B.Packet filtering
Packet filtering is the process of examining each packet that passes through a firewall and determining whether it should be allowed or denied based on a set of predefined rules. It involves analyzing the characteristics of each packet, such as source and destination IP addresses, ports, and protocols, to make decisions on whether to permit or block them.
Packet filtering is one of the fundamental methods used to control network traffic and enforce security policies. It is an essential component of a firewall's functionality and helps in preventing unauthorized access to a network by allowing or restricting specific types of packets.
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