Dear professor,

How should the Multicast Server keep track  of the clients? Can we  dedicate one server thread for each client for waiting to receiving ack from that client  on another port for 5 seconds and if it does not receive the acknowledgment, then unicast the message to that client again? In other words we will have two ports one for sending multicasts and one for receiving acks and sending unicast packet.

Thank You and Regards,

Gayaneh