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Top-level domain

 
Small Business Encyclopedia: Internet Domain Names
 

An Internet domain name is a string of typographic characters used to describe the location of a specific individual, business, computer, or piece of information online. Formally known as the Uniform Resource Locator or URL, it is often considered to be the address of a certain World Wide Web site. Obtaining an Internet domain name is a vital step for small businesses hoping to establish a presence on the Internet. "To be a major league team in the Internet game, your business will want a domain name of its own, " Vince Emery wrote in How to Grow Your Business on the Internet. "These valuable intellectual assets … make the difference in your image between Internet pro and fumbling amateur. Your domain name is more than your address. It tells the world who you are and what you are.

A typical domain name consists of several parts. As an example, consider an auto parts business with the domain www.spareparts.com. The letters www. before the domain name mean that what follows describes the location of a site on the World Wide Web. The last two or three letters of a URL are known as its top-level domain. About 250 top-level domains existed on the Internet as of the year 2000. Some of the most common top-level domains include .com, which usually indicates a business or commercial site; .org, which generally describes a nonprofit, charity, or cultural organization site; .gov, which indicates a governmental site; and .net, which is most often used by network-related businesses. Other common top-level domains are country codes, like .us for United States and .au for Australia. Small businesses can put as many subdomains as needed in front of their domain names. For example, the customer service department of the aforementioned auto parts business might be designated as www.service.spareparts.com.

Internet domain names are fairly easy and inexpensive to obtain. The process of registering a domain name involves searching to see if the desired name is already taken, filling out a form online, and paying a fee of $100 or so. But small businesses may find it exceedingly difficult to secure the exact domain name they want. As Jacqueline Emigh noted in Computer-world, the supply of available domain names is dwindling rapidly, particularly in the popular .com toplevel domain. In some cases, the best domain names are simply already being used by other individuals or firms. Some larger businesses will register several different domain names in case they might be needed in the future, or in order to protect themselves against competing sites. But in other cases, the best domain names are held by cybersquatters or cyberpirates. These individuals register a number of domain names that are likely to be coveted by businesses in hopes of selling them in the future for a significant profit. The U.S. government and several international authorities are beginning to crack down on the activities of cybersquatters.

Choosing and Registering a Domain Name

For small businesses hoping to establish a presence on the World Wide Web, choosing an Internet domain name is nearly as important as choosing a company name. The name must fit the firm's overall marketing strategy and convey a positive message to potential customers. In addition to registering a domain name for the company's Web site, small business owners might also consider registering the names of major products, important markets, or well-known slogans. As Bill Roberts explained in Electronic Business, small business owners must make sure that the domain names they choose are not overly long and avoid unconventional spellings that may be difficult for people to remember. Since doing business on the Internet immediately exposes companies to international markets, it is also important to be careful of trademark infringement issues and cultural problems in other languages.

There are a number of ways to handle the registration of an Internet domain name. In most cases, an Internet Service Provider (ISP) can register a small business's domain name and maintain the company's Web site on its server. The ISP can conduct an online search to make sure that the domain name does not duplicate any existing name or infringe on the trademark of any other business. Although registering through an ISP can simplify the process for small businesses, it is important for the business to secure ownership of the domain name. Otherwise, it may be difficult to keep the domain name if the company decides to change ISPs.

Small business owners can also register a domain name through Network Solutions Inc. (NSI), a private company which began registering names in 1993 through a cooperative agreement with the U.S. government. The process involves conducting a free online search, filling out a form on the NSI Web site (networksolutions.com), and paying a fee of approximately $70 for two years of ownership. Finally, small businesses can register domain names through the Internet Corporation for Assigned Names and Numbers (ICANN), a nonprofit organization that has been taking over increased responsibility for the registration process (details are available online at www.icann.org).

With authority from the U.S. government, ICANN has begun addressing the problems of Internet site registration, including the diminishing supply of domain names and the resolution of disputes over names. As Walter Eidson outlined in the Washington Business Journal, ICANN implemented a new dispute resolution policy on January 1, 2000, to settle questions over ownership and use of popular domain names. In order to dispute another party's use of a domain name, a small business must prove that the name is identical or confusingly similar to a previously registered trademark and that the other party has no legitimate business interest in it. Businesses are unlikely to prevail in such disputes if the other party had registered the name in good faith and was using it for legitimate purposes. But businesses do have recourse in cases where the other party is using the name in bad faith—for example, holding it for the purpose of selling it, blocking the legitimate owner from using it, or attracting customers through deception.

