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3 Simple Ways To Save A Bunch Of Money When Buying A New Computer!
Looking to buy a new computer?
Overwhelmed by all of the options available to you?
Stressed by the high cost of computers today?
For most people, buying a new computer does not have to be as stressful as buying a new car. Nor does it have to...
Personal Digital Darkroom
Why a digital darkroom? First of all this is a misnomer. You actually don’t need a darkroom. All that you need to have is a space for a printer and if you’re still using film, a film scanner. You need not set aside a large chunk of your time in...
User Friendliness: Do Computers Have to be Clinical and Boring?
While sleeping through a lecture recently I roused for just long enough to catch the lecturer saying that "Error messages should not try to be funny or amusing, they should be clear and concise". This got me thinking about the ever-elusive goal of...
Wehner's ANIMATE DOS Command
There are many ways of making animated images for the Internet, but this simple tool is just 2344 bytes. That means that it can easily be carried on a floppy disk, and takes up little space. The marble bust that you will see is Dr. Thomas Addison...
Where Did I Save That Document? Organizing Your Computer Files
What happened to the paperless office? We generate more paper now than we
ever did
before the advent of the computer! A computer's hard drive can get just as
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any other part of the office. With seemingly limitless storage...
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What makes the DNS System Work?
As I mentioned in my previous post about DNS, each time you browse to a web site or follow a link, or send someone an email, the domain name system (DNS) works behind the scenes translating the name into the correct number (IP address).
How does this process work?
Well, the guts of the DNS system consists of 13 servers called "Root Servers". Servers are simply computers connected to the Web 24/7. These 13 root servers are coordinated by ICANN and have been placed at various spots around the world in order to spread the workload and for backup purposes. More about ICANN plus at brief history of the Internet here.
So what's so special about these root servers?
These 13 root servers contain the vital data with the IP addresses of all of the top level domain (TLD) registries. This includes both the well-known generic TLDs like .COM, .NET, .ORG, etc. as well as the 244 country registries such as .CN (China), .FR (France), .DE (Germany), and so on.
This data is vital because if it isn't 100% correct, it might not be possible to locate a registry on the Internet. In DNS-speak the information must be unique and authentic.
How is this information used?
All across the world there are thousands of servers called "Domain Name Resolvers". These Resolvers routinely save (cache) the information they get from users querying the root servers. The Resolvers are located with Internet Service Providers (ISPs) and other related networks, and are used for responding to users' requests to resolve a
domain name; i.e. to find the IP address corresponding to the domain name of the web site the user wants to visit.
For example, what happens when you request to visit, say, Yahoo.com?
Your request is first sent to a local domain name resolver. The resolver then splits the request into its components. It knows where to find the .com registry because it copied that bit of information from a root server earlier. It then sends the request over to the .COM registry to find the IP address of yahoo.com. The answer is then forwarded back to your computer and the website then appears in your browser. Done!
Why do we need the Domain Name Resolvers? Why don't we use the root servers direct?
The answer is that even though the Resolvers basically contain the same information, the 13 root servers just couldn't handle thousands of millions of requests each day! It would slow the system to snail pace.
About The Author - Copyright © Fred Bunzl - All Rights Reserved. Fred Bunzl has more than four year's experience in the domain name business, being partnered with three of the Web's largest ICANN accredited domain name registrars through his sites: DomainsNow4U.com®, CheapToRegister.com and 1stDomainNameServices.com. Fred is a member of the International Council of Online Professionals, i-cop.org, dedicated to promoting online business ethics and integrity. For more information about Fred Bunzl's services, visit http://www.domainregistrationtips.info
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