Sometimes while performing troubleshooting of an application or just testing whether you can access something across the network, being unable to connect to a required port on another system can impact an application or service that needs access. Back in the day we had the Telnet client available on our systems to quickly attempt a connection to the port and determine if it is open, but now that is more of an optional feature that is not installed by default and could actually be disallowed from being installed. This means that another approach is necessary in order to perform a port check.
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