Domain names are the addresses where websites live. They consist of letters (or numbers) and symbols that identify a specific web page.
For example, if you want to visit www.google.com, you type google.com into your browser address bar.
A domain name is the address of a website. If you own a domain name, you can create a website using it. The domain name identifies your website and helps visitors find it.
You can use any word as a domain name, but some domains have more value than others.
For instance, .com is considered very valuable because most people associate this with an online business.
On the other hand, .net is less valuable because it’s not nearly as well known.
There are special top level domains (often referred to as TLDs) which designate certain categories of sites.
Examples include .gov for governmental sites, .co.uk for United Kingdom sites, and .de for German sites.
The term DNS server is used to refer to computer systems that store and forward data between clients and authoritative name servers on the World Wide Web.
This includes all recursive resolvers, including those implemented as part of operating systems and browsers, as well as standalone software packages.
What Are The Different Types Of Domain Names?
There are three different types of domain names: Generic, Country Code Top Level Domains (ccTLD), and Internationalized Domain Name (IDN).
Generic Top Level Domain Names
Generic top level domain names are those that begin with.com, .net, etc. These domain names are owned by companies, organizations, and individuals.
Country Code Top Level Domains
ccTLDs are domain names that start with a country code. Examples include .ca, .uk, .us, etc. These domain names are owned by countries and are used as identifiers for businesses and other entities within that country.
Internationalized Domain Names
IDNs are domain names that use non-ASCII characters such as Chinese or Arabic characters.
These domain names allow people around the world to access websites using their native languages.
How Do Domain Names Work?
Domain names are assigned to specific organizations or individuals who own the rights to certain websites. These owners are responsible for maintaining the accuracy of the records associated with each domain name.
They also maintain the DNS server that contains the data needed to translate URLs into IP addresses.
If you type www.google.com into your web browser, your computer will contact the DNS server located at google.com. That server will then check its cache to see if there is an entry for www.google.com.
If there isn’t, the server will contact another DNS server, which may or may not have an entry for www.Google.com.
If the second server doesn’t have an entry either, it will contact yet another server until it finds one that does.
Once it gets the correct answer from the last server, it sends back the IP address of www.google.com.
Why Do We Need A DNS Server?
The Internet uses TCP/IP protocols to communicate over networks.
When you access a website online, your web browser connects to a DNS server which translates the URL in the address bar into an IP address.
If there is no DNS server available, the web browser will attempt to resolve the URL by sending out a series of requests until one succeeds. This process takes time and resources.
The DNS system works by having all computers connected to the internet use a central database to store information about websites. Each computer has a copy of this database stored locally on the computer.
Whenever a user wants to visit a website, he sends a request to his local copy of the database. The local copy checks whether the requested website exists in its database.
If it does exist, the local copy returns the IP address of the website. Otherwise, the local copy returns the IP address of the website to the requesting computer.
Otherwise, the local copy returns a message saying that the website doesn’t exist.
How Does A DNS Work?
When you try to reach a website using the address bar in your web browser, you are actually making a DNS query. Your web browser makes a DNS query to see what the IP address of the site is.
In order to make the query, your web browser first needs to know where to ask. To do this, it contacts a DNS server. The DNS server holds a cache of information about sites.
So when a user tries to access a website, the DNS server looks up the IP address in its cache and returns it to the user’s web browser.
A DNS server is like a phone book. It stores information about websites in a database. However, instead of storing only telephone numbers, it stores the full information required to locate any website.
Every website has a unique identifier called a Uniform Resource Locator. The DNS server can look up the URL in its database and return the corresponding IP address.
What Are Caching Servers?
Caching servers are used to speed up the lookup process for users.
Instead of contacting every single DNS server to find out the location of a website, caching servers keep track of popular websites and their locations, so they don’t have to be queried again.
What Is A Reverse Lookup?
Reverse lookup is the process of finding the IP address of a given website. For example, if I want to know the IP address of www.google.com, I would perform a reverse lookup.
This means that I would send a request to Google asking them to tell me the IP address of www.google com.
Conclusion
A domain means the name of a website or organization. A DNS server is a device that keeps track of websites and their addresses.
A DNS server acts as a phonebook for websites. It stores information about each website in a database.
When someone types in a website address in the address bar of his web browser, the DNS server searches its cache for the website and returns the IP address.
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