Chapter 2Chapter 2

The Internet

What the Internet Makes PossibleWhat the Internet Makes Possible Today?

• Scientists share expensive equipment online.• Doctors and pilots learn by using computer p y g psimulations.

• iPhones as boarding passesiPhones as boarding passes.

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What Is the Internet?

The physical infrastructure that allows us to dconnect and store content.

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The Infrastructure of the Internet

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Wh t I th W b?What Is the Web?• A system of content that resides on InternetA system of content that resides on Internet servers.

• Web 2 0 involves interaction of users with• Web 2.0 involves interaction of users with content.W b 3 0 (S i W b) i l i i• Web 3.0 (Semantic Web) involves integrating data from various sources in a meaningful way.

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Playing It Safe

• Use care when sharing personal

Playing It Safe

• Use care when sharing personal information online. Y ld ’t h t h• You wouldn’t shout your home address and social security number f Wh ld

Playing It Safe

from a street corner. Why would you post it online for the world to

d?read?

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Terms to know

• Internet

Terms to know

• Internet• Web (World Wide Web or WWW)• web page• web page• website

W b 2 0• Web 2.0• Web 3.0

i b• Semantic Web

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Getting OnlineGetting Online• Types of Internet broadband connectionsTypes of Internet broadband connections

include:DSL– DSL

– CableSatellite– Satellite

• Hardware to connect.• Wired or wireless connections.

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Connecting to the InternetConnecting to the Internet

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Internet Service ProvidersInternet Service Providers

• An Internet Service Provider (ISP) allows youAn Internet Service Provider (ISP) allows you to access the Internet.

• ISPs include phone companies cable and• ISPs include phone companies, cable and satellite companies, and local providers.

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BBrowsers• Used to navigate online content• Used to navigate online content.• Translate content.• Display text, graphics, and multimedia content.• Examples include Mozilla Firefox, Internet p ,

Explorer, Google Chrome, and Safari.

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T t K• Internet Service Provider (ISP)

Terms to KnowInternet Service Provider (ISP)

• browserd l d• download

• upload

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Getting around the InternetGetting around the Internet

• Internet Protocol (IP): series of numbers that• Internet Protocol (IP): series of numbers that uniquely identifies an Internet location.U if R L (URL)• Uniform Resource Locator (URL): text address entered in a browser to go to a website.

• URL is cross-referenced to an IP address.

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Parts of a URLParts of a URL

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Navigating among Web PagesNavigating among Web Pages

• Hyperlinks identify a Web destinationHyperlinks identify a Web destination.• Hyperlinks can be embedded in any graphical object or textobject or text.

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Parts of a Web Pageg

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Ways to Connect OnlineWays to Connect Online• Email to send and receive messages and• Email to send and receive messages and

attached files.V i I P l (V IP) k• Voice-over Internet Protocol (VoIP) to make phone calls over the Internet.

• Web conferencing to hold meetings and collaborate online.

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Playing It SafePlaying It Safe

• Email can deliver viruses to your computer.

• Phishing involves email that delivers financial scams.

Playing It Safe

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Terms to KnowTerms to Know• email

Terms to KnowTerms to Know

• email program• email client

il dd• email address• Voice-over Internet Protocol (VoIP)• Web conferencing• Web conferencing• Multipurpose Internet Mail Extensions

(MIME) format( )• Simple Mail Transfer Protocol (SMTP)• Internet Message Access Protocol (IMAP)g• Post Office Protocol, Version 3 (POP3)

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