On 30 nov 2008, at 17:30, Keith Moore wrote:
DNS names as
currently used with A, AAAA, MX, and SRV records don't have the right
semantics. Part of the reason is that we don't distinguish between
DNS
names that are used to name services (which may be implemented on
multiple hosts, each of which has one or more A/AAAA records) and DNS
names that are used to name single hosts (which may have multiple A/
AAAA
records for other reasons). And the same DNS name may be used
sometimes
as a host name (via A or AAAA records, say when using ssh) and
sometimes
as a service name (via MX or SRV records).
Who cares?
Identification is a different problem from classification.
The same ambiguity exists with IP addresses, anyway. Or did you really
think 74.125.77.99 is a single machine?
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