A network administrator wants to block both DNS requests and zone transfers coming from outside IP addresses. The company uses a firewall which implements an implicit allow and is currently configured with the following ACL applied to its external interfacE. PERMIT TCP ANY ANY 80 PERMIT TCP ANY ANY 443 Which of the following rules would accomplish this task?
A. Change the firewall default settings so that it implements an implicit deny
B. Apply the current ACL to all interfaces of the firewall
C. Remove the current ACL
D. Add the following ACL at the top of the current ACL DENY TCP ANY ANY 53
E. Add the following ACL at the bottom of the current ACL DENY ICMP ANY ANY 53
F. Add the following ACL at the bottom of the current ACL DENY IP ANY ANY 53
Ans:
A. Change the firewall dafault settings so that it implements an implicit deny.
F. Add the following ACL at the bottom of the current ACL DENY IP ANY ANY 53
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