What the author refers to as a "naked domain" is more generally termed the zone apex. A CNAME does not co-exist with other records (save for RRSIGs if the zone is signed). Quoting RFC 1034: If a CNAME RR is present at a…
What the author refers to as a "naked domain" is more generally termed the zone apex. A CNAME does not co-exist with other records (save for RRSIGs if the zone is signed). Quoting RFC 1034: If a CNAME RR is present at a…