PowerShell Test-NetConnection cmdlet verifies TCP port connectivity

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PowerShell's Test-NetConnection command can test TCP connectivity to specific ports without additional utilities. The cmdlet checks whether a computer can establish a connection to a specified destination port from its current network location. A successful result confirms TCP connectivity but doesn't verify application functionality behind that port. Test-NetConnection is part of PowerShell's NetTCPIP module and is not available in Command Prompt. Network differences between testing and application environments can produce different results due to firewalls or routing configurations.

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