class is not always IN. --bill
On Tue, Jul 28, 2009 at 08:42:03AM +0530, venkatesh.bs wrote: > Thanks olufur, > > Is anywhere in RFC they have mentioned about DNS cache can be based on > FQDN, QUERY TYPE (we are ignoring the class as it is always INTERNET(IN)). > > Thanks & Regards, > venkatesh. > > > > Olafur Gudmundsson wrote: > >At 00:56 27/07/2009, venkatesh.bs wrote: > >>Hi all, > >>I have one query regarding DNS cache maintaince in dns resolver, > >>Whether DNS Cache should be based on per server address or based on > >>FQDN only. > > > >DNS caches MUST cache by the holy DNS Trinity: > >Query Name, Query Type, Query Class > >DNSSEC aware caches the cache should remember the setting of the > >DO bit in the answer. > >There is no need to remember where the answer came from. > > > >If a new query matches what is in the cache then it can be reused. > > > >Olafur > > > >>1. Query1: Domain name: "google.com" DNS IP: DNS_SERVER_1 - result > >>will be stored in DNS Cache > >>Meanwhile,DNS Server IP got changed. > >>2. Query2: Domain name: "google.com" DNS IP: DNS_SERVER_2 - Should we > >>have to query to DNS Server 2? or Should we have to get it from DNS > >>Cache? > >> > >> > >>Thanks in Advance. > >> > >>Best Regards, > >>Venkatesh. > >>_______________________________________________ > >>DNSOP mailing list > >>DNSOP@ietf.org > >>https://www.ietf.org/mailman/listinfo/dnsop > > > > _______________________________________________ > DNSOP mailing list > DNSOP@ietf.org > https://www.ietf.org/mailman/listinfo/dnsop _______________________________________________ DNSOP mailing list DNSOP@ietf.org https://www.ietf.org/mailman/listinfo/dnsop
