Your question is Troubleshooting DNS, DHCP, and ACLs. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Describe how you would troubleshoot DNS and DHCP issues and verify ACL behavior on a network device using command-line tools, including how you would validate the fix.