The Network Security Zones
Internet -The internet has no centralized governance in either technological implementation or policies for access and usage.This zone is the most vulnerable to security breaches as there are no blocks to stop intrusions.
Internet DMZ - The name DMZ (demilitarized zone) is an area between nation states in which there is no weapons or military operation is not allowed. The purpose of a DMZ is to add an additional layer of security to a local area network(LAN) where an external network can access only what is in the DMZ and the rest of the network is firewalled.
Production Network Zone - PNZ is a restricted zone which checks and controls access from uncontrolled zones. It is bounded by one or more firewalls that checks and filters incoming and outgoing traffic.
Intranet Zone - It is a controlled zone with one or more firewalls which is not heavily. restricted for use.
Management Network Zone - It is a highly secured zone where access is permitted for small number of users. For a required security one can create a secured zone that allows specified users to perform tasks and functions.