Concept, Structure Database and DNS Hierarchy

DNS is a distributed database form, where the management locally to the data will be immediately forwarded to the entire network (the Internet) using a client-server scheme. A program called a name server, containing all segments of the information from the database and also the resolver for the clients dealing or use.
The structure of the DNS database can be likened to the file structure of a UNIX operating system. The entire database is described as an inverted structure of a tree (tree) which at its peak is called the root node. At each node in the tree has a description (label) eg, .org, .com, .edu, .net, Id and others, relatively rerhadap peak (parent) .This can be compared with the relative pathname in the UNIX file system , such as the bin directory, usr, var, etc and so forth. At the height of the root node in a DNS system denoted by "." Or "/" in the UNIX file system.
At each node is also the root of the subtree, or on the UNIX file system is the root directory of a directory. This system is called the DNS domain name. In each domain also allows the name of the subtree and can be different, it is called a subdomain or subdirectory in the UNIX file system. On the subdomainjuga allow subtree else can be managed by different organizations with the main domain.
DNS Domain Name Space structure is a hierarchy of domain grouping by name. Domain is determined based on the capabilities that exist in a hierarchical structure calledlevel consisting of:

   1. Root-Level Domains: the top level in the hierarchy that is expressed by a period and is denoted by ".".
   2. Top-Level Domains: second-level domains contains danhostsyaitu.
        a. com: commercial organizations, such as IBM (ibm.com).
        b. edu: educational institutions, such as U.C. Berkeley (berkeley.edu).
        c. org: Non-profit organization, the Electronic Frontier Foundation (eff.org).
        d. net: networking organization, NSFNET (nsf.net).
  3. Second-Level Domains: contains other domains called subdomains.
  4. Third-Level Domains: contains another domain that is a subdomain of the domain above the second level.
  5. Host Name: domain name is used with the host name will create the fully qualified domain name (FQDN) for each computer.

This was the concept, the DNS database structure and hierarchy that we can share on this occasion, may be useful. I'll see you again at the next information