Which type of firewall blocks packets based on rules that are based on IP addresses or ports?

Which type of firewall blocks packets based on rules that are based on IP addresses or ports?

A.
packet filtering

B.
stateful packet inspection

C.
NAT filtering

D.
Application-level gateway

Explanation:
Section Reference: Defining Firewalls and Other Perimeter Security Devices
Packet filtering inspects each packet that passes through the firewall and accepts or rejects it based on a set
of rules. A stateless packet filter, also known as pure packet filtering, is based on IP addresses andport
numbers.