Secure Operating Systems

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Questions and Answers

What are the three types of controls commonly used for managing risk?

  • Preventative, detective, corrective
  • Biometric, RFID, surveillance
  • Digital, virtual, physical
  • Physical, technical, administrative (correct)

Which type of control involves mechanisms like firewalls and antivirus software?

  • Environmental controls
  • Technical controls (correct)
  • Physical controls
  • Biometric controls

What is an example of a physical control used to prevent unauthorized access?

  • Antivirus software
  • Firewalls
  • Intrusion detection systems
  • Security badges and access cards (correct)

Which type of control includes solutions like authentication mechanisms and encryption measures?

<p>Technical controls (B)</p> Signup and view all the answers

What is the main function of detective controls?

<p>To detect unauthorized access (D)</p> Signup and view all the answers

Which type of control involves measures like security lighting, motion sensors, and CCTV surveillance?

<p>Physical controls (C)</p> Signup and view all the answers

What is the purpose of covert channels in the context of a secure operating system?

<p>To bypass security measures and transfer information between security domains (C)</p> Signup and view all the answers

How might a 'timing channel' function as a covert channel?

<p>By using a Trojan horse program to send information through alternating loops and waits (C)</p> Signup and view all the answers

What is a fundamental principle of IT security highlighted in the text?

<p>Protecting the organization's assets, including people, property, and data (C)</p> Signup and view all the answers

How are security controls related to an organization's risk management process?

<p>They are derived from the risk management process to mitigate risks to organizational assets (D)</p> Signup and view all the answers

Which of the following best describes the purpose of surveillance systems in IT security?

<p>To monitor and detect potential security threats or breaches (C)</p> Signup and view all the answers

Why is it challenging to prevent all covert channels within a secure operating system?

<p>Because there is no foolproof way to eliminate all methods of circumventing security barriers (D)</p> Signup and view all the answers

What do administrative controls refer to in an organization's security goals?

<p>Policies, procedures, or guidelines related to personnel or business practices (B)</p> Signup and view all the answers

Which of the following is an example of a preventive control?

<p>Antivirus software (B)</p> Signup and view all the answers

What is the primary purpose of detective controls?

<p>To alert to unwanted or unauthorized activity in progress or afterwards (B)</p> Signup and view all the answers

Among the options below, which one is NOT considered an administrative control?

<p>Firewalls (A)</p> Signup and view all the answers

Which security measure is categorized as a corrective control?

<p>Measures taken to repair damage after unwanted activity (A)</p> Signup and view all the answers

What do preventative controls aim to achieve?

<p>Stop unwanted or unauthorized activity from occurring (C)</p> Signup and view all the answers

According to the rules mentioned, the Simple Integrity Rule allows the subject to read files from which layers of secrecy?

<p>Same and Upper layers (B)</p> Signup and view all the answers

Which rule states that the subject can only write files on the Same and Lower layers of secrecy?

<p>Star Integrity Rule (B)</p> Signup and view all the answers

In the Clarke Wilson Security Model, what type of data items cannot be accessed directly by the Subject?

<p>Constrained Data Items (C)</p> Signup and view all the answers

Which entity in the Clarke Wilson Security Model is described as any user requesting Data Items?

<p>Subject (D)</p> Signup and view all the answers

What distinguishes the Unconstrained Data Items from Constrained Data Items in the Clarke Wilson Security Model?

<p>Access Restrictions (C)</p> Signup and view all the answers

What is a fundamental concern in the security of cyberspace and e-commerce?

<p>The security of operating systems (C)</p> Signup and view all the answers

Where do many known vulnerabilities in computer systems originate from?

<p>Operating systems (D)</p> Signup and view all the answers

How does the security of an operating system impact the overall security of a computer system?

<p>It has fundamental impacts on the overall security (B)</p> Signup and view all the answers

What can happen if there is a compromise of the underlying operating system?

<p>Exposure to danger for applications running on the system (B)</p> Signup and view all the answers

In what type of environment do modern information computer systems allow multiple applications to run concurrently?

<p>Time-sharing environment (B)</p> Signup and view all the answers

What does a lack of proper control and containment of application execution in an OS lead to?

<p>Increased vulnerability to attacks from other applications (D)</p> Signup and view all the answers

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