What is the purposes of DNS?
Can anyone please help me get a better understanding of the purposes/uses of DNS? I've searched this term several times on the internet and still don't have a clear understanding. Thanks in advance.
The Domain Name System (DNS) is one of the most important components of Internet infrastructure. If DNS is unavailable, you’ll have difficulty finding resources on the Internet and, likewise, others will be unable to find you.
That’s because DNS is the phone book that translates names such as https://johnurquiaga.com to Internet protocol (IP) addresses and vice versa.
DNS - Domain Name System is a system where we resolve a domain name ie. www.mydomain.com to the appropriate IP location for service (website or mail). So if you are looking for website and enter www.gohere.com the browser takes the name and uses a "name server" to lookup in a directory the name and the corresponding IP address on the internet. From there a request will be made to the server at that address to resolve the website that you want to look up.
The Domain Name System (DNS) is one of the most important components of Internet infrastructure. If DNS is unavailable, you’ll have difficulty finding resources on the Internet and, likewise, others will be unable to find you. That’s because DNS is the phone book that translates names such as https://johnurquiaga.com to Internet protocol (IP) addresses and vice versa. DNS saves us from having to remember the IP addresses of all of our favorite sites, and it allows Web pages to link to others by name, not by IP address. Finding hosts by name allows IP addresses to change over time, allowing sites to grow, change location, or reconfigure. But, DNS does a whole lot more than just name-to-address mapping. Understanding the basic structure, function, and operations of DNS is an important foundation for all modern-day IT professionals.
The Domain Name System (DNS) is a hierarchical naming system for computers, services, or any resource participating in the Internet. It associates various information with domain names assigned to such participants. Most importantly, it translates domain names meaningful to humans into the numerical (binary) identifiers associated with networking equipment for the purpose of locating and addressing these devices worldwide. An often used analogy to explain the Domain Name System is that it serves as the "phone book" for the Internet by translating human-friendly computer hostnames into IP addresses. For example, www.example.com translates to 220.127.116.11.
The Domain Name System distributes the responsibility of assigning domain names and mapping those names to IP addresses by designating authoritative name servers for each domain. Authoritative name servers are assigned to be responsible for their particular domains, and in turn, can assign other authoritative name servers for their sub-domains. This mechanism has made the DNS distributed, fault tolerant, and helped avoid the need for a single central register to be continually consulted and updated.
DNS can help you for instance to set names of servers in stead of trying to reach a server where you have a website or data, with the DNS you can reach this it resource with a name that you choose in stead of using ip address, names are easier to remember than the ip address example :10.147.155.124
DNS - Domain Name System is a system where we resolve a domain name ie. www.mydomain.com to the appropriate IP location for a service. (website or mail) So if you are looking for website and enter www.gohere.com the browser takes the name and uses a "name server" to lookup in a directory the name and the corresponding IP address on the internet. From there a request will be made to the server at that address to resolve the website that you want to look up.
That is an simplified version of what goes on.
When you move websites. Someone needs to update the name servers of your new location. There is a whole technology behind the update of the name servers so that it can take a day or so from the time you make the change until someone finds your new location.
I trust this helps.
In simple word DNS is just a mapping of IP Addresses to the website name. Websites are identified in computer systems by a series of numbers called IP (Internet Protocol) addresses. For example the IP of www.google.com is 18.104.22.168, you can access google by just typing this IP address but remembering the IP address of all the sites is not possible so to make one abstract layer for user, Network community uses DNS that just maps this IP to domain names. You can learn what DNS servers are being used in your own setup by using a Windows command. In Start/Run type "cmd". When a black box appears, type "ipconfig/all". This will display the DNS servers running. Apart from this DNS has other use alos in mail systems etc. If you want to know further detail you can refer this link "https://www.ietf.org/rfc/rfc1034.txt" written by IETF(Internet Engineering Task Force) .
DNS or Domain Name Systems is basically a phone book for the internet. Instead of using IP's, a DNS is assigned as a name and attached to the ip address. So for example, 10.10.211.209 is the IP address associated with Joescafe.com. Instead of having to search by the IP, one uses the URL joescafe.com (DNS) and links to that IP address and finds the website. Check out DYN.com. They specialize in DNS optimization. This term refers to a services that allows you to link to the IP/URL at the most efficient route, Load Balancing etc. Hope this helps.
DNS IS A DOMAIN NAME SERVER IT RESOLVES IP ADDRESSES INTO NAMES LIKE www. cyhthiahope.com etc
They maintain a directory of domain names and translate them to Internet Protocol (IP) addresses. This is necessary because, although domain names are easy for people to remember, computers or machines, access websites based on IP addresses,
So when you type www.mosaichub.com since its easy for your to remember, Internally using DNS Services, This domain name is translated into IP Address which is [22.214.171.124]. You browser request to this IP address and then a default page is rendered back.
A DNS resolves names like www. hardsoft .al with an ip address. The protocols that make the internet work use numbers. A DNS has a database of numbers that match up with names so when you type www. hardsoft .al the closest DNS resolves that with an IP address which tcp/ip protocols can use to view hardsoft.al.
DNS allows a human to use a name to identify a location of a machine. Most people are familiar with using names to find a website, such as www.apple.com. The name is converted to a series of numbers (IP Address), which the Internet uses to find computers. Basically a DNS server makes it easier to find computers by names versus numbers.
Websites are identified in computer systems by a series of numbers called IP (Internet Protocol) addresses. So that humans do not have to remember multiple numbers for all the websites they want to visit, these numbers are matched by names in a database table housed on special types of computers called Domain Name Servers. The DNS server translates the website names into the correct IP address.
