Bandwidth Issues

Important: Keep in mind that the HTTP sensor can create substantial bandwidth load because it is one of the sensors that transfers many bytes per requests (sometimes 1000 times more that a simple ping). So choosing a URL that only gives a small HTML page in return is recommended if you have to pay for the bandwidth (either for your connection or for your webserver). This is of course not a major problem in most LANs and Intranets, but bandwidth usage should always be monitored.

Remember: Requesting a 25kb web page with an interval of one minute creates a traffic of 36 MB per day or more than one Gigabyte per month!