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Any TCP or UDP service port that receives traffic and provides services at that port address is said to be open.
Virtual points where network connections begin and stop are called ports. Ports are controlled by the operating system of a computer and are software-based. Each port is connected to a distinct procedure or service. Computers can quickly distinguish between different types of traffic thanks to ports: despite using the same Internet connection, emails go to a different port than webpages.
All network-connected devices use the same ports, and each port has a unique number. The majority of ports are set aside for specific protocols; for instance, port 80 is the designated location for all HTTP transmissions. Port numbers enable the targeting of particular services or applications within those devices, whereas IP addresses enable messages to move to and from specific devices.
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