Without domain name servers, navigating the Internet would become an extremely cumbersome task. Given the millions of websites in existence, keeping track of these by IP number would be impossible.
When you type a name such as www.ehow.com into a browser, the request first goes to a DNS server. If that server can translate the name to an IP address, it does so. Otherwise, the request is forwarded to a higher level server.
According to Dan Kaminsky, a security researcher, the Internet has about 9 million DNS servers. About 10 percent are vulnerable to malicious attacks (see Additional Resources).
You can learn what DNS servers are being used in your own setup by using a Windows command. In Start/Run type "cmd". When a black box appears, type "ipconfig/all". This will display the DNS servers running.
When DNS servers develop problems or are maliciously hacked, you may find yourself on what you thought was the web page wanted but actually redirected to fraudulent sites.
DNS or Domain Name Servers acts in a similar way on Internet to your phone book. The machines communicate between with IP addresses e.g. 192.168.1.1 than domain names e.g. www,google.com. So DNServers stays like a 'oltimes telephone operator. When you ask for www.google.com, behind the scene DNS translate your request to a IP address
Information from all the domain name servers across the Internet are gathered together and stored at the Central Registry. Host companies and Internet Service Providers interact with the Central Registry on a regular schedule to get updated DNS information.
A DNS sever is where the computer goes to translate a web address or computer name into an IP address.
Basically, you type www.ExampleOne.com into Internet Explorer (or any other web browser), the browser goes to a DNS server that you have either specified or automatically been provided with, it converts 3xpgroup into an IP address, for example 10.0.0.8.
I like to use analogies when describing technical concepts, so here goes.
Consider where you live. It can be pinpointed on a map by using latitude and longitude. However, if someone asks for directions to your house and you provide them with a latitude and longitude, they are most likely going to give you a confused look. They are used to being provided with a street address (and city, state and ZIP code if in the US and they don't live in your town) to find you.
The Internet is similar, in that anything you use on the Internet has an IP address assigned to it, such as 126.96.36.199. If you tell someone -- "I've discovered this awesome website...188.8.131.52!!!!" they are going to give you confused looks. If you tell them the web site is "mosaichub.com" or more appropriately "www.mosaichub.com" they are more likely to understand you and be able to act on your information. Think of IP addresses as the latitude and longitude of the first example, while DNS is the street address.
DNS -- or Domain Name Service (or Domain Name System, depending on who you ask) is the Internet process that translates IP addresses (such as 184.108.40.206) into host names that are easy to remember (such as "www.mosaichub.com").
When you enter "www.mosaichub.com" into a web browser, behind the scenes the servers you are communicating with translate that into an IP address, and that IP address is used to transport information over the Internet from where it "lives" in the cloud to your computer.
There's a lot going on in addition to that, but until you get a handle on that basic concept, delving further will probably only be confusing. For example, a single host name such as www.mosaichub.com can have multiple IP addresses assigned to it. However, that's not important to grasping the basics of what DNS does.
I hope that helps!
Domain Name Servers (DNS) are the Internet's equivalent of a phone book. They maintain a directory of domain names and translate them to Internet Protocol (IP) addresses. This is necessary because, although domain names are easy for people to remember, computers or machines, access websites based on IP addresses.
What the the other answers state is true. It is like directory of sites. What you need to know is that every computer on the Internet is assigned an Internet Protocol (IP) address. All the computers speak to each other using these addresses. The problem is that people have a hard time remembering addresses. So a system was designed in the mid 80s to help translate the IP addresses to names we can remember.
The domain name also gained another function later. As IP addresses became scarce, websites (and other types of sites) were designed to be "stacked" so that multiple sites can use the same IP address. The domain name is used, as part of the header, to distinguish different sites on the same IP.
This tutorial ( http://computer.howstuffworks.com/dns.htm ) explains what I just said and goes a bit more in depth, if you want to learn more.
Your Company is a Unique service to you and your clients. Registering your Company name is a Domain and is translated into a IP address. Your Host then uses your Statement of Purpose-Service Outline to mark words used to find you in a Boolean search. Your web cite is then listed in the search results and the IP address takes them to your cite.
DNS (Domain Name System) is like a telephone directory for the internet.
Generally speaking, for all of the wonderful things that computers can do, they can't read English (or any other human language for that matter. So when you type www.google.com into a web browser, it doesn't actually understand what you mean. So it takes what you've typed and searches for it in a directory, which is a huge list of web addresses.
When it finds www.google.com in the list, next to it will be an entry that the computer does understand and it's called an IP address. Like telephone numbers, all IP addresses are unique and the IP address for Google's website is 220.127.116.11. Your computer will now 'dial' this number and the result is that your browser will go to www.google.com
I hope this helps.
PS: I've tried to keep this explanation as reader friendly as possible by using a simple analogy, but in doing so there are some minor technical inaccuracies that my fellow geeks may be going crazy over right now. However, this is basically how DNS works :)
The phonebook concept is a good one. The IP address is an address to a specific machine. (Not necessarily 100% true, but true enough for this discussion). The domain name is used to provide a "look-up" to a (server) machine's actual IP address.
If the server is moved and ends up getting a new IP address, the DNS only needs to be updated. After that, the requests will start targeting the new machine. If we only used numbers, you'd never be able to switch hosting providers.
NB: The domain name is only part of the "lookup" name. abc.yourname.com and def.yourname.com can each point to two separate IP addresses. You've seen this before, as in: ftp.yourname.com, smtp.yourname.com, pop3.yourname.com.