December 2015
Intermediate to advanced
292 pages
6h 16m
English
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UDP and multicasting
Multicasting is a useful technique to use if you need to send messages to a group on a periodic basis. It uses a UDP server and one or more UDP clients. To illustrate this capability, we will create a simple time server. The server will send a date and time string to clients every second.
Multicasting will send an identical message to every member of a group. A group is identified by a multicast address. A multicast address must use the following IP address range: 224.0.0.0 through 239.255.255.255. The server will send a message mark with this address. Clients must join the group before they can receive any multicast messages.
Creating a multicast server
A MulticastServer class is declared next, where a DatagramSocket instance ...
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