Page 212 - Webapplication11_C11_Flipbook
P. 212
Ð ÐThe last step in the DNS process.
The information is stored on the recursive DNS server, which returns the record to your computer. The record is then
saved in our computer's local cache. It obtains our IP address from the DNS record and sends it to our browser. The
website will be now be displayed on our web browser.
The full lookup operation takes milliseconds to complete from start to finish. Let's break down the components that
make up the lookup process for a better understanding.
IP address is in my DNS local cache.
IP address is not in my DNS local cache.
Type www.cbse.nic.in
Recursive DNS Server
IP address is not in my DNS local cache
IP address is in my DNS local cache Recursive name server will store the record
information its DNS local cache obtained from the
Authoritative DNS server
IP address is located in my DNS
Authoritative DNS Server
Domain Registration Process
A name is mapped to a static IP address using the Domain Name System (DNS). These are used by computers to
communicate with one another using a unique name. When a computer requests a URL, the DNS converts the name
into an IP address. When you register for a website, one of the first things you'll have to do is choose a domain name.
Then you go to a domain registrar and register your domain name.
Domain registrars register your domain name and connect you to the Internet by ensuring that it is added to a massive
database of domain names mapped to specific IP addresses.
The following is the sequence in which the process takes place:
Ð ÐYou go to a registrar who is accredited.
Ð ÐYou go to the registrar’s website to see if the domain name you want is available. For example, if you wanted to
build a website with the domain name ebay.com, you’d discover that someone else has already done it. Most
registrar services have an easy-to-use search interface that lets you see if the domain you desire is already taken
and suggests alternatives.
Ð ÐOnce you've decided on a name, you must submit it to ICANN(Internet Corporation for Assigned Names and
Numbers) using the registrar's website.
Ð ÐThe registrar normally "parks" your site by granting you an IP address for a tiny tree on one of their servers. You can
alternatively supply an IP address, which you should have received from your hosting company when you signed up.
Ð ÐHave your payment gateway ready because you'll be required to pay for the registrar's services next.
Ð ÐThe registrar then maps the domain name to either the IP address you gave or the IP address it used to park your
domain name on its server. The mapping is then sent to ICANN, where it is stored in a huge database that contains
all of the world's IP addresses and domain names.
210 Touchpad Web Applications-XI

