Which statement best describes permissions between NTFS and ext4?

Which statement best describes permissions between NTFS and ext4?

• A. NTFS uses POSIX permissions; ext4 uses ACLs.
• B. NTFS uses ACLs; ext4 uses ACLs as well.
• C. NTFS uses POSIX permissions; ext4 uses POSIX permissions.
• D. NTFS uses ACLs; ext4 uses POSIX permissions.

Answer: (D)

The key idea is that Windows NTFS and Linux ext4 use different permission models by default. NTFS relies on access control lists (ACLs), which allow detailed, per-user and per-group permissions for files and directories. Linux ext4, on the other hand, uses POSIX permissions by default, which assign read, write, and execute rights to the owner, the group, and others. Ext4 can also support ACLs as an extension, but the baseline model is POSIX permissions. So the statement that NTFS uses ACLs and ext4 uses POSIX permissions best describes how these filesystems handle access control.

The key idea is that Windows NTFS and Linux ext4 use different permission models by default. NTFS relies on access control lists (ACLs), which allow detailed, per-user and per-group permissions for files and directories. Linux ext4, on the other hand, uses POSIX permissions by default, which assign read, write, and execute rights to the owner, the group, and others. Ext4 can also support ACLs as an extension, but the baseline model is POSIX permissions. So the statement that NTFS uses ACLs and ext4 uses POSIX permissions best describes how these filesystems handle access control.