The benefits from the use of this kind of structure under the name is a domain name, there will be only one name without being duplicated, regardless of whether the Internet will have a large number of how many sub-domains? Because a foreign address, domain name, or even a sub domain name are the same. But the affiliation is the top-level domain name, but have a different FQDN and treated with a different name. For example, www.name.co.th is treated with different domain names, on the other hand, some aspects www.name.com benefits of domain name structure is: makes it possible to set the machine name is in the category of domain name.Domain name system in Internet.Domain name system in Internet are divided according to a hierarchical structure (Hierarchical) and distributed databases (Distributed) distributed database system allows domain name service in any organization that is part of the domain name system, there is no need to keep a copy of an existing domain name, all. But the system is connecting to the network to retrieve and exchange information as well as share a database automatically. The hierarchical structure of the domain name system comparable to corporate breaks, such as within a company may be divided into sub departments. Each Department may be broken down into parties or may be compared with the geographical area is divided into different countries. Province, district, etc.The Internet s DNA is structured according to a hierarchy tree structure back head figure 1 structure under a single root trees and broken twigs came up as a series. The end section is unable to break the branches off again as the machine name, for example tpt.nectec. or.th refers to a domain nectec.or.th tpt or cc.usu.edu is a cc usu.edu domain.Tree structure and the structure is generally called a domain namespace (domain name space), or the short run that namespace or to specific Internet access. it's called the Internet namespace. If we consider a figure 1 the Internet namespace with 3 big groups. The meaning of each group are described in detail later.
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