Your organization has a web server that must be accessible by external users. Which of the following options is the best location for the server?
Answer Description
A Demilitarized Zone (DMZ), sometimes called a Perimeter Network , is a separate area of a network designated for externally facing systems and servers. It is the logical place for a web server that requires external access.
Wikipedia
In computer security, a DMZ or demilitarized zone (sometimes referred to as a perimeter network) is a physical or logical subnetwork that contains and exposes an organization's external-facing services to an untrusted network, usually a larger network such as the Internet. The purpose of a DMZ is to add an additional layer of security to an organization's local area network (LAN); an external network node can access only what is exposed in the DMZ, while …
DMZ (computing) - Wikipedia, the free encyclopedia