Which flag in the smb.conf file allows for case-sensitive naming?

The option "case sensitive = yes" is the correct choice because it explicitly sets the configuration parameter in the smb.conf file, which is used by Samba to define how it handles case sensitivity in file and directory names. When this parameter is set to "yes," Samba treats filenames as case sensitive, allowing files to be distinguished by case. This means that files named "example.txt" and "Example.txt" would be considered different files, which is important in environments where case sensitivity is required for compatibility with certain applications or operating systems, such as UNIX or Linux.

The other options do not conform to the proper syntax or do not accomplish the desired functionality. "case sensitive" on its own lacks the necessary value and equal sign to designate it as a complete configuration directive. "case match" is not a recognized parameter in the context of Samba configuration, whereas "case preserve" relates to the preservation of the case of filenames rather than enabling or disabling case sensitivity itself. Thus, setting "case sensitive = yes" is the proper way to ensure that the naming convention allows for different casing in Samba shares.