Users are unable to access the Internet but the users are able to send/receive email from theirdesktops. Which of the following ports is MOST likely being blocked?（）
- A、25
- B、80
- C、110
- D、143
正确答案:B
答案解析:有
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CompTIA认证考试
CompTIA认证考试
Users are unable to access the Internet but the users are able to send/receive email from theirdesktops. Which of the following ports is MOST likely being blocked?（）
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