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Hosting Terminology >> D
- Data Transfer This is the amount of data that is transferred from an account as visitors view the pages of the web site. If John Doe has a web site with lots of video, audio, and images that gets many visitors per day, he would have to make sure that he chooses a host that will allow his large amounds of data to be transferred. If he chooses a host that only allowed 200 MB of data transfer per month, and his site transferred 500 MB per month, then the host may stop half of his visitors from viewing his site and he could lose potential customers. Your best bet is to try to find a host that offers unlimited data transfer or at least a Gig of transfer. A gig is more than enough for most web sites. - Domain Name The unique name that identifies an Internet site. Domain Names always have 2 or more parts, separated by dots. The part on the left is the most specific, and the part on the right is the most general. A given machine may have more than one Domain Name but a given Domain Name points to only one machine. - Domain Name System (DNS) A distributed database of information that is used to translate domain names into Internet Protocol (IP) numbers. In other words, computers need numbers in order to function. The computer itself does not care whether you are yahoo.com or google.com. It has no idea how to find the name, it needs a number that identifies that name. So when you buy a domain, say www.whatever.com, it is nothing until you get it hosted somewhere and until that host assigns a number to your domain. A good analogy of this would be social security numbers and humans. Humans are identified primarily by their names, but government organizations use social security numbers to identify the person behind that name. - DSL (Digital Subscriber Line) A method for moving data over regular phone lines. A DSL circuit is much faster than a regular phone connection, and the wires coming into the subscriber’s premises are the same (copper) wires used for regular phone service. A DSL circuit must be configured to connect two specific locations, similar to a leased line. A commonly discussed configuration of DSL allows downloads at speeds of up to 1.544 megabits (not mega bytes ) per second, and uploads at speeds of 128 kilobits per second. This arrangement is called ADSL: “Asymmetric” Digital Subscriber Line. Another common configuration is symmetrical: 384 Kilobits per second in both directions. In theory ADSL allows download speeds of up to 9 megabits per second and upload speeds of up to 640 kilobits per second. DSL is now a popular alternative to Leased Lines and ISDN , being faster than ISDN and less costly than traditional Leased Lines. |
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