elementary schools, as well as to individuals within (Unlimited web hosting)
elementary schools, as well as to individuals within a geographical region of the United States. To facilitate the entry of other countries to the Internet, the International Organization for Standardization (ISO) has defined a set of two-letter codes that are assigned to each country. Within each country, there are naming authorities that are responsible for organizing the subdomains. Some subdomains are organized by categories, while others are structured by geographic location. Tip Several RFCs (Request for Comments) define the domain name system. RFC 1034 covers domain name concepts and facilities. RFC 1035 is a technical description of how DNS works. RFC 1480 describes the “us” domain. For a more general description of DNS, there is RFC 1591. Common top-level domain names Of the generic TLDs in use today, several are used throughout the world, while two are available only in the United States. Here are descriptions of common TLDs: com Businesses, corporations, and other commercial organizations fall into this TLD. As the Internet has grown into an important tool for commerce, domains in this TLD have grown at a dramatic rate. edu Colleges and universities fall under this TLD. Although it was originally intended for all educational institutions, two-year colleges, high schools, and elementary schools are now organized by location under country codes (such as US in the United States). gov This TLD is restricted to U.S. federal government locations. Local government sites are expected to fall under the us domain. int This domain includes international databases and organizations created by international treaties. mil U.S. military organizations fall under this domain. net Computer network providers fall under this domain. org A variety of organizations that are neither governmental nor commercial in nature fall under this catchall TLD. Domain name formation As noted earlier, domain names are hierarchical, which means there can be subdomains beneath second-level domains, as well as host computers. (Second-level domains are the names directly below the TLDs that are assigned to individual people and organizations.) Each subdomain is separated by a dot (.), starting with the top-level domain on the right and with the second-level domain and each subsequent subdomain appearing to the left. Here is an example of a fully qualified domain name for a host: baskets.crafts.handsonhistory.com In this example, the top-level domain is .com. The second-level domain name assigned to the organization
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