You set up an administrative share called Data$. What is required for another user to access this share?

For another user to access an administrative share such as Data$, they must have the appropriate permissions assigned to that share. Administrative shares are typically hidden network shares that provide access to specific folders on a system, like the C: drive or specific directories like Data$. However, having access to these shares is contingent on user permissions set during the share configuration process.

By default, administrative shares grant access only to users with administrative privileges, but additionally, other users can be granted access if they have the necessary permissions assigned. This could be in the form of share permissions or NTFS permissions, which are enforced when accessing any shared resource. Therefore, without the correct permissions, the user will be denied access to the share, regardless of their network configuration or sharing settings.

The other options do not specifically pertain to the requirement for accessing an administrative share. Being part of a HomeGroup, knowing a decryption key, or enabling File Sharing in the Network and Sharing Center do not influence the ability to access an administrative share unless specified permissions are granted.