Which of the following utilities would BEST help diagnose NAS mount points?

`route` displays the IP routing table, which is useful for verifying network paths but does not directly reveal issues with the local network interface configuration itself.

`ping` tests basic network connectivity to a remote host but does not provide details about the local network interface's configuration or the status of mount points.

`ifconfig` (or `ip addr` on modern Linux systems) displays detailed information about network interfaces, including their IP address, subnet mask, and status (up/down). Diagnosing NAS mount points often begins by ensuring the client's network interface, which connects to the NAS, is correctly configured and operational. If the interface is down, has an incorrect IP, or is on the wrong subnet, the NAS mount will fail, making `ifconfig` an essential first step.

`nfsstat` provides statistics related to the NFS protocol, which is useful for troubleshooting NFS-specific performance or connectivity issues, but it does not diagnose the fundamental local network interface configuration required for any network connection.