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Network isolation technology has now developed to the fifth generation.The first generation of isolation technology actually physically separates the network to form information islands;the second generation adopts hardware card isolation technology;the third generation adopts data forwarding isolation technology;the fourth generation adopts air switch isolation technology;The fifth generation of isolation technology uses safe channel isolation technology.The latest isolation technology based on secure channels realizes the isolation and data exchange of internal and external networks through dedicated communication hardware and proprietary security protocols and other security mechanisms,which not only solves the problems of previous isolation technologies,but also effectively isolates internal and external networks.Open,and efficiently realize the secure exchange of internal and external network data,transparently support a variety of network applications,and become the development direction of the current isolation technology.

网络隔离技术目前已经发展到了第五代。第一代隔离技术实际上是将网络进行物理上的分开，形成信息孤岛;第二代采用硬件卡隔离技术;第三代采用数据转发隔离技术;第四代采用的是空气开关隔离技术;而第五代隔离技术采用了安全通道隔离技术。基于安全通道的最新隔离技术通过专用通信硬件和专有安全协议等安全机制，来实现内外部网络的隔离和数据交换，不仅解决了以前隔离技术存在的问题，还能有效地把内外部网络隔离开来，而且高效地实现了内外网数据的安全交换，透明支持多种网络应用，成为当前隔离技术的发展方向。