Question

The process in which the header information of data packets that come into a network are examined based on a specific set of rules?

Answer 1

Answer:

In a software firewall, packet filtering is done by a program called a packet filter. The packet filter examines the header of each packet based on a specific set of rules, and on that basis, decides to prevent it from passing (called DROP) or allow it to pass (called ACCEPT).

you can see it from google