The following file sharing protocols rely on external directory services to provide user identity information:
SMB (CIFS)
NFSv3 with extended groups
NFSv4
Cloud Volumes Service for Google Cloud relies on Microsoft Active Directory for directory services.
Active Directory provides services including an LDAP server for looking up objects, a DNS server to resolve hostnames, and a Kerberos server for authentication. Objects include:
Users
Groups
Machine accounts
For best practices, see DNS recommendations.
For more information on Active Directory, see Active Directory: Design Considerations and Best Practices.