An enterprise is trying to limit outbound DNS traffic originating from its internal network. Outbound DNS requests will only be allowed from one device with the IP address 10.50.10.25. Which of the…

The correct answer is D. Access list outbound permit 10.50.10.25 32 0.0.0.0/0 port 53. The correct answer is D because it allows only the device with the IP address 10.50.10.25 to send outbound DNS requests on port 53, and denies all other devices from doing so. The other options are incorrect because they either allow all devices to send outbound DNS requests (A…

Submitted by yaw92· Mar 6, 2026Security architecture

Question

An enterprise is trying to limit outbound DNS traffic originating from its internal network. Outbound DNS requests will only be allowed from one device with the IP address 10.50.10.25. Which of the following firewall ACLs will accomplish this goal?

Options

AAccess list outbound permit 0.0.0.0 0 0.0.0.0/0 port 53
BAccess list outbound permit 0.0.0.0/0 10.50.10.25 32 port 53
CAccess list outbound permit 0.0.0.0 0 0.0.0.0/0 port 53
DAccess list outbound permit 10.50.10.25 32 0.0.0.0/0 port 53

How the community answered

(30 responses)

A
3% (1)
B
3% (1)
C
10% (3)
D
83% (25)

Explanation

The correct answer is D because it allows only the device with the IP address 10.50.10.25 to send outbound DNS requests on port 53, and denies all other devices from doing so. The other options are incorrect because they either allow all devices to send outbound DNS requests (A and C), or they allow no devices to send outbound DNS requests (B).

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