Rhineland, in the '20s

• Troop-free area (Abbr.)
• Former Vietnam area mostly S. of the 17th parallel
• One goes along the 38th parallel, briefly
• Part of a certain cease-fire agreement, for short
• Part of Korea, for short
• Middle ground, for short
• Korea divider: Abbr
• Wartime buffer (abbr.)
• Area between the two Koreas, briefly

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 ...