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

Incremental Zone Transfer

The Microsoft DNS Server in Windows 2003 supports a new kind of zone transfer. Incremental zone transfer, or IXFR for short, is specified in RFC 1995, and it does exactly what you’d expect based on its name. A traditional zone transfer always transfers the entire contents of a zone, even if only one record has changed. Incremental zone transfers allow a name server to send a list of just the records that have changed since the last zone transfer (whether it was a full or incremental one).

This new feature is critical for zones that change frequently. Imagine the scenario with dynamic update: every dynamic update is a change to the zone that requires a zone transfer. Doing a full zone transfer with every small change wastes bandwidth and CPU time. The situation is compounded when the zone being updated and transferred is large.

For IXFR to function, the master servers need to keep track of the differences between successive versions of the zone. A secondary requests an incremental zone transfer and presents its current serial number. The master server calculates and sends the changes needed on the secondary to make its version of the zone current. If the master server can’t calculate the changes for whatever reason—perhaps the secondary has an old version of the zone and the primary hasn’t kept a record of changes that far back—the primary is allowed to say “Sorry, but you’ve got to accept a full zone transfer.”

A Microsoft DNS Server acting as a secondary ...

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