(With the rapid development of computer technology, information network has become an important guarantee for social development. Many of them are state secrets and even sensitive information. Therefore, it is bound to attract all kinds of man-made attacks from all over the world. At the same time, network entities have to withstand the tests of flood, fire, earthquake, electromagnetic radiation and so on. This set of live video of Xiaodi 2019 safety training is released by the author himself. Those who like network security can download and learn~)
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