CISSP PRACTICE QUESTIONS – 20190806

PRP

  1. Which of the following best describes the control that access to data or resources is necessary for the performance of official duties?
    A. Separation of Duties
    B. Need-to-Know
    C. Least Privilege
    D. Job Rotation
  2. Which of the following best ensures that a person has been determined to be trustworthy?
    A. Security clearance
    B. Identification
    C. Need-to-Know
    D. Access Control
  3. Which of following is of most concern when determining if a HIDS or NIDS should be implemented as a safeguard?
    A. Analysis of the frequency of network attacks
    B. The effectiveness of the solution
    C. The risk exposure of being breached
    D. Identify, analyze, and evaluate the risks

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Accounting, Auditing, and Accountability

I3A

The diagram and the following concepts are addressed in the official study guide, (ISC)2 CISSP Certified Information Systems Security Professional Official Study Guide:

  • Auditing: recording a log of the events and activities related to the system and subjects.
  • Accounting (aka accountability): reviewing log files to check for compliance and violations in order to hold subjects accountable for their actions.

But I don’t agree with it,  I would address Accounting, Auditing, and Accountability as follows:

Accountability can be concluded through auditing, an independent and systematic security assessment. Accounting is the process of writing logs of the activities of subjects and objects. An audit trail is a collection of logs to conclude accountability. Log review is one of the most common security assessment techniques used in an information systems audit.

In summary,

  • Accountability is concluded by auditing.
  • Auditing is an independent and systematic security assessment; log review is one of the most common security assessment techniques.
  • Accounting produces logs as audit trails to support auditing.
  • Logs reflect the activities of the authenticated subject.

Your feedback and comment are always welcome!

Data Remanence Question

Data Remanence Question

The following is my response to the post as above from Luke’s CISSP group:

According to NIST SP 800-88 R1, it depends on the data types the system was processing or the system category. If the workstation in question was categorized as High impact system, the media must be purged, while Low or Medium be cleared (erase or delete).

Since this question does not provide a specific context, the BEST way to recycle and protect sensitive data from leaking is “purge”.

Data Sanitization

Is PPTP a Layer 2 or Layer 4 Protocol?

PPTP

The following is my response to the post as above from Luke’s CISSP group:

Definitions

  • A session is an interaction between two parties using a communication channel that can be set up and torn down by either party during a period of time.
  • A data link is a logical connection between two adjacent nodes for data transmission.

Justifications

  • PPTP is a protocol that sets up a VPN tunnel as a logical connection between the VPN client and the VPN server. PPTP works at the data link layer, or logical link control (LLC) layer specifically, in terms of its result, the tunnel.
  • The VPN client authenticates to the VPN server to set up the VPN tunnel as the communication channel that can be set up and torn down by either party during a period of time. From the perspective of the tunnel building process, it’s reasonable to argue that PPTP works at the session layer.

Personally, I consider PPTP a layer 2 (data link layer) protocol.