de></a> will instruct the socket to begin listening for datagram
messages. When <code>address</code> and <code>port</code> are not passed to <a href="#dgram_socket_bind_port_address_callback"><code>socket.bind()</code></a> the
method will bind the socket to the "all interfaces" address on a random port
(it does the right thing for both <code>udp4</code> and <code>udp6</code> sockets). The bound address
and port can be retrieved using <a href="#dgram_socket_address"><code>socket.address().address</code></a> 