Skip to Content
DNS on Windows Server 2003, 3rd Edition
book

DNS on Windows Server 2003, 3rd Edition

by Cricket Liu, Matt Larson, Robbie Allen
December 2003
Intermediate to advanced
416 pages
13h 50m
English
O'Reilly Media, Inc.
Content preview from DNS on Windows Server 2003, 3rd Edition

IPv6 Forward and Reverse Mapping

Clearly, the existing A record won’t accommodate IPv6’s 128-bit addresses. RFC 1886 defines the solution: an address record that’s four times as long as an A record. That’s the AAAA (pronounced "quad A”) record. The AAAA record takes as its record-specific data the textual format of an IPv6 record as described earlier. So for example, you’d see AAAA records like this one:

ipv6-host    IN    AAAA    4321:0:1:2:3:4:567:89ab

RFC 3152 established ip6.arpa , a new reverse-mapping namespace for IPv6 addresses.[6] Each level of subdomain under ip6.arpa represents four bits of the 128-bit address, encoded as a hexadecimal digit just like in the record-specific data of the AAAA record. The least significant (lowest order) bits appear at the far left of the domain name. Unlike the format of addresses in AAAA records, omitting leading zeros is not allowed, so there are always 32 hexadecimal digits and 32 levels of subdomain below ip6.arpa in a domain name corresponding to a full IPv6 address. The domain name that corresponds to the address in the previous example is:

b.a.9.8.7.6.5.0.4.0.0.0.3.0.0.0.2.0.0.0.1.0.0.0.0.0.0.0.1.2.3.4.ip6.arpa.

These domain names have PTR records attached, just as the domain names under in-addr.arpa do:

b.a.9.8.7.6.5.0.4.0.0.0.3.0.0.0.2.0.0.0.1.0.0.0.0.0.0.0.1.2.3.4.ip6.arpa.  IN  PTR  
mash.ip6.movie.edu.

[6] Several aspects of IPv6 addressing have been a moving target within the Internet standards community. We should point out that ...

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.

Read now

Unlock full access

More than 5,000 organizations count on O’Reilly

AirBnbBlueOriginElectronic ArtsHomeDepotNasdaqRakutenTata Consultancy Services

QuotationMarkO’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.
Julian F.
Head of Cybersecurity
QuotationMarkI wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.
Addison B.
Field Engineer
QuotationMarkI’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.
Amir M.
Data Platform Tech Lead
QuotationMarkI'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
Mark W.
Embedded Software Engineer

You might also like

Windows Server 2016: Unleashed

Windows Server 2016: Unleashed

Rand Morimoto, Jeffrey Shapiro, Guy Yardeni, Omar Droubi, Michael Noel, Andrew Abbate, Chris Amaris
Mastering VMware vSphere 6.7 - Second Edition

Mastering VMware vSphere 6.7 - Second Edition

Martin Gavanda, Andrea Mauro, Paolo Valsecchi, Karel Novak
Pro DNS and BIND 10

Pro DNS and BIND 10

Ron Aitchison
Exam Ref MD-100: Windows 10, First Edition

Exam Ref MD-100: Windows 10, First Edition

Andrew Bettany, Andrew Warren

Publisher Resources

ISBN: 0596005628Errata Page