Am Mittwoch, den 20.08.2008, 23:05 +0200 schrieb Chris Mair:
Per chi non lo sapesse, qualsiasi *nix viene con un nameserver (di
solito *bind*), spesso perfettamente preconfigurato da fare da
semplice caching nameserver.
Basta lanciarlo e si ha un DNS proprio in locale che dipende solo
dalla disponibilita` dei root name servers e nessun altro.
Hmm, un mio amico mi risponde così:
"Good luck getting DNS responses from 'root' servers. From what I know,
not just any Joe can use them as the primary DNS server for a system.
Also, even though you would have a caching local DNS server, every time
you would try to get a new site, there would be a performance hit. See,
most DNS requests never make it to the root servers because ISP's have
their own name servers set up that practically mirror the root servers,
and these ISP name servers are normally able to answer your request much
quicker simply because they are geographically closer to you (yes, the
further away you are from another server, the larger the latency). So in
short, it's best to stick with your ISP's nameservers because you can't
get to the root servers and it would be a performance hit (unless for
some reason you live near one O_O). If everyone connected to root DNS
servers for lookups, the internet would come to a screeching halt."