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Eccouncil Exam 312-38 Topic 9 Question 102 Discussion
Topic #: 9
A network designer needs to submit a proposal for a company, which has just published a web
portal for its clients on the internet. Such a server needs to be isolated from the internal network,
placing itself in a DMZ. Faced with this need, the designer will present a proposal for a firewall with
three interfaces, one for the internet network, another for the DMZ server farm and another for the
internal network. What kind of topology will the designer propose?
The topology that the network designer will propose is known as a screened subnet. This topology involves the use of two or more firewalls to create a network segment referred to as a demilitarized zone (DMZ). The DMZ acts as a buffer zone between the public internet and the internal network. It contains the public-facing servers, such as the web portal mentioned, which is isolated from the internal network for added security. The screened subnet topology typically includes a firewall at the network's edge connected to the internet, another firewall separating the DMZ from the internal network, and the DMZ itself. This setup allows for strict control of traffic between the internet, the DMZ, and the internal network, providing an additional layer of security.
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