DNS (Domain Name System)
DNS refers to the domain name system. This is a system that
can transfer a domain name, such as www.acme.com, to a number known as an IP
address that computers understand. IP addresses consist of four numbers,
separated by dots.
There is an analogy between the DNS domain name system used
on the Internet with a person looking up a name in the phone book in order to
find out somebody’s telephone number.
IP addresses are very difficult to remember for people. For
example, could you remember the number 126.12.54.178? It is much more easy for humans to remember a plain-text word such as
www.acme.com. Computers, on the other hand, could not do much with that domain
name. They need the IP address in order to rout the traffic over the Internet.
Do the DNS domain name server is used to do a lookup on the domain name to find
out the IP address of the website.
Every domain name needs to be registered in the DNS domain
name server of the ISP that hosts the website. This is normally done by the ISP
for you, so you don’t need to worry about the technical details.
