GCIA: GIAC Certified Intrusion AnalystDemo

By GIAC · Question Mode

QuestionQ373

Application Protocols

Which of the following ports do email clients use to send a connection request to the server?

  • A Port 23
  • B Port 21
  • C Port 25
  • D Port 20
Explanation

SMTP is the protocol used to send email, and its conventional server port is TCP port 25. FTP uses ports 20 and 21, while Telnet uses port 23.

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