RFC 2782:A DNS RR for specifying the location of s...
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alias


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... target host. There MUST be one or more address records for this name, the name MUST NOT be an alias (in the sense of RFC 1034std13 or RFC 2181prop ...


... Hamilton, M. and R. Wright, "Use of DNS Aliases for Network Services", BCP 17, RFC 2219 ...



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