Middle ground, for short

• Korean border area, for short
• Neutral area, for short
• Neutral area between N. and S. Korea
• Former Vietnam area mostly S. of the 17th parallel
• One goes along the 38th parallel, briefly
• An armistice may create it (abbr.)
• GI-free buffer

Wikipedia Word definitions in 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 a usually larger and untrusted network, usually ...