Internet histroy
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The document provides a history and overview of the Internet. It discusses: - The origins of the ARPANET network in 1969 and its early connections to universities and defense bases. - The major services enabled by the Internet, including the World Wide Web, email, newsgroups, file transfer, chat, instant messaging, and peer-to-peer file sharing. - How individuals access the Internet through internet service providers using dial-up, DSL, cable or other high-speed connections. - Key technologies that underpin the Internet like hyperlinks, web servers, browsers, and URLs.
Internet histroy
- 1. Internet
- 2. The Internet’s History • 1969 – ARPANET(Advanced Research Projects Agency Network) – Developed by the Department of Defense – Connected universities and defense bases • 1973 – ARPANET connects to Europe 2A-2
- 3. Internet • It is a network, which connects millions of users with millions of hosts. • It is also called network of networks. • It is a source of information and provides many services and facilitates in different working areas. • It has billions of web sites and web pages having knowledge about different topics.
- 4. INTERNET
- 5. The Internet’s Major Services • The World Wide Web (WWW) – Developed in 1993 by Tim-Berners Lee – Allowed connection of documents – Required a browser to read documents • Electronic mail (e-mail) – immediate transmission of documents 2A-5
- 6. The Internet’s Major Services • News – Often called newsgroups – Electronic discussions on several topics • File Transfer Protocol (FTP) – Sends and receives files 2A-6
- 7. The Internet’s Major Services • Chat – Public real time conversation • Instant messaging – Private real time conversation • Peer-to-peer services – Allows sharing of files among users – Napster and Kazaa are examples – Illegal to share copyrighted material
- 8. Accessing The Internet • Internet Service Provider (ISP) – Company that provides Internet access • Dialup – Connects to Internet through phone line – Modem connects to the phone line – Slow connection
- 9. Accessing The Internet • High-speed access – Connect through a special line – 2 – 25 times faster than dialup – DSL, Cable, T1 are common
- 10. Understanding the Internet • The Internet allows accessing resources • The Web simplifies the Internet • The Web connects documents – Hypertext creates links between documents – Documents are stored on a web server – HTTP delivers documents
- 11. Understanding the Internet • Web site is a collection of documents – Document is a web page – Pages are published to the web • Hypertext Markup Language – Creates web pages – Describes how pages should look – Content enclosed in tags – <tag>content</tag>
- 12. Understanding The Internet • Browsers – Read and translate the HTML – Display web content • Uniform Resource Locator (URL) – Address of a web page 2A-12
- 13. Intranet • It is a small internet inside a company or organization (a private Internet). • It uses same technology as of internet standards and operates in the same way. • If intranet is connected to internet or external network to provide or share information then firewall software is used to protect intranet resources from outside access.
- 14. Extranet • It is a network connection that enables external users to access a portion or some parts of an organization internal network, usually via internet connection. • They can access specific parts of internal network but are restricted to access other areas, which are protected by firewalls. • Some organizations have web sites available on the Internet, but with access limited to account holders by password, such facility is also called extranet.
- 15. Cyber Crime • crime committed using a computer and the internet to steal a person's identity or sell illegal imports or follow victims or disturb operations with malevolent programs • E.g. Fraud, Hacking, viruses
Editor's Notes
- #7: Teaching tip Show a typical news group to the students in class. Be sure that you have connected and downloaded all posts before trying the demonstration. Demonstrate the use of ftp to change a web site.
- #8: Discussion point Recently the pop artist Madonna posted several copies of her songs on Kazaa and other file sharing services. Instead of music, she talked at length about copyright infringement through music sharing. In retaliation, hackers hit her website and temporarily made her songs free to purchase. Who is right?
- #11: Teaching tip Find out who has a web presence. If the site is appropriate, display it in class. Have the student discuss what is needed to establish and maintain a web presence.
- #12: Teaching tip Show your students how to access the HTML of an appropriate web site.
- #13: Teaching Tip Dissect the URL provided.