MX question
Mark_Andrews at isc.org
Mark_Andrews at isc.org
Mon Apr 8 23:55:13 UTC 2002
> What the advantage to doing this:
> ;; ANSWER SECTION:
> microsoft.com. 6789 IN MX 10 maila.microsoft.com.
> microsoft.com. 6789 IN MX 10 mailb.microsoft.com.
> microsoft.com. 6789 IN MX 10 mailc.microsoft.com.
>
> ;; ADDITIONAL SECTION:
> maila.microsoft.com. 6789 IN A 131.107.3.125
> maila.microsoft.com. 6789 IN A 131.107.3.124
> mailb.microsoft.com. 6789 IN A 131.107.3.122
> mailb.microsoft.com. 6789 IN A 131.107.3.123
> mailc.microsoft.com. 6789 IN A 131.107.3.121
> mailc.microsoft.com. 6789 IN A 131.107.3.126
>
> As opposed to just listing more MX's like:
> ;; ANSWER SECTION:
> microsoft.com. 6789 IN MX 10 maila.microsoft.com.
> microsoft.com. 6789 IN MX 10 mailb.microsoft.com.
> microsoft.com. 6789 IN MX 10 mailc.microsoft.com.
> microsoft.com. 6789 IN MX 10 maild.microsoft.com.
> microsoft.com. 6789 IN MX 10 maile.microsoft.com.
> microsoft.com. 6789 IN MX 10 mailf.microsoft.com.
>
> ;; ADDITIONAL SECTION:
> maila.microsoft.com. 6789 IN A 131.107.3.125
> mailb.microsoft.com. 6789 IN A 131.107.3.124
> mailc.microsoft.com. 6789 IN A 131.107.3.122
> maild.microsoft.com. 6789 IN A 131.107.3.123
> maile.microsoft.com. 6789 IN A 131.107.3.121
> mailf.microsoft.com. 6789 IN A 131.107.3.126
>
> Is the advantage round-robin?
No. Just information transfer efficency. Think about the
response to ANY queries.
Mark
--
Mark Andrews, Internet Software Consortium
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: Mark.Andrews at isc.org
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