Enables client side service or application to connect to the server side service or application
for Ex. outlook connects to the exchange server by RPC, DNS client connects to the DNS server service by RPC.
when managing a disk remotely, the local disk management snap-in connects to the remote host disk management snap-in by RPC, look at the dependencies of the service and you will find alot of services and tools that denpends on RPC,
yes, you can restart RPC service