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>
<font color="#FF0000">Click here to see my pictures:</font></p>
<p><a href="http://www.mysite.com/photos.html">My photograhps</a></p>
</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:
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??????