The Get Network Service Status operator lets you communicate with a local or remote service, over TCP or UDP. You can use this operator to send data and then receive a reply. This operator can validate the reply against a predetermined pattern to determine if the network service is up. This type of validation enables the operator to report the status of the service and the computer that is hosting that service.
Note: You cannot send a binary message using this operator, because only strings (text) are supported.
TCP is a connection-oriented protocol. The operator lets you connect to the service, send data, then receive a reply that can be matched against a pattern. Another service can listen on the same port. Therefore, a successful connection does not necessarily mean that a given service is running.
UDP is a connection-less protocol. The operator does not connect to the service to get its status through UDP. To get the status, the operator sends a UDP message, reads the reply, and verifies that the reply data matches a pattern.
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