[dns-operations] about the ADDITIONAL SECTION

[Feng He]

Hi,

Sorry for my not good english.
Says I have a domain a.com, whose NS records are:
ns1.b.com
ns2.b.com

But b.com is not auth-resolved by my nameserver, for example, its 
auth-servers are registrar's.

a.com is auth-resolved by my own nameservers, the NS records look as:

a.com.             111    IN      NS      ns1.b.com.
a.com.             111    IN      NS      ns2.b.com.

But, if I add the zone b.com into the nameservers' zone file (though the 
zone is not auth-resolved by my servers as I've said), and setup the A 
records with fake IP for ns1.b.com and ns2.b.com. When query for:
dig a.com ns

The nameservers will answer with the additional section whose content is 
the fake IPs.

;; ANSWER SECTION:
a.com.            111     IN      NS      ns1.b.com.
a.com.            111     IN      NS      ns2.b.com.

;; ADDITIONAL SECTION:
ns1.b.com.     111     IN      A       1.2.3.4
ns2.b.com.     111     IN      A       5.6.7.8

Will this make the world's DNS cache not work? i.e, the ISP's public DNS 
servers.

Thanks.