This isn??™t a hard and fast requirement, but it is
recommended because it might cause some problems if your DNS client receives an IPv6 address
response from your DNS server.
GlobalNames Zone
If you are still operating WINS, you will be very interested in the GlobalNames Zone
feature. Many organizations to this day still use WINS in addition to DNS to provide
name resolution. WINS provides a single name to IP address mapping. In some cases,
legacy applications drive the need for WINS in the environment. WINS is based on Net-
BIOS over TCP/IP, which isn??™t a bad protocol, but it is nonetheless obsolete. Windows
Server 2008 DNS allows you to create a new type of zone called the GlobalNames Zone.
The replication scope of this zone is forest level to ensure that the names are unique
across the entire forest. This can help facilitate many organizations??™ goals to move to a
strictly DNS-driven environment.
Read-Only DNS Zone
In Chapter 4 you read about the new Active Directory features in Windows Server 2008,
including a new role called a read-only domain controller (RODC). To complement this
feature, Windows Server 2008 DNS now supports a new zone called a primary read-only
zone. This zone provides a read-only copy of the DNS zone information to requesting
RODCs. RODCs replicate the DNS application partition and store this as a read-only
zone. Administrators can view any entry in the read-only copy just as they could a regular
DNS server, but if changes are to be made, they must be done on a server that is not
set to read-only mode.
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