Information Technology Reference
In-Depth Information
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Background zone loading
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Support for TCP/IP version 6 (IPv6)
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Read-only domain controllers
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GlobalName zone
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DNS Socket Pool
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DNS Cache Locking
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DNS Security Extensions (DNSSEC)
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DNS Devolution
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Zone Level Statistics
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Record Weighting
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Netmask Ordering
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DnsUpdateProxy Group
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Windows PowerShell Support
Background Zone Loading
If an organization had to restart a DNS server with an extremely large Active Directory
Integrated DNS zones database in the past, DNS had a common problem with an Active
Directory Integrated DNS zone. After the DNS restart, it could take hours for DNS data to
be retrieved from Active Directory. During this time, the DNS server was unable to service
any client requests.
Microsoft Windows Server 2008 DNS addressed this problem by implementing
background zone loading, and Windows Server 2012 R2 has taken it a step further. As the
DNS restarts, the Active Directory zone data populates the database in the background.
This allows the DNS server to service client requests for data from other zones almost
immediately after a restart.
Background zone loading accomplishes this task by loading the DNS zone using separate
threads. This allows a DNS server to service requests while still loading the rest of the zone.
If a client sends a request to the DNS server for a computer that has not yet loaded into
memory, the DNS server retrieves the data from Active Directory and updates the record.
Support for IPv6 Addresses
Over the past few years, the Internet has starting running into a problem that was not
foreseen when it was first created—it started running out of TCP/IP addresses. As you
probably know, when the Internet was created, it was used for government and academic
purposes only. Then, seemingly overnight, it grew to be the information superhighway.
Nowadays, asking someone for his or her email address is almost as common as asking for
their phone number.
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