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This test emulates a user accessing a web page on the cloud via HTTP(S), and reports whether that page is accessible or not. In the process, the test indicates the availability of the cloud over the web, and the time it took for the agent to access the cloud over the web. This way, issues in web-based access to the cloud come to light.

Measurement	Description	Measurement Unit	Interpretation
Availability	Indicates whether the test was able to access the configured URL or not	Percent	Availability failures could be caused by several factors such as the web server process(es) (hosting the configured web page) being down, the web server being misconfigured, a network failure, etc. Temporary unavailability may also occur if the web server is overloaded. Availability is determined based on the response code returned by the test. A response code between 200 to 300 indicates that the configured web page is available.
tcp_conn_avail	Indicates whether the test managed to establish a TCP connection to the configured URL.	Percent	Failure to establish a TCP connection may imply that either the web server process hosting the web page is not up, or that the process is not operating correctly. In some cases of extreme overload, the failure to establish a TCP connection may be a transient condition. As the load subsides, the web page may start functioning properly again.
dns_avail	Indicates whether the DNS server was able to respond successfully to the request made to it.	Percent	While the value 100 for this measure indicates that the DNS server is available and successfully responded to the request, the value 0 indicates that the DNS server is unavailable or is not responding to requests. Availability failures could be caused by many reasons such as a network failure. Sometimes, the DNS server may be reachable through basic network testing, but may not respond to DNS queries from clients.