Further Reading:

Dowling, Paul J., Jr., et al. Web Advertising and Marketing. Rocklin, CA: Prima, 1996.

Eidson, Walter. "How to Protect, Defend an Internet Domain Name." Washington Business Journal. January 14, 2000.

Emery, Vince. How to Grow Your Business on the Internet. 3d Ed. Scottsdale, AZ: Coriolis Group, 1997.

Emigh, Jacqueline. "Domain Naming." Computerworld. September 27, 1999.

Roberts, Bill. "The Name Game." Electronic Business. November 1999.

See also: Search Engine; Web Page Design

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Wikipedia: Top-level domain
 

A top-level domain or domain name (TLD) is the highest level of domain names in the root zone of the Domain Name System of the Internet. For all domains in lower levels, it is the last part of the domain name, that is, the label that follows the last dot of a fully qualified domain name. For example, in the domain name www.example.com, the top-level domain is com (or COM, as domain names are not case-sensitive). Management of most top-level domains is delegated to responsible organizations by the Internet Corporation for Assigned Names and Numbers (ICANN), which operates the Internet Assigned Numbers Authority (IANA) and is in charge of maintaining the DNS root zone.

Originally, the top-level domain space was organized into three main groups,[1] Countries, Categories, and Multiorganizations. An additional temporary group consisted only of the initial DNS domain,[2] arpa, intended for transitional purposes toward the stabilization of the domain name system.

Countries are designated in the domain name system by their English two-letter ISO country code[3]. This group of domains is therefore commonly known as country-code top-level domains (ccTLD).

The Categories group has become known as the generic top-level domains. Initially this group consisted of GOV, EDU, COM, MIL, ORG, and NET.

In the growth of the Internet, it became desirable to create additional generic top-level domains. Some of the initial domains' purposes were also generalized, modified, or assigned for maintanance to special organizations affiliated with the intended purpose.

As a result, IANA today distinguishes the following groups of top-level domains:[4]

In addition, a group of internationalized domain name (IDN) top-level domains has been installed under test for testing purposes.

The authoritative list of currently existing TLDs in the root zone is published at the IANA website at http://www.iana.org/domains/root/db/ and a Wikipedia list exists.

Contents

Infrastructure domain

The domain arpa was the first Internet top-level domain. It was intended to be only temporary, aiding in the transition of traditional ARPANET host names to the domain name system. However, after it had been used for reverse DNS lookup, it was found impractical to be retired, and is used today exclusively for Internet infrastructure purposes such as in-addr.arpa for IPv4 and ip6.arpa for IPv6 reverse DNS resolution, uri.arpa and urn.arpa for the Dynamic Delegation Discovery System, and e164.arpa for telephone number mapping based on NAPTR DNS records. For these historical reasons, arpa is sometimes considered to be a generic TLD.

Reserved domains

RFC 2606 reserves the following four top-level domain names to avoid confusion and conflict.[5] They may be used for various specific purposes however, with the intention that these should not occur in production networks within the global domain name system:

  • example: reserved for use in examples
  • invalid: reserved for use in obviously invalid domain names
  • localhost: reserved to avoid conflict with the traditional use of localhost as a hostname
  • test: reserved for use in tests

The test domain has seen usage by ICANN in the testing of internationalized domain names, a program started in 2007.[6][7]

  • xn--kgbechtv       Arabic (إختبار)
  • xn--hgbk6aj7f53bba Persian (آزمایشی)
  • xn--0zwm56d        Chinese, simplified (测试)
  • xn--g6w251d        Chinese, traditional (測試)
  • xn--80akhbyknj4f   Cyrillic (испытание)
  • xn--11b5bs3a9aj6g  Hindi (परीक्षा)
  • xn--jxalpdlp       Greek (δοκιμή)
  • xn--9t4b11yi5a     Korean (테스트)
  • xn--deba0ad        Yiddish (טעסט)
  • xn--zckzah         Japanese (テスト)
  • xn--hlcj6aya9esc7a Tamil (பரிட்சை)

Historical domains

In the late 1980s InterNIC created the nato domain for use by NATO. NATO considered none of the then existing TLDs as adequately reflecting their status as an international organization. Soon after this addition, however, InterNIC also created the int TLD for the use by international organizations in general, and persuaded NATO to use the second level domain nato.int instead. The nato TLD, no longer used, was finally removed in July 1996.

Other historical TLDs are cs for Czechoslovakia (now cz for Czech Republic and sk for Slovak Republic), dd for East Germany (using de after reunification of Germany), and zr for Zaire (now cd for Democratic Republic of the Congo). In contrast to these, the TLD su has remained active despite the demise of the Soviet Union that it represents.

