Which NFS protocol should be used when mounting a remote server?

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The correct protocol to choose when mounting a share from an NFS server depends on what protocol the server exports and which versions that the client system can mount.

Server:

Red Hat Enterprise Linux 2.1 default defaults to exporting version 2
Red Hat Enterprise Linux 3  defaults to exporting version 3.
Red Hat Enterprise Linux 4  defaults to exporting version 3, but ...

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Which NFS protocol should be used when mounting a remote server?

Server:

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