关键词: 3G,移动办公,网络隔离,数据交换,网闸

Abstract: Network isolation technology is taken to increase importance to the system and network security in more companies．In order to slove the security problems in mobile office based on 3G network,network isolation is imported．This article pays more attention to technical theories,main functions and characteristics of network isolation.Finally we proposed the solution of security problem of mobile office in 3G based on network isolation technology．The practical application proves that the security solution has the advantages of simple design,fully separation and high security characteristics.

Key words: 3G,Mobile office,Network isolation,Data exchange,Netgap