GCSE ICT

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GCSE ICT

• LESSON 12
• Booklet Section 26
• The Internet

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What is the Internet?

• The Internet is a network of networks.
• It gives users access to a wide variety of
  information from millions of different sources.
• It also gives users access to electronic mail
  (email).

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What is the Internet?

• To access the Internet users need
• A computer.
• A modem.
• A telephone line or broadband connection.
• An Internet Service Provider (ISP).

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What is the Internet?

• Once a user is online they can access
  information produced by content providers.
• A content provider can vary from a large company
  that sells its products online to an individual
  who has a single page website.

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Examples of content providers
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The World Wide Web

• Most content providers are part of the World Wide
  Web (www).
• The World Wide Web forms part of the Internet
  where graphics, sound, video, animation, and text
  can be blended together to form a website.

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The World Wide Web

• These are created using hypertext, which allows
  links between the different media to be made as
  well as links between web pages and websites.

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The World Wide Web

• Web pages and websites can be viewed using
  special software called web browsers (e.g.
  Netscape, Internet Explorer).

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The World Wide Web

• Websites are created using html (Hyper Text
  Mark-up Language), although other program
  languages can also be used (e.g. Java and Java
  Script).

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The World Wide Web

• Websites can be found in two different ways
• By typing the websites URL (Universal Resource
  Locator) into a search engine.
• Using the search facility in a search engine.

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The World Wide Web

• Once a website has been found, its location can
  be saved by the browser in Favourites (Internet
  Explorer) or Bookmark (Netscape).

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Examples of search engines
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Electronic mail (email)

• Emails are messages sent via a computer network
  to individuals or groups of individuals.
• Although emails are usually text, users can
  attach files that include graphics, sound, and
  video.
• Email addresses include the _at_ symbol, such as
  ict_at_crownwoods.sch.uk.

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Electronic mail (email)

• Emails can be created online (i.e. whilst
  connected to the Internet ideal for users who
  have broadband Internet connection) or offline
  (i.e. before connecting to the Internet ideal
  for users who have expensive dial-up Internet
  connection).

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Electronic mail (email)
The addressees email address is typed in or
selected from the address book.
The email addresses of people who are to be sent
a copy of the email (Cc carbon copy) are typed
in or selected from the address book.
Subject of the email is then added.
The text of the email is then typed in.
Any attachments (files that are to be sent with
the email) are attached.
The email can then be sent.
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What are the advantages of the Internet as a
source of information?

• It can be accessed from anywhere.
• It provides access to huge amounts of information
  (e.g. encyclopaedias, dictionaries, online
  newspapers, online magazines, online books).

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What are the advantages of the Internet as a
source of information?

• Information can be accessed immediately (e.g.
  finding information in a book may take some
  considerable time).
• The information is up-to-date (unlike books that
  can take months between being written and being
  published).

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What are the advantages of the Internet as a
source of information?

• The information can include multimedia (e.g.
  video clips, animations, sound).
• Search engines can help users find the
  information they need.

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What are the disadvantages of the Internet as a
source of information?

• The hardware and software required to use the
  Internet can be expensive (e.g. buying a computer
  and modem, paying for an Internet Service
  Provider ISP, paying for a dial-up or broadband
  connection).

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What are the disadvantages of the Internet as a
source of information?

• Users must know how to use search engines
  properly in order to access the information they
  actually want.
• Information may not always be accurate or true.

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What are the advantages of emails?

• They can be sent from anywhere in the world to
  anywhere else in the world.
• They cost very little to send, unlike the normal
  post.
• Emails usually arrive at the addressees email
  inbox almost immediately.
• The addressee can read the email at their own
  convenience.

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What are the advantages of emails?

• The addressee can store their emails for as long
  as they like.
• Files (including documents, spreadsheets, images,
  and databases) can be attached to emails.

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What are the disadvantages of emails?

• The hardware and software required to send emails
  can be expensive (e.g. buying a computer and
  modem, paying for an Internet Service Provider
  ISP, paying for a dial-up or broadband
  connection).
• Emails do not always arrive at the correct
  addressees email inbox sometimes emails get
  lost or go to the wrong addressee.

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What are the disadvantages of emails?

• Anyone with access to the addressees email inbox
  can read their emails.
• The addressee might delete important emails by
  mistake, and will then have lost information they
  will need.
• Some email services do not allow attachments or
  strip them off.

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What are the disadvantages of emails?

• Receiving too many emails every day can cause
  information overload business users who try
  to read every email they receive can spend all
  their time doing that and sending answers rather
  than doing their work.

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What are the disadvantages of emails?

• Many emails are unsolicited (i.e. unrequested
  emails advertising services or products that are
  sent to addressees by businesses or individuals)
  these are called junk emails.

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