Packet Filtering

Packet filtering is a security process used by computer networks to control which data packets can enter or leave a system. It examines information such as source and destination addresses, and port numbers, to decide if the packet should be allowed through or blocked. Think of it as a security gate that reviews each piece of data based on set rules, helping prevent unauthorized access or harmful data from reaching the network. This method helps protect networks from threats while allowing legitimate communication to pass smoothly.