Friday, June 29, 2012

DNS,How does it work ?

- What's  DNS ?

DNS is a protocol that allows you to associate a domain name example : www.axelaris-hosting.com ,to an IP address. However, to avoid the kind of numerical addresses 196.183.159.29, difficult to remember, especially when it comes to remember websites we've saw during the day. Users prefer a domain name that is friendly and easy to spell.

-What is a parked domain ?

A parked domain is a domain that is attached to a main account hosting having its own primary domain. There is a significant difference between these two types of domains.

A parked domain, can redirect one or more domain names to the same site. For example, you could add the parked domains:  axelaris-hosting.net, axelaris-hosting.biz, axelaris-hosting.org, to your main account axelaris-hosting.com to point to all these areas to the same address.

It's often used by businesses that want to have more than one web address for advertising purposes.

Domain names must be registered with a valid registrar before they can be parked. In addition, they will do nothing unless they are configured to point to the DNS servers of the same name as your primary domain.

How does DNS work ?

When a user types a domain name  (www.axelaris-hosting.com) in his browser, in the first the computer contacts a local DNS server requesting the IP address of www.axelaris-hosting.com. If the local server cannot find the requested IP address: : The DNS server in turn  may contact other DNS servers on the Internet, which it will return the IP address of the server name requested.

- What to do in case of change of host?

If you have a domain name and you desire changing your web provider, and transferring the domain name, it will change the "DNS" so that queries for the domain name that you have link to the corresponding name server. This change will be reflected later on domain name servers, within a period not exceeding 48 hours before all DNS servers around the world have considered the change. 

- The most popular extensions:

These extensions are the most used :

. com: the best known, it means the company business.

 . org: refer to associations

 . net refers to the networks and companies working in a network activity

 . info: refers to information sites

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