In order to enable Linux hosts to access a NAS share, which of the following protocols MUST be enabled?

Network File System (NFS) is a distributed file system protocol that allows a user on a client computer to access files over a computer network much like local storage. It is the de facto standard protocol used for sharing files between Unix-like systems, including Linux hosts, and is therefore essential for accessing NAS shares from Linux.

SSH (Secure Shell) is a secure remote access protocol for command-line access and file transfer (SCP/SFTP), not for mounting network shares directly.

Telnet is an insecure remote access protocol for command-line access and is not used for file sharing.

CHAP (Challenge-Handshake Authentication Protocol) is an authentication protocol used primarily in PPP connections or sometimes in iSCSI, not a file sharing protocol for NAS.