I have a desktop computer manufactured by Dell. I use Windows xp O/S . I do not know much about computer systems as I belong to a commercial field but I know a few things about viruses and their ill effects. I think a Windows O/S provide a firewall to protect this unwanted viruses. But what is packet filtering, many network protocols use packet filtering to prevent the virus attack. Can anyone please explain what sort of packets are being filtered in here?
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