Good practices multiple A RR ?

Mark_Andrews at Mark_Andrews at
Tue Oct 1 00:01:48 UTC 2002

> Hello,
> I just wanted to know if it was a good practice to have multiple
> "A" ressources records for one IP address, for example:
> ns1.domain.tld
> www.domain.tld
> ftp.domain.tld
> Is that alright ? Or should I use CNAMEs instead ? When should I decide
> if a use a "A" RR or a "CNAME" RR for a name ?
> Regards

	Whatever you decide to do.  Note there are some restrictions on
	where CNAMES can be used.  If the host is referred to by another
	record (other than a CNAME) it really should be a A record.
	e.g. NS, MX, SRV records.

Mark Andrews, Internet Software Consortium
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark.Andrews at

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