Fedora 16 -Which nfs services should be running

[Geoffrey Leach]

Newly installed Fedora 16 - I'm trying to wrap my head around 
systemctl; in particular the nfs services.

Does anyone have a pointer to _current_ doc for the nfs services?

Alternatively, what nfs services do I need to run? 

Here's what I have running now:

#systemctl|grep nfs
proc-fs-nfsd.mount        loaded active mounted       RPC Pipe File 
System
nfs-idmap.service         loaded active running       NFSv4 ID-name 
mapping daemon
nfs-lock.service          loaded active running       NFS file locking 
service.
nfs-server.service        loaded active running       NFS Server

FWIW, the client is running Fedoara 10. 
Connection is denied by the server to all of the exported file systems