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Datagram support commands

Datagram support commands allow you to send a message to a name or a group
name, or to broadcast a message to everyone on the network. These commands
also allow you to receive a datagram message from a name or a group name, or
from anyone on the network. Datagram support differs from session support in
several ways. The message is never acknowledged by the receiver, so it is up
to the sender and receiver to agree on their own network protocols. Message
lengths range up to 512 bytes with the Send command. If you specify more than
512 bytes for a Receive Datagram or Receive Broadcast command you will receive
only the maximum that is allowed for a Send Datagram or Send Broadcast
command.

Datagrams are smaller than session send commands and require additional
protocol interaction for reliable data transmission. For reliable trans-
missions, use session support.