UDP ------ UDP Broadcast Address

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 Use restrictions:

1. You can only broadcast on the same subnet. 

 

Advantage:

1. Udp clients only know the port number and needn't know ip, because Broadcast Address can be confirmed by subnet mask and ip.for example, ip is 10.120.10.2 and subnet mask is 255.255.255.0, than broadcast address is 10.120.10.255(udp client).

 

2. Udp clients can broadcast messages and udp server can receive messages. Only if udp servers receive messages from udp clients, udp servers can commnuicate with udp clients.

 

3. There can be multiple servers, and there can be multiple clients.

 

4. Regardless of whether there is a server, udp clients can broadcast, and regardless of whether there is a client, udp servers can listen.