top button
Flag Notify
    Connect to us
      Site Registration

Site Registration

What is DNS? Which protocol does it use?

+2 votes
566 views
What is DNS? Which protocol does it use?
posted Jul 23, 2013 by Sid Vish

Share this question
Facebook Share Button Twitter Share Button LinkedIn Share Button

1 Answer

+1 vote

DNS is a hierarchical distributed naming system for computers, services, or any resource 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 easily memorized domain names to the numerical IP addresses needed for the purpose of locating computer services and devices worldwide. By providing a worldwide, distributed keyword-based redirection service, the Domain Name System is an essential component of the functionality of the Internet.

An oft-used analogy to explain the Domain Name System is that it serves as the phone book for the Internet by translating human-friendly computer hostnames into IP addresses. For example, the domain name www.example.com translates to the addresses 192.0.43.10 (IPv4) and 2001:500:88:200::10 (IPv6). Unlike a phone book, the DNS can be quickly updated, allowing a service's location on the network to change without affecting the end users, who continue to use the same host name. Users take advantage of this when they use meaningful Uniform Resource Locators (URLs) and e-mail addresses without having to know how the computer actually locates the services.

The Domain Name System distributes the responsibility of assigning domain names and mapping those names to IP addresses by designating authoritative name servers for each domain. Authoritative name servers are assigned to be responsible for their supported domains, and may delegate authority over subdomains to other name servers. This mechanism provides distributed and fault tolerant service and was designed to avoid the need for a single central database.

The Domain Name System also specifies the technical functionality of this database service. It defines the DNS protocol, a detailed specification of the data structures and data communication exchanges used in DNS, as part of the Internet Protocol Suite.

Source: http://en.wikipedia.org/wiki/Domain_Name_System

answer Jul 23, 2013 by Sumit Pokharna
Similar Questions
+1 vote

I am running a web server not at standard port 80 then in this case how it can accessed by outsider/visitor without knowing the port number ?

0 votes

I want to understand trade-off between using local v/s google DNS.

+4 votes

Please help as I need to move QueryHome DNS service so want to know this in detail?

...