A stateful packet inspection firewall reviews the same packet information as a packet filtering firewall but also records information about TCP connections.

Question

Quizplus · Accepted Answer

A stateful packet inspection (SPI) firewall not only examines the header information like source and destination IP addresses, port numbers, and packet type (similar to what a packet filtering firewall does) but also keeps track of the state of active connections (e.g., TCP connection establishment and tear-down) and makes decisions based on the context of the packets within those connections.

A Stateful Packet Inspection Firewall Reviews the Same Packet Information