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Multicast and unicast are UDP packets with dynamic source port and destination port 3119.
By default, multicasts are propagated within one network segment (to the nearest router). Forwarding multicasts to other network segments requires configuration on the router side.
Unicasts are useful if D2000 Servers are located on different network segments. It is necessary to enable the transfer of UDP packets on all firewalls between D2000 Servers (including Windows Firewall).
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