Question

Which of the following is / are the types of firewall?

(a) Packet Filtering Firewall

(b) Dual Homed Gateway Firewall

(c) Screen Host Firewall

(d) Dual Host Firewall

The question was posed to me in an interview.

The origin of the question is Firewalls topic in section Network Layer of Computer Network

Answer 1

Right option is (a) Packet Filtering Firewall

To elaborate: A firewall can be a PC, a midrange, a mainframe, a UNIX workstation, a router, or combination of these. Depending on the requirements, a firewall can consist of one or more of the following functional components: Packet-filtering router