.
Trying to call <code>connect()</code> on an already connected socket will result
in an <a href="errors.html#errors_err_socket_dgram_is_connected"><code>ERR_SOCKET_DGRAM_IS_CONNECTED</code></a> exception. If <code>address</code> is not
provided, <code>'127.0.0.1'</code> (for <code>udp4</code> sockets) or <code>'::1'</code> (for <code>udp6</code> sockets)
will be used by default. Once the connection is complete, a <code>'connect'</code> event
is emitted and the optional <code>callback</code> function is cal