On Mon, Jul 25, 2011 at 11:12:46AM +1000, Mark Andrews wrote:
But, do current webbrosers resolve names using anything but DNS A?
(well, I know that they use /etc/hosts). Anyhow, WINS / NIS /etc/hosts
and such stuff just maps a hostname into a single IP. It's the
equivalent of a DNS A resource record. Think about locating a mail
server (MX is required), you need a DNS server.
... or a static entry (the "Smart Relay host" entry you see in on the DS
line in sendmail.cf). That's the case of any mail client in a campus, they
don't use DNS to send outgoing mail. And even within the mail relays and
servers, it's quite common to have a relaydomains file to map domains to
servers.
Willy
But the Smart Relay host uses MX records. The Smart Relay host should
be seen as the same as a HTTP proxy.
Exactly, which means that the browser can't be required to rely on any
information from the DNS since it does not necessarily have access to it
and other components which are not under our control might behave in a
different manner than what we'd like.
Regards,
Willy
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