Managing Systems and Workgroups: A Guide for HP-UX System Administrators

Configuring a Workgroup
Compatibility Between HP-UX Releases 10.x and 11.x
Chapter 4 461
150001 1 tcp 720 pcnfsd
150001 2 tcp 720 pcnfsd
indicates that the server can serve both NFS PV2 and NFS PV3.