text: how does dmz and mission critical networks work? in the network/data center world, what is the meaning of dmz network?  and what is the meaning of mission critical network?  how is the access between dmz and mission critical network work? dmz = demilitarized zone. it is a term used to define a network boundary and is used in firewall jargon. typically services you want to advertise to the outside world are located in a dmz. mission critical networks are systems that are closed looped doubly redundant and dual located. it is typically used when talking about disaster recovery. tx