Ví dụ

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Across
  1. 4. A .......... protects a company intra net from outside attacks
Down
  1. 1. A ............... is a person who uses their computer skills to enter computers and networks illegally.
  2. 2. ................... can infect your files and corrupt your hard drive.
  3. 3. Users have to enter a ......... to gain access to a network