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Free SSCP Exam Braindumps (page: 109)

Page 109 of 269
PDF with 1074 Questions

Which of the following usually provides reliable, real-time information without consuming network or host resources?

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

Answer(s): A

Explanation:

A network-based IDS usually provides reliable, real-time information without consuming network or host resources.


Reference:

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



The fact that a network-based IDS reviews packets payload and headers enable which of the following?

  1. Detection of denial of service
  2. Detection of all viruses
  3. Detection of data corruption
  4. Detection of all password guessing attacks

Answer(s): A

Explanation:

Because a network-based IDS reviews packets and headers, denial of service attacks can also be detected.
This question is an easy question if you go through the process of elimination. When you see an answer containing the keyword: ALL It is something a give away that it is not the proper answer. On the real exam you may encounter a few question where the use of the work ALL renders the choice invalid. Pay close attention to such keyword.
The following are incorrect answers:
Even though most IDSs can detect some viruses and some password guessing attacks, they cannot detect ALL viruses or ALL password guessing attacks. Therefore these two answers are only detractors.
Unless the IDS knows the valid values for a certain dataset, it can NOT detect data corruption.


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 reviews system and event logs to detect attacks on the host and determine if the attack was successful?

  1. host-based IDS
  2. firewall-based IDS
  3. bastion-based IDS
  4. server-based IDS

Answer(s): A

Explanation:

A host-based IDS can review the system and event logs in order to detect an attack on the host and to determine if the attack was successful.


Reference:

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



What would be considered the biggest drawback of Host-based Intrusion Detection systems (HIDS)?

  1. It can be very invasive to the host operating system
  2. Monitors all processes and activities on the host system only
  3. Virtually eliminates limits associated with encryption
  4. They have an increased level of visibility and control compared to NIDS

Answer(s): A

Explanation:

The biggest drawback of HIDS, and the reason many organizations resist its use, is that it can be very invasive to the host operating system. HIDS must have the capability to monitor all processes and activities on the host system and this can sometimes interfere with normal system processing.
HIDS versus NIDS
A host-based IDS (HIDS) can be installed on individual workstations and/ or servers to watch for inappropriate or anomalous activity. HIDSs are usually used to make sure users do not delete system files, reconfigure important settings, or put the system at risk in any other way.
So, whereas the NIDS understands and monitors the network traffic, a HIDS's universe is limited to the computer itself. A HIDS does not understand or review network traffic, and a NIDS does not "look in" and monitor a system's activity. Each has its own job and stays out of the other's way.
The ISC2 official study book defines an IDS as:
An intrusion detection system (IDS) is a technology that alerts organizations to adverse or unwanted activity. An IDS can be implemented as part of a network device, such as a router, switch, or firewall, or it can be a dedicated IDS device monitoring traffic as it traverses the network. When used in this way, it is referred to as a network IDS, or NIDS. IDS can also be used on individual host systems to monitor and report on file, disk, and process activity on that host. When used in this way it is referred to as a host-based IDS, or HIDS.
An IDS is informative by nature and provides real-time information when suspicious activities are identified. It is primarily a detective device and, acting in this traditional role, is not used to directly prevent the suspected attack.
What about IPS?
In contrast, an intrusion prevention system (IPS), is a technology that monitors activity like an IDS but will automatically take proactive preventative action if it detects unacceptable activity. An IPS permits a predetermined set of functions and actions to occur on a network or system; anything that is not permitted is considered unwanted activity and blocked. IPS is engineered specifically to respond in real time to an event at the system or network layer. By proactively enforcing policy, IPS can thwart not only attackers, but also authorized users attempting to perform an action that is not within policy. Fundamentally, IPS is considered an access control and policy enforcement technology, whereas IDS is considered network monitoring and audit technology.
The following answers were incorrect:
All of the other answer were advantages and not drawback of using HIDS
TIP FOR THE EXAM:
Be familiar with the differences that exists between an HIDS, NIDS, and IPS. Know that IDS's are mostly detective but IPS are preventive. IPS's are considered an access control and policy enforcement technology, whereas IDS's are considered network monitoring and audit technology.


Reference:

Harris, Shon (2012-10-25). CISSP All-in-One Exam Guide, 6th Edition (Kindle Locations 5817- 5822). McGraw-Hill. Kindle Edition.
and
Schneiter, Andrew (2013-04-15). Official (ISC)2 Guide to the CISSP CBK, Third Edition : Access Control ((ISC)2 Press), Domain1, Page 180-188 or on the kindle version look for Kindle Locations 3199-3203. Auerbach Publications.



Page 109 of 269



Post your Comments and Discuss ISC SSCP exam with other Community members:

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