extend cname and other data answer

diff --git a/FAQ.xml b/FAQ.xml
index b2d4842b078e4abad68deb3f7d584b293c5010dc..5ef8e8d2403f8a06980f947d5e5b52988b519d05 100644 (file)
--- a/FAQ.xml
+++ b/FAQ.xml
@@ -17,7 +17,7 @@
  - PERFORMANCE OF THIS SOFTWARE.
 -->
 
-<!-- $Id: FAQ.xml,v 1.4.4.2 2005/09/06 02:58:32 marka Exp $ -->
+<!-- $Id: FAQ.xml,v 1.4.4.3 2005/11/02 22:53:33 marka Exp $ -->
 
 <article class="faq">
   <title>Frequently Asked Questions about BIND 9</title>
@@ -602,6 +602,17 @@ rand_irqs="3 14 15"</programlisting>
 dig axfr example.com @master-server &gt; tmp
 named-checkzone example.com tmp</programlisting>
        </informalexample>
+       <para>
+         A CNAME record cannot exist with the same name as another record
+         except for the DNSSEC records which prove its existance (NSEC).
+       </para>
+       <para>
+         RFC 1034, Section 3.6.2: <quote>If a CNAME RR is present at a node,
+         no other data should be present; this ensures that the data for a
+         canonical name and its aliases cannot be different.  This rule also
+         insures that a cached CNAME can be used without checking with an
+         authoritative server for other RR types.</quote>
+       </para>
       </answer>
     </qandaentry>