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Questions and Answers
What is the primary purpose of network segmentation?
What is the primary purpose of network segmentation?
- To completely isolate all systems from each other.
- To protect sensitive systems by limiting access based on network location. (correct)
- To simplify user access to all organizational resources.
- To enable unrestricted communication between all systems.
Which of the following best describes isolation in networking?
Which of the following best describes isolation in networking?
- The process of allowing systems to communicate freely.
- Removing a system from all access to outside networks. (correct)
- Creating complex rulesets for user access.
- A method of limiting users based on time-of-day access.
What does rule-based access control (RBAC) use to determine access permissions?
What does rule-based access control (RBAC) use to determine access permissions?
- A pre-defined schedule for user logins.
- A set of rules or access control lists (ACLs). (correct)
- Contextual information about users.
- User roles within an organization.
In which scenario would attribute-based access control (ABAC) be most beneficial?
In which scenario would attribute-based access control (ABAC) be most beneficial?
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What is a significant downside of attribute-based access control (ABAC)?
What is a significant downside of attribute-based access control (ABAC)?
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What do time-of-day restrictions help to prevent?
What do time-of-day restrictions help to prevent?
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What does the principle of least privilege advocate?
What does the principle of least privilege advocate?
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Which of the following is NOT a characteristic of segmentation?
Which of the following is NOT a characteristic of segmentation?
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Study Notes
Network Segmentation and Isolation
- Sensitive systems are placed on separate networks to limit access.
- Segmentation: Systems within the network can communicate with restrictions to systems outside the network.
- Isolation: Complete separation from external networks.
Rule-Based Access Control (RBAC)
- Uses a set of rules or access control lists (ACLs) to define access.
- Checks access attempts to an object against rules.
- Firewalls use rule-based access control.
Attribute-Based Access Control (ABAC)
- Policies are based on user attributes.
- Creates complex rulesets based on attribute combinations.
- Flexible due to context-specific attribute settings.
- Complex to manage effectively.
- Useful for enterprise systems with varying user roles and rights.
- Also used in databases, content management systems, microservices, and APIs.
Time-of-Day Restrictions
- Limit the time of day when activities can occur.
- Windows example: Logon hours set in Active Directory to enforce work hours.
- Prevents account misuse and unauthorized access.
Least Privilege
- Users and accounts should have the minimum permissions needed for their roles.
- A core concept throughout information security practices.
- Essential for designing permission and access schemes.
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