A subnet placed outside of a firewall, that is very lightly protected is known as what?
Answer Description
A DMZ (Demilitarized Zone) is a physical or logical area of a network, that is facing an untrusted network, generally the internet. It is normally used for servers that need to be accessable from outside a network.
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