Introduction To The Internet

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Presentation Transcript

Slide 1: 

Introduction to the Internet

Slide 2: 

Definition Global Connection of Computer Networks

Slide 3: 

Definition It connects… Academic Governmental Commercial Organisational …sites in order to share information.

Slide 4: 

Internet Services Direct Communication Online Conferencing Distributed Information Resources File Transfer Chat E-Mail E-Commerce Newsgroups Mailing-List Discussions WWW FTP

Slide 5: 

History About 30 Years Ago Advanced Research Projects Agency

Slide 6: 

History ARPAnet University of California at Los Angeles University of California at Santa Barbara Stanford Research Institute University of Utah ONLY FOR EXPERTS

Slide 7: 

Evolution

Slide 8: 

Evolution: XWAIS Wide Area Information Service – Pronounced “Ways”

Slide 9: 

Wide Area Information Service – Pronounced “Ways” Very primitive interfaces that let you connect to pre-determined databases of information. Very limited. Evolution: WAIS

Slide 10: 

Wide Area Information Service – Pronounced “Ways” The Windows version of WAIS – More graphical than the predecessors winWAIS Evolution: WAIS

Slide 11: 

Similar to the WAIS. Only a limited list of directories linked to the internet. Developed by the University of Minnesota and named after their sports teams known as the Golden Gophers. Evolution: Gopher

Terminology : 

Terminology Web Server Large amounts of data stored…for access by internet users.

Terminology : 

Web Browser Terminology

Terminology : 

Terminology Home Page

Terminology : 

Terminology Web Page VS Web Site Any Ideas???

Terminology : 

ISP = Internet Service Provider Ex: Onvol, Waldonet, Maltanet, Keyworld, etc etc etc Terminology

Terminology : 

Terminology HTTP = Hypertext Transfer Protocol HTML = Hypertext Mark-up Language

Slide 18: 

HTML: Sample <html> <head> <title>Example</title> </head> <body> <p>&nbsp;</p> <p><font face="Arial"><br> <font color="#FF0000">Click here to see my pictures:</font></p> <p><a href="http://www.mysite.com/photos.html">My photograhps</a></p> </body> </html>

Slide 19: 

URL: Sample Universal Resource Locator Internet Protocol Domain Name File Path http:// www.um.edu.mt/ faculties.html

Slide 20: 

Domains .org .net .com .edu .gov .mt

Hosting : 

After one creates a web-page or site one needs to upload it onto the internet. Example of Free hosting: www.geocities.com www.freeservers.com www.fortunecity.com Otherwise one needs to pay for professional hosting services. ISP’s may offer this service. Hosting

Connecting : 

Connecting PSDN – Normal phone connection – commonly referred to as a Dial-up connection. [needs MODEM] ISDN - (Integrated Services Digital Network) - Digital telephony scheme that allows a user to connect to the Internet over standard phone lines at speeds higher than a 56K modem allows. This usually entails a direct link to a specific site or application.

Connecting : 

ADSL - (Asymmetric Digital Subscriber Line) is a technology for transmitting digital information at high bandwidths on existing phone lines. Unlike regular dialup phone service, ADSL provides a continuously-available connection. ADSL is asymmetric in that it uses most of the channel to transmit downstream to the user and only a small part to receive information from the user. ADSL simultaneously accommodates analog (voice) information on the same line. ADSL is generally offered at downstream data rates from 512 Kbps to about 6 Mbps. Connecting

Connecting : 

Cable Internet - Uses a cable modem designed to operate over cable TV lines. Because the coaxial cable used by cable TV provides much greater bandwidth than telephone lines, a cable modem can be used to achieve extremely fast access to the World Wide Web. Connecting

Slide 25: 

Internet Applications

Slide 26: 

Questions??????