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題目:Mail server port number is()
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Mail server port number is()
A.25
B.81
C.403
D.80
正確答案:25
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智慧樹
相關試題
1.The POP3 protocol runs over()and uses port().
2.()is most used for error reporting.
3.In the following options, which does not use UDP?
4.TCP sender perceive congestion through a timeout event or a receiving duplicate ACK-s event.
5.Internet transport-layer protocols include TCP,IP and UDP.
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