DNS Server verifies that the DNS server is working. Database tests a database by connecting to it and performing a query. FTP connects to the FTP server and verifies that a file can be retrieved. E-mail checks mail by sending a mail message, and retrieving that message. URL Transaction verifies that a transaction can be performed, by checking a sequence of web pages and forms.
Ping determines whether the computer is running or needs a reboot.
Port monitors whether a specified service is running as expected. In its simplest basic form, port monitoring tells you if a program is up and running . A more sophisticated monitoring script can also tell you how well the program is performing. We can determine how long it takes to download a web page from your server, whether a financial transaction involving filling a web form, entering the data into a database and reporting completion can be carried out, or many other aspects of your server operation. All plans apply to Linux , Cobalt and co - located servers.