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Presented by Daniel Toriola There are vast web pages and forums dedicated to domain investing and how to sell domains. Nobody is showing these people the big picture, merely incomplete pieces to the puzzle that might generate a few small sales and big disappointments. Click here to know more ANNOUNCEMENT: Our WebSite Builder Plans Are Now Available With Free Trial! If You Can Use MicroSoft Word, You Can Build A WebSite.. As Easy As 1-2-3! Try Us.. What Have You Got To Lose, Anyway? Click here to know more How to understand the Domain Name System By Clare Lawrence How to understand the Domain Name System by Clare Lawrence How to understand the Domain Name System By Clare Lawrence 13th August 2004 Ever wonder why DNS systems came into existence? Efficiency. Every computer has a distinct IP address, and the Internet needed an elite method for obtaining these addresses and for managing the system as a whole. Enter ICANN. The Internet Corporation for Assigned Names and Number manages the DNS root of the Internet domain namespace. ICANN’s role is to manage the assignment of identifiers, ensuring that all users have unique names. The DNS system is run by a series of servers called DNS servers. ICANN manages the root DNS domains, under which are the top-level domains. It also manages: Organizational domains Geographical domains Reverse domains Beneath the top-level domains are other naming authorities such as Nominet, the UK’s naming authority. How does a DNS Query work? The process occurs in two parts. Firstly, a name query begins at a client computer and is passed to DNS client service for resolution. When the query cannot be resolved locally, DNS servers are queried. For example, when a web browser calls the fully qualified domain name www.discountdomainsuk.com, Domain Guru Read: Insider's Guide To Domain Name Speculation, and learn the secrets of the domain professionals! Page 1 Presented by Daniel Toriola the request is passed on to the DNS client service to resolve the name by using locally cached information. If the query is held in the cache, then the process is complete. If, however, the query cannot be answered locally, the DNS client service uses a server list (ordered in sequence) to query external DNS servers. When a DNS server receives a query, it first checks to see if it is authoritive for that domain name. If it is authoritive, it resolves the name, and the process is complete. If the DNS server is unable to resolve the query, it in turns queries other DNS servers, using a process known as recursion. DNS servers make use of root hints to assist in locating DNS servers, which are able to provide the required result. In this way, DNS queries are minimised and the Internet is able to operate quickly and effectively. A typical query may run as follows: Client contacts Nameserver A looking for www.discountdomainsuk.com. Nameserver A checks its cache, but can’t answer, so it queries a server authoritive for the Internet root. The root server responds with a referral to a server authoritive for the .com domains. NameserverA queries the the .com server and gets referred to the server authoritive for www.discountdomainsuk.com. Nameserver A queries this server and gets the IP address for www.discountdomainsuk.com. Nameserver A replies to the client with the IP address. Queries can return answers that are authoritive, positive, negative or referral in nature. In the event of a negative answer, another DNS server is queried. Clare Lawrence is CEO of Discount Domains Ltd – A leading UK provider of Domain name registration and Web Hosting services. Please feel free to re-publish this article provided this reference box remains together with a hyperlink to http://www.discountdomainsuk.com Clare can also be contacted on Clare@discountdomainsuk.com. Dnclassifieds.com Domain Appraisal Service, with Free Domain Ads & Resources to help you sell your domain investments. Page 2 Presented by Daniel Toriola All About The DNS Domain Name System By Edwardo Mascasas We all know that in the world of domain names today, the presence of the DNS domain name system is very much significant. It is interesting to know that the acronym DNS actually stands for Domain Name System/Service/Server. However, I will be using the term DNS domain name system here to provide you with a clear knowledge about the meaning of this particular thing. The DNS domain name system is actually a powerful tool that contributes a great part in the domain name process. It is often described as an internet service that translates or transforms the domain names into an IP or Internet Protocol address. Aside from knowing such basic function of the DNS domain name system, it is also interesting to learn that a basic possession of the DNS domain name system is caching. This property takes place in situations when a server welcomes information about a mapping, it caches that information. Therefore, with such function, a later question for similar mapping can use the cached output, and will not result to additional questions to other servers. And generally, the DNS domain name system applies the caching to optimize the cost of the search. But how does the DNS domain name system caching works? In terms of caching, it is very nice to know that every server has a cache for currently applied names along with records of where the mapping data for a particular name was taken. So when a particular client is asking the server to determine a certain domain name, the DNS domain name system then does check if it has the power for a domain name, and if it does, the system doesn’t need to cache the information. However, if it has no authority for a domain name, the DNS domain name system then checks its cache whether the domain name has been resolved currently, and if yes, the DNS domain name system reports the caching data to its clients. There are some instances that the DNS domain name system cache can be examined when the system cached the data once, but didn’t adjust it. Due to the reason that the information about a certain domain name can be changed, the server may have inaccurate data in its caching table. There is a certain value known as the Time to Live or known as TTL which is applied when to age the information. So whenever an authority responds to a request for a domain name, it then involves a Time to Live value in the answer which indicates how long it assures the binding to linger. A Simple, Beautiful, Effective, Sales Magnet That Grabs Your Visitors' Pleasant Attention and Demands ACTION And Makes Them BUY... Visit http://www.flyinads21.com Active hyperlink must stay with article. The Science Of Abundant Life A complete, simple, practical, easy-to-understand, step-by-step system for getting rich, being healthy, & becoming successful! Page 3 Presented by Daniel Toriola Related eBooks: All About The DNS Domain Name System Domain Name Suggestions For Success Registering a domain name IP Address And Domain Name – What’s The Connection? Renew Domain Names The Best Way Get more Free PDF eBooks at FreePDFeBooks.com Related Products: Domain Alarm - Is your site working? Home Vegetable Garden Palmistry Dream Psychology The Ultimate Ad Tracking Tool Malamaal.com: A genuine resource center for Quality Ebooks and Softwares This PDF eBook is for free Distribution only, it cannot be SOLD Secrets Of Charisma Revealed Learn to Use Charisma to Empower, Enhance and Enrich Your Life and The Lives of Others. Click here to know more Powered By FreePDFeBooks.com ReBrand this PDF eBook with your Name / URL / ClickBank Affiliate ID for Free Understand Accounting Software Plain English ebook, invaluable to all businesses on how to understand all aspects of setting up and using accounting software. Page 4
