Monitoring Website uptime once every 60-120 minutes is not very reliable method of determining server uptime. Such way of website monitoring gives an opportunity to catch the servers that out for long periods of time, but it is impossible to catch Web servers that intermittently have downtime for shorter periods of time. If tests are frequent the monitoring is much more exact, but the price is significantly higher. The more accurate method is to check every minute or so - for most individuals and organizations it is the only way to be sure that their web sever work without any faluress. Some companies even like to use server 'uptime' as a marketing gimmick - 'Hey, look everyone, 99,99% uptime' - which of course is not accurate - even load-balanced servers can experience a little downtime.