NetworkingQuestion 38 of 100
Which protocol and port combination is used to send email between mail servers?
a.POP3 on 110
b.SMTP on 25
c.IMAP on 143
d.DNS on 53
Explanation
SMTP on TCP port 25 transfers email between servers. POP3 (110) and IMAP (143) are used by clients to retrieve mail, and DNS resolves names.
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