What is the DMZ (demilitarized zone)?(What is, Concept and Definition)

Alternatively known as DMZ host , DMZ is short for demilitarized zone and acts as a buffer zone between external (Internet) users and a private server (local or WAN).DMZs are often used by corporations and contain a device that accepts Internet traffic such as DNS, FTP, and web servers.

By default, DMZ is disabled on most routers to add an additional layer of security.However, port forwarding is enabled on a network router, the DMZ may also need to be enabled.