perimeter network
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Microsoft Exchange 2007
An Internet Protocol (IP) network segment that contains resources, such as Web servers and virtual private network (VPN) servers, that are available to Internet users. Also known as screened subnet. [Exchange 2007]
Technology› Operating System› Microsoft Windows
Microsoft Windows Server
One or more computers that have a connection to the Internet through an external screening router and a connection to the internal network through an interior screening router. Computers that are linked to the perimeter network have limited access to both the Internet and the internal network. This architecture is convenient if multiple hosts require direct Internet access.
Telecommunications
A network added between a protected network and an external network, in order to provide an additional layer of security. A perimeter network is sometimes called a DMZ.