Which of the following default ports must be opened to allow a technician to telnet into a machine?（）
- A、21
- B、23
- C、24
- D、25
正确答案:B
答案解析:有
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CompTIA认证考试
CompTIA认证考试
Which of the following default ports must be opened to allow a technician to telnet into a machine?（）
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