A technician must configure a firewall to block external DNS traffic from entering a network. Which of the following ports should they block on the firewall?
A. 53
B. 110
C. 143
D. 443
A technician must configure a firewall to block external DNS traffic from entering a network. Which of the following ports should they block on the firewall?
A. 53
B. 110
C. 143
D. 443
Key words: DNS Traffic. Port 53 utilizes DNS traffic. The other ports in the answer do not utilize DNS traffic.