NetworkingCâu 38 / 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
Giải thích
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.
Luyện miễn phí toàn bộ 100 câu hỏi — không cần đăng ký.
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Đội Ngũ Biên Tập PrepPass · Đối chiếu với CompTIA A+ Core 1 (220-1101) · Quy trình kiểm tra