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Lecture 5

CP Lecture 5.docx

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Wilfrid Laurier University
Computer Science
Mark Petrick

Lecture 5 Chapter 3 Using the Internet: Making the Most of the Web’s Resources Chapter Topics  The origin of the Internet  The Internet and how it works  Communicating and collaborating through the Internet  Web entertainment  Conducting business over the Internet: E-commerce  Accessing the Web: Web browsers  Getting around the Web: URLs, hyperlinks, and other tools  Searching the Web effectively Internet: network of networks Origin of the Internet  Internet is a network of networks connecting billions of computers globally  Developed while U.S. was in midst of Cold War with Soviet Union  Department of defense (US) making it so that everything is interconnected  Created to respond to two concerns:  Establishing a secure form of military communications  Budget for dept. of defense 2010 $680 billion ( in comparison to the budget of Canada $276 billion)  Creating a means by which all computers could communicate  Open protocols - it is a difficult thing  Evolved from Advanced Research Projects Agency Network (ARPANET)  Vinton Cerf  Robert Kahn Inventors of the internet and worked on protocols  First communication occurred in 1969  World Wide Web is subset of the Internet  Common protocols enable computers to talk to each other  Special links enable navigation The Web vs. the Internet !! The WWW is NOT the INTERNET !! World Wide Web = Web Pages INTERNET = All services (includes: Web, Email, IM, etc…)  The Web is part of the Internet, distinguished by  Common communication protocols  Navigation links  1989: Web invented by Tim Berners-Lee (he created HTML)  1993: Mosaic browser released  1994: Netscape Navigator marked beginning of the Web’s major growth  1997: Internet access was global In the early days The Internet and How It Works  Computer connected to the Internet acts in one of two ways:  Client is computer that asks for data  Server receives the request and returns data to the client Client / Server Network Communicating and Collaborating Through the Internet  Different ways to communicate  Instant messaging  Group communications  Social networking  Web and video logs  Wikis  Podcasts and Webcasts Web 2.0 - application combine functionality of multiple apps, emphasis on sharing and collaboration  Describes evolved type of Web interactions between people, software, and data  Classified as the social Web, in which user is also a participant  Describes trend of new applications  Hundreds of companies exist to help share, recommend, collaborate, create, and socialize Social Networking - common interest, experience and friends  Means by which people use the Internet to communicate and share information  Facebook - 2004, 900 million users - 500 million people check it everyday, youngest self made billionaire, 2007 Microsoft invested 240 million dollars (got 1.6% of the company), upload 300 million photos a day, 3.2 billion likes per day, 7 million 3rd party application, earning 11 billion - company valued at 100 billion dollars, publicly traded company IPO $38 a share  Twitter  LinkedIn - meet professionals through people you know, CEO invested in Facebook $40 000 in 2004, nd sold 22% of their shares they made $35 million  Networking in business community  Finding and filling job positions  LinkedIn is business-oriented network  Marketing and communicating with customers E-Mail  E-mail is primary method of electronic communication worldwide  Written message sent and received over the Internet  Fast  Convenient  More “private” - NOT private , can forward, save, print it out Companies often monitor email to make sure it's business related   Means of exchanging and collaborating on documents via attachments E-Mail Etiquette Guidelines  Be concise and to the point  Use spell-check  Avoid texting abbreviations  Include meaningful subject line  Use emoticons sparingly to convey emotion  Include signature line with basic contact or corporate information Types of E-Mail Accounts  E-mail client  Accessible only from computer on which email client software is installed  Microsoft Outlook  Web-based e-mail client  Accessible from any device that
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