I-D ACTION:draft-ietf-dnsind-ncache-02.txt

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 A Revised Internet-Draft is available from the on-line Internet-Drafts 
 directories. This draft is a work item of the DNS IXFR, Notification, and 
 Dynamic Update Working Group of the IETF.                                 

       Title     : Negative Caching of DNS Queries (DNS NCACHE)            
       Author(s) : M. Andrews
       Filename  : draft-ietf-dnsind-ncache-02.txt
       Pages     : 8
       Date      : 02/21/1997

When [RFC1034] was written there were no DNS servers that implemented 
negative caching [RFC1034 Section 4.3.4]. This document replaces [RFC1034 
Section 4.3.4] in the light of experience.      
                           
Negative caching was a optional part of the DNS specification and deals 
with the caching of the non-existence of a RRset or domain name.  
         
Negative caching is useful as it reduces the response time for negative 
answers. It also reduces the number of messages that have to be sent 
between servers hence overall network traffic. A large proportion of DNS 
traffic on the Internet could be eliminated if all servers implemented 
negative caching. With this in mind negative caching should no longer be 
seen as a optional part of a DNS server.                                   

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