(This is a course about the whole stage of hcia-hcip-hcie security, but in the hcie part, there is no in-depth explanation of IE level security technology, only IE theory and security infrastructure, which need students' attention The key part of the course is about HCIA and hcip security. Although this three-stage course is not the latest course this year, it is still the content released for the first time. It has great reference value and is very important for practical combat and experiment. Reference value.)
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