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Multi-level wildcard DNS matched by *.domain.com?

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http://serverfault.com – Q1: Does a DNS rule for *.domain.com match multi-level domain names? In other words, if I just set *.domain.com in my DNS records, will it match all of: a.domain.com b.a.domain.com c.b.a.domain.com as many levels deep as needed, with just that one wildcard DNS specifier? We have a use case for multi-level DNS and I would like to confirm that we are doing the right thing in setting one wildcard DNS setting for the root domain. Q2: will this work with round-robin DNS? (HowTos)