A user states that email is not being received. Which of the following protocols should thetechnician check for incoming mail?（）
- A、SMTP
- B、POP3
- C、NNTP
- D、HTTP
正确答案:B
答案解析:有
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CompTIA认证考试
CompTIA认证考试
A user states that email is not being received. Which of the following protocols should thetechnician check for incoming mail?（）
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