Index: en_US.ISO8859-1/books/handbook/network-servers/chapter.xml
===================================================================
--- en_US.ISO8859-1/books/handbook/network-servers/chapter.xml	(revisione 53525)
+++ en_US.ISO8859-1/books/handbook/network-servers/chapter.xml	(copia di lavoro)
@@ -3329,7 +3329,7 @@
     </sect2>
 
     <sect2>
-      <title><acronym>DNS</acronym> Server Configuration</title>
+      <title>Caching Name Server Configuration</title>
 
       <para><application>Unbound</application> is provided in the &os;
 	base system.  By default, it will provide
@@ -3394,6 +3394,15 @@
                     |---. (DNSKEY keytag: 19036 alg: 8 flags: 257)
 ;; Chase successful</screen>
     </sect2>
+
+    <sect2>
+      <title>Authoritative Name Server Configuration</title>
+
+      <para>&os; does not provide authoritative name server software
+	in base system.  Users are encouraged to install third party
+	applications, from <package>dns/nsd</package> or
+	<package>dns/bind914</package> package or port.</para>
+    </sect2>
   </sect1>
 
   <sect1 xml:id="network-apache">