rpcbind provides a time service, primarily for use by secure RPC client-server time synchronization, available through the rpcb_gettime() function. pmap_getport() and rpcb_getaddr() can be used to get the port number of a registered service. rpcb_getaddr() communicates with any server running version 2, 3, or 4 of rcpbind. pmap_getport() can only communicate with version 2.