodes looking for objects or sets of objects that match a predefined pattern of objects that may describe a known attack.

Answer(s): C

Explanation:

Misuse detectors compare system activity, looking for events or sets of events that match a predefined pattern of events that describe a known attack. As the patterns corresponding to known attacks are called signatures, misuse detection is sometimes called "signature-based detection."
The most common form of misuse detection used in commercial products specifies each pattern of events corresponding to an attack as a separate signature. However, there are more sophisticated approaches to doing misuse detection (called "state-based" analysis techniques) that can leverage a single signature to detect groups of attacks.


Reference:

Old Document:
BACE, Rebecca & MELL, Peter, NIST Special Publication 800-31 on Intrusion Detection Systems, Page 16.
The publication above has been replaced by 800-94 on page 2-4
The Updated URL is: http://csrc.nist.gov/publications/nistpubs/800-94/SP800-94.pdf



Which of the following is used to monitor network traffic or to monitor host audit logs in real time to determine violations of system security policy that have taken place?

  1. Intrusion Detection System
  2. Compliance Validation System
  3. Intrusion Management System (IMS)
  4. Compliance Monitoring System

Answer(s): A

Explanation:

An Intrusion Detection System (IDS) is a system that is used to monitor network traffic or to monitor host audit logs in order to determine if any violations of an organization's system security policy have taken place.


Reference:

KRUTZ, Ronald L. & VINES, Russel D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, 2001, John Wiley & Sons, Page 48.



Which of the following monitors network traffic in real time?

  1. network-based IDS
  2. host-based IDS
  3. application-based IDS
  4. firewall-based IDS

Answer(s): A

Explanation:

This type of IDS is called a network-based IDS because monitors network traffic in real time.


Reference:

KRUTZ, Ronald L. & VINES, Russel D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, 2001, John Wiley & Sons, Page 48.



A host-based IDS is resident on which of the following?

  1. On each of the critical hosts
  2. decentralized hosts
  3. central hosts
  4. bastion hosts

Answer(s): A

Explanation:

A host-based IDS is resident on a host and reviews the system and event logs in order to detect an attack on the host and to determine if the attack was successful. All critical serves should have a Host Based Intrusion Detection System (HIDS) installed. As you are well aware, network based IDS cannot make sense or detect pattern of attacks within encrypted traffic. A HIDS might be able to detect such attack after the traffic has been decrypted on the host. This is why critical servers should have both NIDS and HIDS.
FROM WIKIPEDIA:
A HIDS will monitor all or part of the dynamic behavior and of the state of a computer system. Much as a NIDS will dynamically inspect network packets, a HIDS might detect which program accesses what resources and assure that (say) a word-processor hasn\'t suddenly and inexplicably started modifying the system password-database. Similarly a HIDS might look at the state of a system, its stored information, whether in RAM, in the file-system, or elsewhere; and check that the contents of these appear as expected.
One can think of a HIDS as an agent that monitors whether anything/anyone - internal or external - has circumvented the security policy that the operating system tries to enforce. http://en.wikipedia.org/wiki/Host-based_intrusion_detection_system



Page 108 of 269



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