Why does Nmap show closed ports

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I’ve been running Nmap scans, and I’ve noticed that some ports show as closed rather than filtered or open. Can someone explain what it means when Nmap shows a port as closed and why this would happen? Does it indicate that a service or firewall is actively blocking the port?

1 day ago in Cyber Security & Ethical Hacking by Anupam
• 8,530 points • 10 views

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