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Database: A collection of information organized in a way that allows the quick selection, sorting, and reorganization of data.

Datacenter: Also called a NOC (Network Operations Center), a datacenter is a physical center from where networks are managed. Typically, a datacenter has hundreds or even thousands of Web servers with multiple connections to the backbone, and power backup systems.

Data Transfer: This is the amount of data you are allowed to deliver from your site in a given month. The limit is usually calculated in GB with 1 GB usually amounting to 30,000 - 50,000 page views.

Dedicated Servers: A single server dedicated to a single customer. Most appropriate for users that require lots of disk space or data transfer, as well as sites that are database intensive or have specific software requirements.

Dedicated Web Hosting: This is a hosting type that gives a website sole occupation of a web server. This gives the webmaster full control and access to the back end server administration.

Disk Space: Amount of storage space allotted to a Web site. Disk space can be used to store pictures, HTML files, videos, programs, and anything else used by the Web site.

DNS: Stands for "Domain Name System," or "Domain Name Server." DNS is a service that translates domain names into IP addresses. It is essential for finding the right Web site based on the domain name.

Domain Name: A name that is typically the first part of a URL and identifies the Web site. Example: www.yahoo.com. Domain names are used to make sites easier to remember.

Domain Name Registration: The process whereby a unique domain name is selected and registered by a user, giving the user the right to use that domain name for their Web site. Most Web hosts allow you to register a domain when you sign up for Web hosting.

DS-3: A fast connection to the Internet Backbone. Also called a T-3 line, a DS-3 connection is a phone line that supports a transfer rate of around 43 Mbps.

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