Which of the following ports should be allowed through a firewall to allow DNS resolution to occur
to an outside DNS server?
A.
20
B.
53
C.
80
D.
3389
Which of the following ports should be allowed through a firewall to allow DNS resolution to occur to an outside DNS server?
Which of the following ports should be allowed through a firewall to allow DNS resolution to occur
to an outside DNS server?
20 – FTP
80 – HTTP
3389 – RDP
So that leaves 53 for DNS