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DNS - Checks if a DNS server is running well by querying the 'A' and 'MX' records. |
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FTP - Checks if a FTP server is running well by connecting to the FTP server. |
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HTTP - Checks if a web server is running well by requesting for a particular URL. |
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DBMS - Checks if a DBMS is running well by using ODBC connection. |
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PING - Checks a server for availability by sending ICMP Echo commands and wait for the responds. |
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POP3 - Checks the POP3 server by establishing a connection and retrieving emails. |
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PORT - Checks servers by challenging a specific TCP/IP port. |
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SMTP - Checks the SMTP server by establishing a connection and sending emails. |
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