Skip to Main 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 content levelIntermediate to advanced
416 pages
13h 50m
English
O'Reilly Media, Inc.
Content preview from DNS on Windows Server 2003, 3rd Edition

Domains

A domain is simply a subtree of the domain namespace. The domain name of a domain is the same as the domain name of the node at the very top of the domain. So, for example, the top of the purdue.edu domain is a node named purdue.edu, as shown in Figure 2-3.

The purdue.edu domain
Figure 2-3. The purdue.edu domain

Likewise, in a filesystem, at the top of the \Program Files directory you’d expect to find a node called \Program Files, as shown in Figure 2-4.

The \Program Files directory
Figure 2-4. The \Program Files directory

Any domain name in the subtree is considered a part of the domain. Because a domain name can be in many subtrees, a domain name can also be in many domains. For example, the domain name pa.ca.us is part of the ca.us domain and also part of the us domain, as shown in Figure 2-5.

A node in multiple domains
Figure 2-5. A node in multiple domains

So in the abstract, a domain is just a subtree of the domain namespace. But if a domain is simply made up of domain names and other domains, where are all the hosts? Domains are groups of hosts, right?

The hosts are there, represented by domain names. Remember, domain names are just indexes into the DNS database. The “hosts” are the domain names that point to information about individual hosts, and ...

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.
Start your free trial

You might also like

Windows Server 70-741: Networking with Windows Server 2016

Windows Server 70-741: Networking with Windows Server 2016

Andrew Warren
Mastering VMware vSphere 6.7 - Second Edition

Mastering VMware vSphere 6.7 - Second Edition

Martin Gavanda, Andrea Mauro, Paolo Valsecchi, Karel Novak
Exam Ref MD-100: Windows 10, First Edition

Exam Ref MD-100: Windows 10, First Edition

Andrew Bettany, Andrew Warren

Publisher Resources

ISBN: 0596005628Supplemental ContentErrata Page