Which of the following would be the MOST secure firewal…

Which of the following would be the MOST secure firewall system?

Which of the following would be the MOST secure firewall system?

A.
Screened-host firewall

B.
Screened-subnet firewall

C.
Dual-homed firewall

D.
Stateful-inspection firewall

Explanation:
A screened-subnet firewall, also used as a demilitarized zone (DMZ), utilizes two packet filtering routers and a
bastion host. This provides the most secure firewall system, since it supports both network- and applicationlevel security while defining a separate DMZ network. A screened-host firewall utilizes a packet filtering router
and a bastion host. This approach implements basic network layer security (packet filtering) and application
server security (proxy services). A dual-homed firewall system is a more restrictive form of a screened-host
firewall system, configuring one interface for information servers and another for private network host
computers. A stateful-inspection firewall working at the transport layer keeps track of the destination IP address
of each packet that leaves the organization’s internal network and allows a reply from the recorded IP
addresses.



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