Packet filtering is a technique that controls the flow of network data by examining the headers of packets and applying a set of rules to accept or reject them. Packet filtering has some advantages, such as efficiency, cost-effectiveness, ease of use, and transparency3. However, it also has some disadvantages, such as low security and no screening above the network layer4. Packet filtering firewalls cannot inspect the payload of packets or the application layer protocols, which makes them vulnerable to attacks that exploit higher-level vulnerabilitie
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