A technician recently installed a new firewall. Which of the following ports must be open to permit HTTPS traffic?（）A、21B、23C、80D、443
题目
A technician recently installed a new firewall. Which of the following ports must be open to permit HTTPS traffic?（）
- A、21
- B、23
- C、80
- D、443
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参考答案和解析
正确答案:D