(usagi-users 03501) dns caching server response....

Hi

I got a doubt regarding DNS caching server response

As per my setup, i have two machines connected 
in LAN...both the machines are Montavista Linux 2.4.20_mvl31-pc_target.
One of them acting as a server & another as client, as well as caching 
server
(used loopback address ::1). Both machines are Ipv6 aware. The caching 
server
is acting as client also. i just configured the /etc/resolv.conf like 
nameserver    ::1

i have setup a self-contained root nameserver,
accordingly i configured the /var/named/named.ca 

.                        3600000      NS        ns.ipv6.domain.
ns.ipv6.domain.          3600000      AAAA      fe80::210:b5ff:fea7:f057

and commented 'cache line' in the /etc/named.conf of server machine(root 
server)
well its working fine...here the result i got 

[root@localhost bind-9.2.4]# dig ipv6.domain AAAA

; <<>> DiG 9.2.1 <<>> ipv6.domain AAAA
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1165
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 1

;; QUESTION SECTION:
;ipv6.domain.                   IN      AAAA

;; ANSWER SECTION:
ipv6.domain.            86391   IN      AAAA    ::1

;; AUTHORITY SECTION:
ipv6.domain.            86391   IN      NS      ns.ipv6.domain.

;; ADDITIONAL SECTION:
ns.ipv6.domain.         86391   IN      AAAA    fe80::210:b5ff:fea7:f057

;; Query time: 4 msec
;; SERVER: ::1#53(::1)
;; WHEN: Mon Sep 26 17:20:59 2005
;; MSG SIZE  rcvd: 102

But what i got as doubt is like whenever the caching server returns
response for the first time should not it send the same along with 'aa' 
bit set,
coz first time it wont have the data in its cache....from 2nd time onwards 
the
'aa' bit should not be set...


Another thing is like where the caching server maintains the cache?
can we check it with any command or by opening any file? I'm really really
very eager to know this........
plz comment....


thanks & regards

Sanjib



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