对国家安全造成损害属于信息系统的安全保护等级的第（ ）级
- A.二
- B.三
- C.四
- D.五
正确答案及解析
正确答案
解析
第三级，信息系统受到破坏后，会对社会秩序和公共利益造成严重损害，或者对国家安全造成损害。
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