The popularity and development of computer and communication networks has fundamentally changed the human way of life and productivity.But the network also has inevitable information security, today widely used in the network,we should understand the network security, proper precautionary measures.%计算机和通讯网络的普及和发展从根本上改变了人类的生活方式与工作效率。但网络中还存在着不可避免的信息安全隐患,在网络广泛使用的今天,我们更应该了解网络安全,做好防范措施。
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