Proposed domains

About the time that ICANN discussed and finally introduced[8] aero, biz, coop, info, museum, name, and pro TLDs, site owners and USENET users argued that a similar TLD should be made available for adult and pornographic websites to settle the dispute of obscene content on the internet and the responsibility of service providers under the questionable Communications Decency Act of 1996. Several options were proposed including xxx, sex and adult, but ICANN has not created any.[9]

An older proposal[10] consisted of seven new gTLDs arts, firm, info, nom, rec, shop, and web. Later biz, info, museum, and name covered most of these old proposals.

During the 32nd International Public ICANN Meeting in Paris in 2008,[11] ICANN started a new process of TLD naming policy to take a "significant step forward on the introduction of new generic top-level domains." This program envisions the availability of many new or already proposed domains, as well a new application and implementation process.[12] Observers believed that the new rules could result in hundreds of new gTLDs to be registered.[13] Proposed TLDs include music, berlin and nyc.

Pseudo-domains

In the past the Internet was just one of many wide-area computer networks. Computers not connected to the Internet, but connected to another network such as BITNET, CSNET or UUCP, could generally exchange e-mail with the Internet via e-mail gateways. For relaying purposes on the gateways, messages associated with these networks were labeled with suffixes such as bitnet, oz, csnet, and uucp, but these domains did not exist in the public domain name system.

Most of these networks have long since ceased to exist, and although UUCP still gets significant use in parts of the world where Internet infrastructure has not yet become well-established, it subsequently transitioned to using Internet domain names, so pseudo-domains now largely survive as historical relics. One notable exception is the 2007 emergence of SWIFTNet Mail, which uses the swift pseudo-domain.[14]

local deserves special mention as it is required by the Zeroconf protocol. It is also used by many organizations internally, which will become a problem for those users as Zeroconf becomes more popular. Both site and internal have been suggested for private usage, but no consensus has emerged[citation needed].

TLDs in alternative roots

ICANN's slow progress in creating new gTLDs, and the high registration costs associated with TLDs, contributed to the creation of alternate root servers with their own sets of TLDs. At times, browser plugins have been developed to allow access to some set of "alternative" domain names even when the normal DNS roots are otherwise used.

The anonymity network Tor has a pseudo-domain onion, which can only be reached with a Tor client because it uses the Tor-protocol (onion routing) to reach the hidden service in order to protect the anonymity of the domain.

See also

References

  1. ^ RFC 920, Domain Requirements, J. Postel, J. Reynolds, The Internet Society (October 1984)
  2. ^ RFC 921, Domain Name System Implementation Schedule - Revised, J. Postel, The Internet Society (October 1984)
  3. ^ Codes for the Representation of Names of Countries, ISO-3166, International Standards Organization (May 1981)
  4. ^ IANA root zone database
  5. ^ RFC 2606 (BCP 32), Reserved Top Level DNS Names, D. Eastlake, A. Panitz, The Internet Society (June 1999)
  6. ^ ICANN IDN wiki
  7. ^ IANA (ICANN) list of extant TLDs
  8. ^ InterNIC FAQs on New Top-Level Domains
  9. ^ RFC 3675: sex Considered Dangerous
  10. ^ (historical) gTLD MoU
  11. ^ "32nd International Public ICANN Meeting". ICANN. 2008-06-22. http://par.icann.org/. 
  12. ^ "New gTLS Program". ICANN. http://www.icann.org/en/topics/new-gtld-program.htm. Retrieved on 2009-06-15. 
  13. ^ ICANN Board Approves Sweeping Overhaul of Top-level Domains, CircleID, 26 June 2008.
  14. ^ SWIFT - About SWIFT - Press room - SWIFTNet Mail now available
  • Addressing the World: National Identity and Internet Country Code Domains, edited by Erica Schlesinger Wass (Rowman & Littlefield, 2003, ISBN 0-7425-2810-3) [1], examines connections between cultures and their ccTLDs.
  • Ruling the Root by Milton Mueller (MIT Press, 2001, ISBN 0-262-13412-8) [2], discusses TLDs and domain name policy more generally.
  • RFC 1591 - Domain Name System Structure and Delegation
  • RFC 3071 - Reflections on the DNS, RFC 1591, and Categories of Domains

External links


 
 

 

Copyrights:

Small Business Encyclopedia. Encyclopedia of Small Business. Copyright © 2002 by The Gale Group, Inc. All rights reserved.  Read more
Wikipedia. This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Top-level domain" Read more

 

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