You need to ensure that client computers can resolve single-label names to IP addresses

Your network contains multiple subnets.
On one of the subnets, you deploy a server named Server1 that runs Windows Server 2012 R2.
You install the DNS Server server role on Server1, and then you create a standard primary zone
named contoso.com.
You need to ensure that client computers can resolve single-label names to IP addresses.
What should you do first?

A.
Create a reverse lookup zone.

B.
Convert the contoso.com zone to an Active Directory-integrated zone.

C.
Configure dynamic updates for contoso.com.

D.
Create a GlobalNames zone.

Explanation:
Although a GlobalNames zone is required in order to resolve single-label names, GNZs must be ADintegrated.
Since this is a standard primary zone (as opposed to an ADDS primary zone), we must first integrate
the zone into Active Directory.
References:
Exam Ref: 70-410: Installing and Configuring Windows Server 2012 R2, Chapter4: Deploying and
configuring core network services, Objective 4.3: Deploy and Configure the DNS service, p.233
http://technet.microsoft.com/en-us/library/cc731744.aspx

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karl

Exam Ref: 70-410: Installing and Configuring Windows Server 2012 R2, Chapter4: Deploying and
configuring core network services, Objective 4.3: Deploy and Configure the DNS service, p.233and so on don’t speak about GNZs (you don’t find GlobalNames word in the whole book)

” The GNZ feature is designed to enable DNS resolution of these single-label, static, global names. You can deploy a GNZ in a single forest or across multiple forests. ..
…GNZ is not intended to support the single-label name resolution of records that are registered dynamically and therefore not managed by IT administrators. GNZ does make it possible for you to provide single-label name resolution of a fixed set of host computers whose names are guaranteed to be both global and unique….
..We also recommend that the GlobalNames zone be integrated with Active Directory Domain Services (AD DS). This integration with AD DS ensures easier management and future scalability….

…The first step in deploying a GlobalNames zone is to create the zone on a DNS server that is a domain controller running Windows Server 2008. The GlobalNames zone is not a special zone type; rather, it is simply an AD DS-integrated forward lookup zone that is called GlobalNames
https://technet.microsoft.com/en-us/library/cc731744.aspx

Confused..: We raccomend that GNZs be integrated for easier management and: …GNZs it simply an AD DS-integrated FLZ…
Can or must?

“Create DNS Global Names Zone…
..4. In the new zone type, select the type of zone to created, here select primary
and also select “store zone in active directory” if one wants to create global names zone in the active directory.”
http://dns-info.blogspot.it/2009/01/create-dns-global-names-zone.html

ok, can not must

answer D