Which option within the ISC DHCPD configuration file defines the IPv4 DNS server address(es) to be sent to the DHCP clients?

Which of the following lines is valid in a configuration file in /etc/pam.d/?

How is the LDAP administrator account configured when the rootdnand rootpwdirectives are not present in the slapd.conffile?

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.)

CORRECT TEXT
Which directive in a Nginx server configuration block defines the TCP ports on which the virtual host will be available, and which protocols it will use? (Specify ONLY the option name without any values.)