A company needs to address an issue with its external DNS servers that allows an attacker to perform a full zone transfer if the IP address of a server within the BIND server's ACL configuration is spoofed. A portion of the /etc/named.conf for a BIND server is as follows: */etc/named.conf # External DNS BIND Configuration, Company LLC acl slave-servers { 10.0.0.12; //na1.compa.ny 10.0.0.13; //ns2.compa.ny zone compa.ny { type master; ile "zonefilea/compa.ny"; allow-transfer slave-servers; In which of the following ways should the BIND server implementation be modified to BEST mitigate this insecurity? OA. Change the ACL settings from IP to hostnames. OB. Establish a persistent TLS VPN between the master and slave servers. OC. Place sensors to collect the DNS transaction logs and send them to the Enterprise SIEM OD. Implement transaction signatures.

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