using slave on un-published network??

[simmen]

hello all..
(hope u guys r all ok)
i have 3 questins...
1.. what effect it will have on the DNS/primary if the secoundry is on an unpublished network....??

2.. i am a bit confused about a thing...i.e
lets suppose i have multiple zones..(as masters)
lets say 1 is abc.net..and the other is xyz.net
my NS's r configured as nsp.abc.net//(P) and nss.abc.net//(S) in abc.net.
Now in the zone file of xyz.net i configure the NS record as 
nsp.abc.net.&.nss.abc.net..(naturally)...but i dont give the A records for the nsp.abc.net..and nss.abc.net..because of the reason that when the NS record is found of the nsp amd nss in the xzy.net...the DNS will get the A  from the  abc.net ZONE...
am i right..till now..??? (if ! 0  then ..:-))what if put the A records of the nsp and nss next to the NS records in the xyz.net..
will that work...??? or will it still go to the abc.net for the A records...???

3..ok its the last 1..:-)
 // a zone file of abc.net...

  @   IN  NS   ns1.abc.net.
  @   IN  NS   ns2.abc.net.
  @   IN  A    123.123.123.123            

3.1>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
i know that i can  als o define it as 
 @  IN  NS  ns1
            ns2
...can i ???
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
3.2
why am i giving "@  IN A  123.123.123.123" insted of 
ns1   IN  A   123.123.123.123
ns2   IN  A   321.321.321.321      
?????
or in other words when the A record of the NS is deefined
do we have to define it like "@  IN  A  123.123.123.123"
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

thank u all for all of these nsp's ans nss's...i hope that i made u clear what i want to ask...(if ! 1 then.."Shit Missed"...:-)

thakx..

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