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Port checks determine the status of specific network ports. TCP (Transmission Control Protocol) establishes a reliable connection, while UDP (User Datagram Protocol) sends data without a preliminary connection.
Testing ports globally ensures your services aren't being inadvertently blocked by regional ISP firewalls or geoblocking rules configured on your server.
Verifying port availability is essential for system administrators configuring firewalls and deploying new services.
Results may vary depending on network conditions, routing paths, and server configuration.