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SMTP uses which of the following TCP port?(a) 22(b) 23(c) 21(d) 25I got this question during an online exam.Question is from SMTP topic in chapter Application Layer of Computer Network

Answer»

Correct option is (d) 25

Easiest explanation: Port 21 is used for FTP control connection, port 22 is used by SSH, and port 23 is used by TELNET.



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