rpcinfo -T tcp|udp Host Programm Version rpcinfo -T tcp|udp -p Host rpcinfo -T tcp|udp -b Programmversion rpcinfo -T tcp|udp ...

rpcinfo [-T tcp|udp] [Host [Programm [Version]]] 
rpcinfo [-T tcp|udp] -p [Host] 
rpcinfo [-T tcp|udp] -b Programmversion 
rpcinfo [-T tcp|udp] -d Programmversion 
rpcinfo              -t Hostprogramm [Version] 
rpcinfo              -u Hostprogramm [Version] 
rpcinfo -?