Home

DNS

Jan 31

Domain name registry

A domain name registry, also called Network Information Centre (NIC), is part of the Domain Name System (DNS) of the Internet which converts domain names to IP addresses. It is an organisation that manages the registration of Domain names within the top-level domains for which it is responsible, controls the policies of domain name allocation, and technically operates its top-level 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.

IANA also operates the .int registry for intergovernmental organisations, the .arpa zone for protocol administration purposes, and other critical zones such as root-servers.net.

IANA delegates all other domain name authority to other domain name registries such as VeriSign.

Oct 18

Internet

Internet map Visualization of the various routes through a portion of the Internet

In the general sense, an internet (with a lowercase "i", a shortened form of the original inter-network) is a computer network that connects several networks. As a proper noun, the Internet is the publicly available internationally interconnected system of computers (plus the information and services they provide to their users) that uses the TCP/IP suite of packet switching communications protocols. Thus, the largest internet is called simply "the" Internet. The art of connecting networks in this way is called internetworking.

Sep 10

Hostname

Site name

A hostname (occasionally also, a sitename) is the unique name by which a network-attached device (which could consist of a computer, file server, network storage device, fax machine, copier, cable modem, etc.) is known on a network. The hostname is used to identify a particular host in various forms of electronic communication such as the World Wide Web, e-mail or Usenet.

On the Internet, the terms "hostname" and "domain name" are often used interchangeably, but there are subtle technical differences between them.

Aug 25

Domain names

The term domain name has multiple related meanings:

Jun 27

Internationalized domain names and security

Example of Arabic IDN

Jun 18

How DNS works

How DNS works

How DNS works

Jun 13

DNS standards

Jun 12

How DNS works in practice

When an application (such as a web browser) tries to find the IP address of a domain name, it doesn't necessarily follow all of the steps outlined in the Theory section above. We will first look at the concept of caching, and then outline the operation of DNS in "the real world."

Jun 12

DNS resolving

DNS resolving

DNS resolving from program to OS-resolver to ISP-resolver to greater system

Jun 09

How DNS works in theory

Domain names, arranged in a tree Domain names, arranged in a tree, cut into zones, each served by a nameserver.

Jun 09

A DNS recursor

A DNS recursor

A DNS recursor consults three nameservers to resolve the address www.wikipedia.org.

Jun 08

Domain Name Systems

On the Internet, the Domain Name System (DNS) associates various sorts of information with so-called domain names; most importantly, it serves as the "phone book" for the Internet: it translates human-readable computer hostnames, e.g. en.wikipedia.org, into the IP addresses that networking equipment needs for delivering information. It also stores other information such as the list of mail exchange servers that accept email for a given domain. In providing a worldwide keyword-based redirection service, the Domain Name System is an essential component of contemporary Internet use.

 

Theme & Icons by N.Design Studio
Syndicate content