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.