September 2012
Intermediate to advanced
1680 pages
88h 3m
English
book
Windows Server® 2012 Unleashed
by Rand Morimoto, Michael Noel, Guy Yardeni, Omar Droubi, Andrew Abbate, Chris Amaris
Content preview from Windows Server® 2012 Unleashed
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Explaining the DNS Hierarchy
DNS uses a hierarchical approach to name resolution in which resolution is passed up and down a hierarchy of domain names until a particular computer is located. Each level of the hierarchy is divided by dots (.), which symbolize the division. A fully qualified domain name (FQDN), such as server1.sales.companyabc.com, uniquely identifies a resource’s space in the DNS hierarchy. Figure 10.1 shows how the fictional CompanyABC fits into the DNS hierarchy.
Figure 10.1. DNS hierarchy.
The top of the hierarchy is known as the root, and is represented by a single . (dot). Moving down the DNS hierarchy, the next layer in ...
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