Tom is a networking manager in XYZ Inc. He and his team were assigned the task to store and update the confidential files present on a remote server using various network protocols. They needed to…

Tom is a networking manager in XYZ Inc. He and his team were assigned the task to store and update the confidential files present on a remote server using various network protocols. They needed to implement a system to avoid the use of cleartext protocols for file transfer. Tom implemented a system that limits the access only to his team. The per the methods/tools provided to him, to use NFS securely, he employed the process of limiting the superuser access to nobody and noexec by using authentication based on the user's privilege and identity. Identify the method employed by Tom for securing access controls in NFS?