You are configuring services to be discoverable. The services must be discoverable without relying on a central server. Client applications that consume the services are on a network segment that is separate from the network segment that the services are located on.A firewall blocks all TCP ports between the two network segments, but allows other protocols to pass through.You need to ensure that the client applications can discover the services. What should you do?（）

A. Use ad-hoc discovery mode over HTT
B. Use ad-hoc discovery mode over UD
C. Use managed discovery mode over HTT
D. Use managed discovery mode over UD