code: function isDefaultPort(protocol, port, defaultPorts)
  {
  	if (protocol !== null)
  	{
  		if (port === null) return true;
  		
  		if (isObject(defaultPorts) === false)
  		{
  			defaultPorts = _defaultPorts;
  		}
  		
  		return defaultPorts[protocol] === parseInt(port);
  	}
  	
  	// Uncertain
  	return null;
  }
docs: TODO :: documentation and tests