Hi, i signed up recently and i'm quite confused about multiple DNS RR's for forward and reverse lookups. According to my knowledge there are following types for forward lookups: - AAAA - A6 - CNAME (as with ipv4) According to my knowledge AAAA assigns a single address to a given hostname (the same way as A records) while A6 records can specify part's of ip-addresses which are chained together. Is it right that the 6bone uses only AAAA records without exception? The BIND 9 Administrator Reference Manual (Version 9.2) says: "The AAAA record is a parallel to the IPv4 A record. It specifies the entire address in a single record. [...] While their use is deprecated, they are useful to support older IPv6 applications. They should not be added where they are not absolutely necessary." Are A6 records not used because of their complexity or lower efficiency? Can someone tell me if either the AAAA or A6 record type is deprecated or which ones are ought to be used in future? I would also be pleased if someone can tell me, how this applies to the ip6.int (nibble format) and ip6.arpa (bitstring format) methods for reverse lookups as the bind reference manual also says the nibble format was deprecated.