What option for BIND is required in the global options to disable recursive queries on the DNS server by default?

• A.allow-recursive-query (none; );
• B.allow-recursive-query off;
• C.recursion {disabled; };
• D.recursion {none; };
• E.recursion no;

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Which command is used to administer IPv6 netfilter rules?

• A.iptablesv6
• B.ip6tables
• C.iptables6
• D.iptables
• E.ipv6tables

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It has been discovered that the company mail server is configured as an open relay. Which of the following actions would help prevent the mail server from being used as an open relay while maintaining the possibility to receive company mails? (Choose two.)

• A.Configure Dovecot to support IMAP connectivity
• B.Restrict Postfix to only accept e-mail for domains hosted on this server
• C.Upgrade the mailbox format from mbox to maildir
• D.Restrict Postfix to only relay outbound SMTP from the internal network
• E.Configure netfilter to not permit port 25 traffic on the public network

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When trying to reverse proxy a web server through Nginx, what keyword is missing from the following configuration sample?

• A.remote_proxy
• B.proxy_pass
• C.proxy_reverse
• D.forward_to
• E.reverse_proxy

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Which of the following information has to be submitted to a certification authority in order to request a web server certificate?

• A.The web server's private key.
• B.The IP address of the web server.
• C.The list of ciphers supported by the web server.
• D.The web server's SSL configuration file.
• E.The certificate signing request.

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