The word missing from the excerpt of a named.conf file is “acl”. This is because the excerpt is defining an access control list (ACL) for the DNS server. The ACL is used to restrict access to the DNS server and is defined in the named.conf file. The syntax for defining an ACL is:
acl name { address_match_list; };
where name is the name of the ACL, and address_match_list is a list of IP addresses, networks, or keywords that match the clients that are allowed or denied access.References:
LPIC-2 Overview
LPIC-2 202-450
BIND 9 Administrator Reference Manual
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