You are attempting to control the proliferation of malware within your network and have created a list of known bad hostnames that have been popular with malware attempting to connect to command and control servers on the public Internet. Which of the following solutions will provide an efficient control that will deny access to the malware servers?

Create a whitelist file on the DNS server containing the hostnames of all approved domains. Create a whitelist file on the localhost containing the hostnames of all approved domains. Create a blacklist file on the localhost containing the hostnames of all known bad domains. Create a blacklist file on the DNS server containing the hostnames of all known bad domains.