A company's firewall has been configured with various rules to allow specific types of traffic into the network. After all the access control rules have been set, what is the BEST practice to ensure that any unspecified traffic is blocked by default?
Configure an 'implicit deny' rule at the end of the ACL
Remove all 'deny' rules to streamline firewall processing
Configure an 'allow by default' rule at the end of the ACL
Configure the firewall to 'ignore unspecified traffic'