NFS Confused Am I Using TCP or UDP

[BENCHMARKMAN]

I am trying to setup nfs and I am confused if I am using UDP or TCP. When I run rpcinfo -p on the server the output is below. Both UDP and TCP are listed, so how do I know which protcol I am using?

program vers proto port
100000 2 tcp 111 portmapper
100000 2 udp 111 portmapper
100005 1 udp 42891 mountd
100005 1 tcp 60165 mountd
100005 2 udp 42891 mountd
100005 2 tcp 60165 mountd
100005 3 udp 42891 mountd
100005 3 tcp 60165 mountd
100003 2 udp 2049 nfs
100003 3 udp 2049 nfs
100003 4 udp 2049 nfs
100021 1 udp 42440 nlockmgr
100021 3 udp 42440 nlockmgr
100021 4 udp 42440 nlockmgr
100021 1 tcp 36005 nlockmgr
100021 3 tcp 36005 nlockmgr
100021 4 tcp 36005 nlockmgr
100003 2 tcp 2049 nfs
100003 3 tcp 2049 nfs
100003 4 tcp 2049 nfs
100024 1 udp 40877 status
100024 1 tcp 49146 status

[Manko10]

The server listens to both. Whether you use TCP or UDP is specified when mounting the share. Either write

mount -o tcp 127.0.0.1:/foo /mnt/bar

or

mount -o udp 127.0.0.1:/foo /mnt/bar

If you don't specify the protocol the default should be TCP in NFSv4 but if you are unsure just specify that option explicitly.

EDIT:
To see how your share is currently mounted on your system look in /proc/mounts