Does a packet filter policy work at the application, network, and transport layers to examine connection data?

A packet filter policy operates at the network and transport layers, primarily focusing on the header information of the packets being transmitted. This means it inspects aspects such as source and destination IP addresses, port numbers, and protocol types without examining the actual payload or connection data that would be more specific to the application layer.

Since packet filtering does not analyze data at the application level, it cannot evaluate the contents of the packets to enforce rules based on the applications generating the traffic. Therefore, the claim that a packet filter policy works at the application, network, and transport layers to examine connection data is incorrect. It is solely effective at the network and transport layers.