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Questions and Answers
Who determines who gains access to the data in a DAC model?
What is the concept of least privilege in access control?
What permissions does the Linux permission code 764 represent?
What access does the Linux permission code 764 give to the group?
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What is the main advantage of using a DAC model for access control?
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What is the primary focus of Linux-based access control?
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Why are Linux file permissions important for security professionals?
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What is a common mistake when configuring Linux file permissions?
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What is the primary benefit of understanding Linux file permissions?
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What is a key concept in Linux-based access control?
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What is the primary factor that Mandatory Access Control is based on?
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In the context of Linux-based access control, what type of control is used to restrict access based on a user's identity?
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What is the primary difference between Discretionary Access Control and Mandatory Access Control?
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What type of access control is depicted in Figure 1.3?
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What is the significance of the classification level of the data in Mandatory Access Control?
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Study Notes
Linux-Based Access Control
- Linux file permissions are a crucial aspect of the Security+ exam, despite not being explicitly mentioned in the exam objectives.
Discretionary Access Control (DAC)
- In a DAC model, the owner of the data determines who gains access to it.
Least Privilege
- Least privilege is a principle that grants users only the minimum level of access and privileges required to perform their tasks.
Linux File Permissions
- The Linux permission of 764 grants the following access: • Owner: Read, Write, and Execute (7) • Group: Read and Write (6) • Others: Read (4)
Example of DAC File Permissions
- A user named Ian has Read and Read & Execute permissions, as illustrated in Figure 1.3.
Mandatory Access Control (MAC)
- MAC is based on the classification level of the data, unlike DAC which is based on the owner's discretion.
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