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We have 3 physical (and logical) sites. Each site is on a different subnet connected via routers. we have a DNS server at each site. We have 1 Domain. When configuring a new DNS server at a new Site we need to know if we should choose &quot;Primary Zone&quot; or &quot;Secondary Zone&quot; at the new Site. 
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We have 3 physical (and logical) sites. Each site is on a different subnet connected via routers. we have a DNS server at each site. We have 1 Domain. When configuring a new DNS server at a new Site we need to know if we should choose "Primary Zone" or "Secondary Zone" at the new Site. 

Create another subnet under Reverse Lookup Zones

The Domain Name System (DNS) is a hierarchical, globally distributed system responsible for associating the name of a computer, service or other resource into an IP address for connecting to the Internet or a private network. Most prominently, it translates domain names to the numerical IP addresses needed for the purpose of computer services and devices worldwide.

Windows Server 2003 was based on Windows XP and was released in four editions: Web, Standard, Enterprise and Datacenter. It also had derivative versions for clusters, storage and Microsoft’s Small Business Server. Important upgrades included integrating Internet Information Services (IIS), improvements to Active Directory (AD) and Group Policy (GP), and the migration to Automated System Recovery (ASR).

Windows Server 2003

The Windows operating systems have distinct methodologies for designing and implementing networks, and have specific systems to accomplish various networking processes, such as Exchange for email, Sharepoint for shared files and programs, and IIS for delivery of web pages. Microsoft also produces server technologies for networked database use, security and virtualization.