Which of the following protocols allows computers on different operating systems to share files and disk storage?

DNS (Domain Name System) resolves hostnames to IP addresses for network communication and provides no file sharing or shared storage functionality.

NFS was designed specifically to allow computers running different operating systems - including Unix, Linux, and Windows - to share files and disk storage transparently over a network. It operates as a distributed file system protocol, making remote storage appear as locally mounted volumes regardless of the underlying OS.

TFTP (Trivial File Transfer Protocol) is a lightweight UDP-based protocol used for transferring individual files such as firmware or boot images, and does not support shared disk storage or cross-platform filesystem mounting.

SNMP (Simple Network Management Protocol) is used to monitor and manage network devices and collect performance data from infrastructure components, not to share files or storage between systems.