Computer Tech Class August 20, 2012.  Internet was originally started by Department of Defense  Was made as means of communication without central location.

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Presentation transcript:

Computer Tech Class August 20, 2012

 Internet was originally started by Department of Defense  Was made as means of communication without central location  First started in 1960s  Not meant for common person

 Research  News  Weather  Shopping  Communication  Business  School

 Definition: a network of millions of computers around the world  It is a network of other networks  Part of the Internet is the World Wide Web

There are several ways to get connected to the Internet:  Dial-Up  DSL  Cable  T1 or T3  Wireless (Satellite)

 Out-dated way of connecting to the Internet  Signal was carried through phone wire  Tied up phone while connected

Digital Subscriber Line  Carries through phone line as well  Uses a higher frequency band  Can be used at the same time as telephone  “Constant” connection

 Signal carried through coaxial cable  You receive the signal through cable company  About the same download speed as DSL

 Direct connection to ISP  Very fast connection & reliable signal  T3 is an upgrade from T1 lines

 Covers a wide variety  Signal can be received directly from satellite  Good for people who cannot receive DSL or cable

 You must have an Internet Service Provider  Who can this be?  Phone company (DSL)  Cable Company (cable connection)  AOL, etc.

 The world wide web (www) is a series of interlinked hypertext documents  What allows us to see the www?  A web browser  Examples: Internet Explorer, Firefox, Safari (Apple), Chrome (Google)  Documents on WWW in HTML (hypertext markup language)

 What is the difference between a webpage and a website?  Webpage: a document connected to the World Wide Web and viewable by anyone connected to the Internet who has a web browser  Website: a collection of “pages” or files linked together and available on the World Wide Web  Who can have a webpage?  Anyone with a computer and a connection to the Internet

 Where did you get the web address from?  Business card  Commercial  Ad from newspaper  Install Web Filtering Software  Dan’s Guardian  Fortiguard  Web browser: certificate cannot be verified  Cooperative Databases: Use Caution  Wikianswers  Answers.com  Yahoo! Answers

 Examples  Facebook  MySpace  Twitter  Pros:  Keep in touch with many people  No travel  Fast  Cons:  Identity Fraud  Can be too Personal

 YouTube  Video sharing website  Can be entertaining, can be harmful  Skype  Software that allows users to make voice calls over the Internet  Can also use text & video  Much cheaper compared to traditional phone calls  Google  Popular search engine  Allows users to search millions of websites using key words  Wikipedia  Online Encyclopedia  Users are the ones to make entries  Information can be questionable

 The use of information and communication technologies to support deliberate, repeated, and hostile behavior be an individual or group, that is intended to harm others  Video Video

1. Tell your parents who you are communicating with and through what sites. 2. Never get too personal with anyone. 3. Do not communicate with anyone you do not know. 4. Report any uncomfortable situations.