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</p> Signup and view all the answers

    What is the main function of detective controls?

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

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

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

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

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

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

    <p>Firewalls</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</p> Signup and view all the answers

    What do preventative controls aim to achieve?

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

    Where do many known vulnerabilities in computer systems originate from?

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

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