Internet and Email

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Internet and E-mail

• Tools for global businesses

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What is the Internet?

• The Internet is a global network made up of
  millions of interconnected computers.
• This information is different from that stored in
  books in two ways.
• First, all of the information is stored,
  transmitted, and received digitally which means
  that it can be accessed in a number of different
  forms including text, video, and audio.
• Second, the Internet is interactive which means
  that the information you receive is a result of
  the selections you make.

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What is the Internet?

• For example, in contacting a news source you
  could be asked to select the type of news you are
  interested in. Imagine you select movie reviews.
  
• After making a selection you would then be shown
  a list of stories within that category.
• Selecting a specific title might then display a
  movie review in text and show a short clip from
  the movie using video and audio.

• Did you know that the word Internet is always
  capitalized in English?

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E-mail
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E-mail

• One widely used feature of the Internet is
  electronic mail, called e-mail, which began in
  1972.
• E-mail allows a person with an e-mail account to
  send messages to another person with an e-mail
  account.
• These messages can be received in seconds, even
  if the recipient is in another country.

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E-mail

• To be able to send and receive e-mail, you must
  have your own unique address and your computer
  must be connected either through a network or a
  modem to the Internet.
• An Internet e-mail address takes the form
• username_at_host.subdomain.domain

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E-mail

• The username refers to the person who has the
  Internet account
• The host refers to the name of the company,
  organization, or educational institution that
  provides the Internet access
• The subdomain and domain refers to the type of
  institution providing the access

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E-mail

• For example
• The address cnorris_at_usask.sk.ca is the Internet
  address for Colleen Norris whose account is
  located at the University of Saskatchewan, an
  educational institution.
• Often an address will contain more than one
  subdomain to make it more specific.
• Since no two people can be assigned the same
  Internet address, each person on a host computer
  must select a different user name.

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Different Types of Domains
IMPORTANT e-mail addresses do not contain
spaces.
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The Web

• The World Wide Web (WWW), also just called the
  Web, came into existence in 1980 when Tim
  Berners-Lee, wrote a program that allowed special
  links between arbitrary computers on the
  Internet.
• With the new program, data could be transmitted
  and received over the Internet in the form of
  text, graphics, and sound from locations called
  sites.
• The Web has now grown to include millions of
  Internet sites.

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Web Browser and URL

• To view the information at a Web site, both a Web
  browser and a Universal Resource Locator (URL)
  are needed.
• A Web browser is software that displays the
  graphics and text of a specified site.
• We use Internet Explorer browser software
• The URL is a special kind of address that tells
  the Web browser what site to go to.
• For example, if we want to access todays news at
  the Canadian Broadcast Corporation (CBC) Web site
  we need to know the address

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Universal Resource Locater (URL)

• http//www.cbc.ca
• The first part of the address, http, is the
  protocol which is used to transfer data over the
  Internet.
• http protocol stands for Hyper Text Transfer
  Protocol
• The two slashes following the colon indicate that
  what follows is an Internet address, in this case
  www.cbc.ca.
• The www indicates that the address is on the
  World Wide Web
• cbc is the host name
• ca is a domain identifier

Note URL addresses do not contain spaces
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Surfing the Web

• Most Web sites are divided into Web pages with
  one page designated as the home page.
• The home page often contains links to other pages
  at that site and can contain links to other Web
  sites.
• These links, called hyperlinks, appear as
  underlined or coloured words or as a special
  graphic on the page.
• Clicking on a hyperlink displays a different Web
  page
• Clicking on hyperlinks to go from Web site to Web
  site is called surfing the Web.

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Surfing the Web

• For example, at the CBC site, clicking on the
  movie reviews hyperlink takes us from the home
  page to a page containing movie reviews.
• From the movie reviews we could click on a
  hyperlink that takes us to the Web site of the
  movie studio producing our selected movie.

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Assignment

• Answer the following questions in a Word
  document
• (1)  What are three common domains that you have
  seen?
• (2)  What does "URL" stand for?
• (3)  What does "http" stand for?
• (4)  What does protocol mean? 
• (5)  What is the difference between a web site
  and a web page?
• (6)  What is the Internet?
• Determine the username, host, subdomain(s), and
  domain of your personal e-mail account(s).
• Answer all questions in complete sentences
• Save your document as Internet questions
• Hand in using the hand-in program