Which type of firewall filter can match incoming traffic to the corresponding outbound IP address connection by way of IP address and port?

A. Packet filtering
B. NAT filtering
C. Application-level gateway
D. Circuit-level gateway

B. NAT filtering matches incoming traffic to the corresponding outbound IP address connection. Packet filtering inspects each packet passing through the firewall and accepts or rejects it based on rules. Application-level gateways apply security mechanisms to specific applications. Circuit-level gateways apply security mechanisms whenever TCP or UDP connections are established.