美军GIG基于VPN的作战网络域构建技术

全球信息栅格（GIG）是美军正在建设的重要基础设施，其重要的功能就是实现各个军兵种的互联互通。GIG3．0中提出了作战网络域的概念，明确采用VPN隔离技术实现不同安全等级网络的互联。首先介绍了GIG不同版本间的演进关系，进而给出了GIG3．0的变化，包括网电联合作战区域和作战网络域的提出，重点阐述了OND与DISN的连接关系，以及OND的网络构成，最后列举了支撑OND的四种关键VPN技术。

VPN-based Operational Network Domain of GIG for US Armed Forces

GIG is the key defense infrastructure of US armed forces under construction, which aims to a- chieve the connection of each US armed force. The concept of Operational Network Domain proposed in GIG 3.0 indicates the adoption of VPN technique in implementing the inter-connection and inter-oporabil- ity of networks with different security levels. This paper introduces relationship of the three GIG versions, and gives the highlights of GIG3.0, including Cyber Joint Operations Area and Operational Network Do- main. The connection of OND and DISN and the network constitution of OND are emphatically addressed. Finally, the four VPN techniques in support of OND are described.