They've tended to buggy NAT implementations (such as being unable to contact your external address from the inside network), limited settings, bad DHCP implementations, and the like.
它们已经趋向于有缺陷的NAT实现（如不能从内网连接外部地址）、有限的设置、不好的DHCP 实现之类。
Link encryption is an effective way to protect the data of inside network.
链路加密是保护内部网络数据安全的一种有效方法。
E-government technology is developed in domestic and overseas as new managing way, but its security is difficult problem because a lot of confidential information is involved in its inside network.
电子政务作为一种新型的政务管理技术，正在各国蓬勃发展，由于电子政务内部网络涉及大量的国家机密信息，因而安全问题成了电子政务的关键问题。
E-government technology is developed in domestic and overseas as new managing way, but its security is difficult problem because a lot of confidential information is involved in its inside network.
电子政务作为一种新型的政务管理技术，正在各国蓬勃发展，由于电子政务内部网络涉及大量的国家机密信息，因而安全问题成了电子政务的关键问题。
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