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Domain Names
 

Domain Names

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A brief intro about Internet Domain names

A brief intro about Internet Domain names

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    Domain Names Domain Names Presentation Transcript

    • Valid Internet Addresses
    • Internet Addresses
      • Also known as Domain names
      • Translate a named address ( www.google.com ) to a numbered IP address (74.125.45.100)
      • All computers on the Internet have a numbered address
    • IP Addresses
      • Every networked computer has a numbered address called an IP Address
      • It works like a home address and allows other computers or servers to send data to your computer
      • Most IP Addresses are in the following format xxx.xxx.xxx.xxx
    • Domain Names
      • When you type a domain name into the address bar, your computer looks up the IP Address that is associated with that name.
      • That information is held in a DNS (Domain Name Server)
      • If the DNS is not working properly, your computer is unable to find the correct IP Address and is not able to go to that web site.
    • Formatting
      • http://www.google.com
      • http is the Internet protocol that determines what your computer should do with the data. In this case, it should get the data through a web browser and display a web page
      • Others are: ftp:// https:// and more
    • http:// www .google.com
      • www tells your computer to find the address on the W orld W ide W eb
      • Sometimes, you can leave off the www and the address will still work (google.com)
    • http://www. google .com
      • The part right before the “.com” is called the root domain
      • In this case, Google is the root domain name
    • http://www.google. com
      • .com determines the type of site that you are visiting, although it’s not always perfectly clear.
      • .com was supposed to be used for businesses or com pany’s on the web
    • .what?
      • .net: was supposed to be for general websites, but is seldom used
      • .org: is used by org anizations like non-profits
      • .edu: is used by edu cational institutions like colleges and schools
      • .gov: is used by the United States Gov ernment
    • Sub Domains
      • Subdomains are used to help keep different parts of a site separate from other parts. They may be different services that a company wants to distinguish between.
      • Example, http:// gmail .google.com , where gmail is Google’s email service, so it has it’s own address.
      • Also note that the “www” is gone
    • What Not To Do
      • Internet Addresses follow simple rules:
        • No spaces in addresses
        • all letters are lowercase
        • periods (.) separate parts of an address
        • only a few special characters are allowed
          • . / - _