4.5 Operating System Security

Question 1

What is Active Directory?

Answer 1

A database containing all components of a network, including user accounts, devices, file shares, and printers.

Active Directory allows for centralized management of network resources.

Question 2

What is stored in the Active Directory database?

Answer 2

User accounts, computers, devices, file shares, printers, security groups, and network components.

This central repository facilitates authentication and permission management.

Question 3

How do users authenticate to devices in a network using Active Directory?

Answer 3

By using their username and password defined in the Active Directory database.

This process centralizes user authentication across the network.

Question 4

What is the purpose of assigning permissions in Active Directory?

Answer 4

To control access to resources and manage user rights.

Permissions can be assigned to individual users or groups.

Question 5

What is group policy in the context of Active Directory?

Answer 5

A feature that allows the application of security policies and configuration settings to users and devices.

Group policy is managed through the Group Policy Management Editor.

Question 6

What can be configured using group policy?

Answer 6

Login scripts, network configurations, and security parameters.

Group policy enables centralized management of user and device settings.

Question 7

What does discretionary access control mean in Linux?

Answer 7

Users have the discretion to assign rights and permissions to different resources.

This model allows flexibility but may not be suitable for all environments.

Question 8

What is mandatory access control?

Answer 8

A system where all rights and permissions are assigned by a central administrator.

This approach enhances security in sensitive environments.

Question 9

What is Security-Enhanced Linux (SELinux)?

Answer 9

A set of patches that provides mandatory access control in Linux environments.

SELinux allows administrators to enforce security policies based on least privilege.

Question 10

What does the principle of least privilege entail?

Answer 10

Associating rights and permissions with users to allow only necessary actions.

This limits the potential damage from security breaches or malicious code.

Question 11

Is SELinux open source?

Answer 11

Yes, SELinux is open source and can be installed on various Linux distributions.

This availability promotes broader adoption and customization.