Domain names

 - The plain-language address that points to a numeric internet protocol (IP) address. A fully qualified domain name includes a top-level, second-level, and third-level component. Domain name structure is- (1) Top-level - The extension or country code located at the right of the domain name. Top-level domain names that do not include a country code are assumed to be in the United States. Examples - .gov for government, .fr for France; (2) Second-level - The top-level combined with a name which describes the company or organization. Example - state.gov; (3) Third-level - The second-level combined with the name of the host server where web-based services can be located. Examples - www.state.gov identifies the web server at the Department of State within the Federal government; www2.state.gov might identify a second web server in the Department of State; and (4) Sub-domain - A further division of the second-level. Example - webx.irm.state.gov points to a host server named webx on subdomain irm of domain state.gov.

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