wcf - How does Servicebus Relay relays to correct End Point -

i understand in order setup service bus need to

1. create service bus namespace
2. create on premise wcf , point above service bus end point through binding.

wcf knows service bus end point, how service bus relay know relay message specific wcf endpoint in whole world?

thanks.

service bus doesn't know endpoint is. endpoint makes connection service bus , service bus uses connection send requests (relayed requesting wcf client) wcf endpoint.

the whole point of service bus relay there no connections going azure on premises machines because of networking/nat/firewall issues. there connection on premises machine azure.