imagine sitting at your desk at work and using a web browser to view live pictures of every room in...

Imagine sitting at your desk at work and using a Web browser to view live pictures of every room in your house.

You see the plumber or the electrician walking down your driveway. You unlock the front door using a few keystrokes on your office PC.

With a few more keystrokes, you adjust your home's temperature and turn on the lights in one of the bedrooms.

Just then, an e-mail message arrives from your refrigerator. The appliance reminds you that you are out of milk and orange juice and asks you if you want to automatically order more through an online grocer, such as Vons.

Imagine that later that day, you get home and sit in front of the television. The giant screen is divided into four quadrants.

In one quadrant there is a Web browser opened to eBay's home page.

In another quadrant is a feature movie, available on demand, that is being streamed to your television at 10 megabits per second.

In a third part of the screen is a Web camera view of your child's room so you can keep track of what he's currently destroying.

In the fourth panel is the e-mail that has arrived for you today.

Having these capabilities at home may sound like something from a James Bond movie or the Jetsons.

All of these wired features and many more will be available by the end of next year and can be built into a home for less than

the cost of a German luxury car.  

The Internet and the World Wide Web

Chapter 8

7

What is the Internet?

Internet: WORLDS LARGEST NETWORK Made up of small networks hooked together Links millions of computers all over the world

What the Internet is used for1. Browsing/surfing

a. Searching for information

2. Communicatinga. Emailb. Messaging (IM, Text)c. Twitteringd. VoiP - Skypee. Conferencing/NetMeetingsf. Social Networking

3. Shoppinga. Ecommerce b. Auctions

4. Personal Financesa. Bill Payb. Bankingc. Investing

5. Entertainment6. Cloud storage and SaaS

9

Myths About the Internet

Myth 1: The Internet is free Myth 2: Someone controls the

Internet No single group or organization controls

the Internet Governments can regulate Internet use

within its country, but difficult to enforce Myth 3: The Internet and World Wide

Web are identical Internet = physical network WWW = one resource (Web pages)

available via the Internet Other resources are available via the

Internet (email, VoiP, texting, etc..)

10

The Internet Community Today

Users Internet service providers (ISPs): Provide access to the Internet

Internet content providers: Hardware and software companies Government – some countries limit access; FCC influences access Other organizations

Internet Society (ISOC): Addresses issues impacting the future of the internet

Internet Corporation for Assigned Names and Numbers (ICANN): Domain and IP management

World Wide Web Consortium (W3C): Protocols and standards, ensures interoperability

Application service providers (ASPs): Companies that manage and distribute software based services (SaaS)

Infrastructure companies: Own or operate the physical structure of the Internet

The Internet Timeline

Internet 2: a consortium of researchers, educators, and technology leaders from industry, government, and the international community that is dedicated to the development of revolutionary Internet technologies

#1 use of the internet is “Surfing”

using search engine

Search engine is a web site specifically designed to locate Web pages that match specified keywords or selected categories or phrases• Many search sites available (Google, Bing, Yahoo, etc.)

Why do we surf? • Looking for web sites that contain the material you are

seeking

13

Effective Internet searching: A very important skill

Keyword search Keywords are typed in a search box to locate

information on the Internet Matching Web pages are called hits Clicking on a Web page name displays that page

Phrase searching (more than one keyword) Many search sites contain additional tools

Calculators Dictionaries Telephone numbers Weather Time Stock Quotes

14

Evaluating Search Results

Don’t be too quick to click! Evaluate search results:

The first result may be a sponsored ad Check out each link

Does the title and listed description sound appropriate for the information you are seeking?

Is the URL from an appropriate company or organization?

Check The date Many online articles are years old

Verify online information with a second source

Other Issues we are faced with Censorship issues Privacy of Web activities Spyware Adware Email privacy - encryption isn’t enough