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Domain Names

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A brief intro about Internet Domain names

A brief intro about Internet Domain names

Published in: Education, Technology, Business

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Transcript

  • 1. Valid Internet Addresses
  • 2. 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
  • 3. 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
  • 4. 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.
  • 5. 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
  • 6. 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)
  • 7. http://www. google .com
    • The part right before the “.com” is called the root domain
    • In this case, Google is the root domain name
  • 8. 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
  • 9. .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
  • 10. 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
  • 11. 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
        • . / - _