def METHOD_NAME(self):
    """test NULL (default) security"""
    server = self.socket(zmq.DEALER)
    client = self.socket(zmq.DEALER)
    assert client.MECHANISM == zmq.NULL
    assert server.mechanism == zmq.NULL
    assert client.plain_server == 0
    assert server.plain_server == 0
    iface = 'tcp://127.0.0.1'
    port = server.bind_to_random_port(iface)
    client.connect("%s:%i" % (iface, port))
    self.bounce(server, client, False)