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Open ports are ideal for allowing the services and other applications to run smoothly and perform their functions without interference. The main function of an open port is that they provide the basis for good communication. Without the use of ports, communication can be not much smooth and might be disrupted.

There can be unusual times when several ports can be left open without knowing the real cause. Sometimes it can be due to the neglect of an employee or it can be due to a firewall configuration that can leave some ports open as well.

Full article: https://protectumus.com/blog/details/why-checking-...

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