The Fiber Optics Illustrated Dictionary - Part 30 fills a gap in the literature by providing instructors, hobbyists, and top-level engineers with an accessible, current reference. From the author of the best-selling Telecommunications Illustrated Dictionary, this comprehensive reference includes fundamental physics, basic technical information for fiber splicing, installation, maintenance, and repair, and follow-up information for communications and other professionals using fiber optic components. Well-balanced, well-researched, and extensively cross-referenced, it also includes hundreds of photographs, charts, and diagrams that clarify the more complex ideas and put simpler ideas into their applications context | Fiber Optics Illustrated Dictionary An email server at the local domain handles the processing of mail once it is received from the ISP and it can route it according to the needs of the local system. The domain name is expressed alphanumerically with dots between each of the levels or portions of the domain with the assigned domain as the last two parts of the name. Since 1995 the number of registered domain names has risen from 100 000 to over 10 million. Within the . domain names are subdivided into various categories. Outside the . the extension is usually a designator for the country. The North American Domain Name Extensions chart shows a sample of familiar domain name extensions. The appendix includes a more complete list of over 200 Internet domain name extensions from around the world. See Internet Corporation for Assigned Names and Numbers. domain name registration A necessary administrative step for individuals and organizations who wish to have a unique domain name on the Internet. Unlike state registrations of company names or companies in different industries that share a common name there can be only one of a particular name on the global Internet. This fact has made domain names hot commodites with companies buying and selling domain names the way logos are sometimes bought and sold. To register a domain name you must have a site ready to come on line and you will usually go through your ISP to establish the name for the site. In 1995 registration changed to a fee system in 1998 it was about 100 for initial registration and 50 per year to retain the name. Now it s much less. See Domain Name System InterNIC IANA. domain name server A computer with server capabilities that communicates with the Domain Name Service DNS on the Internet after having registered its own unique ID. The serving computer provides an Internet Protocol IP address to the DNs for a domain name that is not fully qualified does not end in a dot . For individual users this is .
