The Domain Name System DNS is a hierarchical and decentralized naming system for computers, services, or other resources connected to the Internet or a private network. It associates various information with domain names assigned to each of the participating entities. Most prominently, it translates more readily memorized domain names to the numerical IP addresses needed for locating and identifying computer services and devices with the underlying network protocols. By providing a worldwide, distributed directory service , the Domain Name System has been an essential component of the functionality of the Internet since The Domain Name System delegates the responsibility of assigning domain names and mapping those names to Internet resources by designating authoritative name servers for each domain. Network administrators may delegate authority over sub-domains of their allocated name space to other name servers. This mechanism provides distributed and fault-tolerant service and was designed to avoid a single large central database. The Domain Name System also specifies the technical functionality of the database service that is at its core.
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A domain name is an identification string that defines a realm of administrative autonomy, authority or control within the Internet. Domain names are used in various networking contexts and for application-specific naming and addressing purposes. In general, a domain name identifies a network domain , or it represents an Internet Protocol IP resource, such as a personal computer used to access the Internet, a server computer hosting a website , or the web site itself or any other service communicated via the Internet.
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Any information that you use to support ideas and arguments in a research paper should be given some scrutiny. Printed materials that are collected in a library go through an evaluative process as librarians select them to include in their collections. There is also an evaluation of Web sites that are included in search directories, such as Yahoo! However, sites harvested by "spiders" or "robots" for search engines don't go through any evaluative process. There are no real restrictions or editorial processes for publishing information on the Web, beyond some basic knowledge of Web page creation and access to a hosting computer. Anyone can publish opinion, satire, a hoax, or plainly false information. To insure that the Web sites you use as information sources are acceptable for research purposes, you should ask questions about those sites. The following are some elements you should look at before deciding to use a Web site as a research resource:.
Going over these concepts now, before starting to learn about DNS, will. For example, DNS translates and maps the domain freecodecamp. TXT that contained all name-to-address mapping for every host on the network.