what port or ports are required for rpcbind (portmapper) to be running and available through the fir

For EMC NetWorker to communicate to DMZ Clients, what port or ports are required for rpcbind
(portmapper) to be running and available through the firewall?

A.
7938

B.
7937 and 7938

C.
7937-9936

D.
0-0