5、收发电子邮件主要使用的协议是______协议。A.HTTPB.TCP/IPC.FTPD.SMTP和POP3 - 查题网

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高等继续教育 / 计算机统考

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5、收发电子邮件主要使用的协议是______协议。
A.HTTP
B.TCP/IP
C.FTP
D.SMTP和POP3

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计算机统考

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