What type of firewall architecture employs two network cards and a
single screening router?
A.
A dual-homed host firewall
B.
An application-level proxy server
C.
A screened-subnet firewall
D.
A screened-host firewall
Explanation:
Like a dual-homed host, a screened-host firewall uses two network cards to connect to the trusted
and untrusted networks, but adds a screening router between the host and the untrusted network.
* dual-homed host has two NICs but not necessarily a screening router.* screened-subnet firewall uses two NICs also, but has two screening routers with the host
Exhibit:
acting as a proxy server on its own network segment. One screening router controls traffic local to
the network while the second monitors and controls incoming and outgoing Internet traffic,
* application-level proxy, is unrelated to this question. Source: Hacker
Proof by Lars Klander (Jamsa Press, 1997).
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