Which of the following protocols uses both TCP and UDP ports?

Which of the following protocols uses both TCP and UDP ports?

Which of the following protocols uses both TCP and UDP ports?

A.
Telnet

B.
FTP

C.
DNS

D.
SMTP

Explanation:

FTP : TCP Port 20 or 21
SMTP : TCP Port 25
Telnet : TCP Port 23
DNS : both TCP and UDP Port 53



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