NFS server support for NFS version 2 (DEPRECATED)

configname: CONFIG_NFSD_V2

Linux Kernel Configuration
└─>File systems
└─>Network File Systems
└─>NFS server support for NFS version 2 (DEPRECATED)
In linux kernel since version 6.2 (release Date: 2023-02-19)  
NFSv2 (RFC 1094) was the first publicly-released version of NFS.
Unless you are hosting ancient (1990's era) NFS clients, you don't
need this.

If unsure, say N.