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Highest Authorities In The Domain Name System Hierarchy. Note that the comdomain introduced in this figure is one of a number of top-level organizational domains in existence onthe Internet. The DNS tree has a single domain at the top of the structure called the root domain.
Domain names are managed under a hierarchy headed by the Internet Assigned Numbers Authority IANA which manages the top of the DNS tree by administrating the data in the root nameservers. Table 1 Top-Level DNS Domains lists the top-level DNS domains and the types of organizations that use them. Domain names are managed under a hierarchy headed by the Internet Assigned Numbers Authority IANA What is the largest biological organization.
The DNS root zone is the highest level in the DNS hierarchy tree.
The root servers are the ultimate authorities in the domain name system hierarchy. The root nameservers are very important because they are the first step in resolving a domain name. Network Guide to Networks 7E Jill West Cengage learning Chapter 2 a. The hierarchy of domains descends from right to left.