Domain Name System
The Domain Name System (DNS) is a distributed database, arranged hierarchically, containing records for domain names. The DNS system's main aim is to match a domain name to an IP Address. In order to fulfill this role, the DNS Server contains Resource Records (Records) in a Zone File, which contains the domain name and IP address mappings for computers contained within that Zone. All Resource Records have a Time To Live TTL (TTL), specifying the number of seconds other DNS servers and applications are allowed to cache the Record.
Each computer on the Internet is assigned a unique address, called an IP address. A typical IP address looks like this: 199.123.456.7
It is very difficult to keep in mind the IP addresses of all the websites we visit daily. Words are easier to remember than strings of numbers. This is where domain names come into the picture. When you visit a website, all you need to know is its URL. Computers remember numbers, and DNS helps us convert the URL into an IP address that the computer can understand.
Name & IP Address
The first step in acquiring a host is to register a name. These are regulated and maintained by name registrars, which ensure that there is no repetition. The actual registration can be done directly through the registrar but most likely will be done by a third party like a hosting service. They are easily readable by people, but for computers to understand them, domain names have to be linked to binary IP addresses throug special servers called domain name servers (DNS). This system allows for a them to be transferred to another server should the webmaster decide to use a different platform.
Web hosting is a service that allows organizations and individuals to post a website or web page onto the Internet. A web host, or web hosting service provider, is a business that provides the technologies and services needed for the website or webpage to be viewed in the Internet. Websites are hosted, or stored, on special computers called servers. .
When Internet users want to view your website, all they need to do is type your website address or domain into their browser. Their computer will then connect to your server and your webpages will be delivered to them through the browser.