What Is Packet Filtering?
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Packet filtering is a type of network security technology that allows or blocks data packets from entering or leaving a network based on a set of predetermined rules. It is typically used to protect networks from malicious or unwanted traffic, and is one of the most commonly used methods of network security. Packet filtering can be used to control the types of traffic that can access the network, as well as the types of traffic that can leave the network. It can also be used to limit the types of data that can be sent, or to only allow certain types of traffic. Packet filtering is usually done at the firewall.