اختبار شهادة كومبتيا إدارة الخوادم Server+ SK0-005

A security analyst completed a port scan of the corporate production-server network. Results of the scan were
then provided to a systems administrator for immediate action. The following table represents the requested
changes:
The systems administrator created local firewall rules to block the ports indicated above. Immediately, the
service desk began receiving calls about the internet being down. The systems administrator then reversed the
changes, and the internet became available again. Which of the following ports on DNSSrv must remain open
when the firewall rules are reapplied?