By examining the “state” and “context” of the incoming data packets, it helps to track the protocols
that are considered “connectionless”, such as UDP-based applications and Remote Procedure
Calls (RPC). This type of firewall system is used in:

A.
first generation firewall systems

B.
second generation firewall systems

C.
third generation firewall systems

D.
fourth generation firewall systems

Explanation:
“Stateful Inspection Characteristics
The firewall maintains a state table that tracks each and every communication channel.
Frames are analyzed at all communication layers.
It provides a high degree of security and does not introduce the performance hit that proxy
firewalls introduce.
It is scaleable and transparent to users
It provides data tracking for tracking connectionless protocols such as UDP and ICMP
The stat and context of the data within the packets are stored and updated continuously.
It is considered a third-generation firewall.” Pg. 375 Shon Harris: All-in-One CISSP Certification
Not A:
“Packet filtering is the first generation firewall—that is, it was the first type that was created and
used, and other types were developed fall into different generations.” Pg 373 Shon Harris: All-inOne CISSP Certification