Select all statements that correctly describe network packet filtering at the IP layer? (Select all that apply) O a. IP packet filtering may either be applied to the perimeter of a network or to the individual hosts within a network, but it cannot be applied to both at the same time. O b. IP packet filtering determines which IP packets may flow into or out of a network or a computer. Oc. Most IP packet filtering firewalls determine what packets to filter based upon a set of rules which can be configured for a particular network or host. Od. Most IP packet filtering firewalls determine what to filter based upon the IP header fields.

Basically,  Packet filtering is one of the most popular and  widely available means to control access to networks.

It determines whether a packet is allowed to enter to the network or not.

This concept helps us to block the entry of illegitimate packets to the network and thus maintains a proper security in the network.