Packet Filtering Firewalls system is considered a?

A.
First generation firewall.

B.
Second generation firewall.

C.
Third generation firewall.

D.
Fourth generation firewall.

Explanation:
Firewall technology is a young but quickly maturing industry. The first generation of firewall
architectures has been around almost as long as routers, first appearing around 1985 and coming
out of Cisco’s IOS software division. These firewalls are called packet filter firewalls. However, the
first paper describing the screening process used by packet filter firewalls did not appear until 1988,
when Jeff Mogul from Digital Equipment Corporation published his studies. At this time we are in the
Fourth generation of firewall devices and software.