DNS listens on which well-known ports?

Posted by: Pdfprep Category: 210-250 Tags: , , Post Date: December 22, 2020

DNS listens on which well-known ports?
A . TCP port 53 and UDP port 53
B . UDP port 67 and UDP port 68
C . TCP port 21 and TCP port 22
D . TCP 161 and UDP 161

Answer: A

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