Chapter 2 The Internet and the World Wide Web. 2 Objectives Brief history Internet Access Six Internet Services –Web –Email –Chat (instant messenger)

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Presentation transcript:

Chapter 2 The Internet and the World Wide Web

2 Objectives Brief history Internet Access Six Internet Services –Web – –Chat (instant messenger) –Newsgroup –FTP –Telnet

3 History of Internet 30-year History since 1969 –Pentagon and Cold War Original Use: –Military installations –Universities –Business firms with defense department contracts Initial Goal: –Design a network that maintains the safe transition of data between military computers

4 Events DateEvent 1969ARPAnet ( Advanced Research Projects Agency ) 1984MILNET & ARPANET (Internet) 1980sNational Science Foundation (NSF) controlled Internet Access 1991NSF eased restrictions on Internet Access 1995U.S. government relaxed entry into Internet for the public

5 Internet Service Providers ISPs offer: –Linking consumers and businesses to Internet –Monitoring and maintaining a customer’s Web site –All Internet Services

6 What are Internet Services? Web Chat/Messenger Newsgroup FTP Telnet

7 Web World Wide Web (WWW) –Global hypertext network of millions of Web servers and browsers –Connected by Hypertext Transfer Protocol (HTTP) –Web pages can be designed by Hypertext Markup Language (HTML)

8 Web (Cont’d) Uniform Resource Locator (URL) –E.g. – - protocol designer – - server namewww.towson.edu www means the network is located on a dedicated Web server somewhere Towson.edu is the name of the network edu indicates the site is an educational institution

9 client –A software program loaded in a PC allowing user to access Server protocol: SMTP (Simple Mail Transfer Protocol)

10 Instant Messenger/Chat Industrial Examples (AOL, MSN) Relevance to Internet usages: distinguish Web from Internet

11 Telnet and FTP Telnet –A basic Internet service allowing users to access remote computers File Transfer Protocol (FTP) –A standard protocol allowing users to copy files from computer to computer on Internet

12 Newsgroup (news reader)

13 Exercises What are the 6 types of Internet services? What is the software called that allows users to navigate the Web, a browser or HTTP? True/False? The main network of connections that carry Internet traffic is called the Intranet? Or backbone? True/False? A location on the Web that acts as a launching point for searching and retrieving information is called a portal or homepage.

14 Summary Brief history Internet access Internet services –Web – –Messenger/Chat –FTP –Telnet –Newsgroup

15 Instant Messenger Industrial Examples (AOL, MSN) How to use AIM in classroom? Click herehere