Lecture 1- introduction
- 1. Internet Technology Saman M. Almufti Lecture 1
- 2. Introduction
- 3. What is a network Network main types Network 01 What is internet Internet 02 What is a web browser How dose it works Common web browsers Web Browsers 03
- 4. What is Network Network: Definition: A Computer network is a collection of computers and devices Connected and communicate together via communication devices and transmission media. Communication: Communication describes a process in which two or more computer, devices transfer data, instructions and information
- 5. LAN • local area network MAN • Metropolitan Area Network WAN • Wide Area Network Network Types
- 6. Internet
- 7. Internet is a connection of computer networks using the (TCP/IP) “Transmission Control Protocol/Internet Protocol” Internet connection options vary by Internet Service Provider and by region. Customers should consider some of the following factors before selecting an Internet package: speed or bandwidth, cost, availability, reliability and convenience. Internet What is Internet different types of Internet connections available on the market today. • WIRELESS • MOBILE • DIAL-UP • BROADBAND • DSL • CABLE
- 8. 1969 1977 1979 1983 1984 Network Core Protocol ARPAnet and BBN work to formulate Network Core Protocol 100 host ARPAnet has 100 hosts First Email ARPAnet’s Ray Tomlinson sends the first email message: “Testing 1-2-3” Internet Term “Internet” is coined, TCP/IP becomes the standard protocol DNS Domain Name Servers (DNS) are introduced, the Internet has 1,000 hosts Internet History 1960-70 ARPANET The Advanced Research Projects Agency Network (ARPANET)
- 9. 1990 1990 1990 1990 1991 HTML Tim Berners-Lee develops HTML and the Internet has 300,000 hosts Archie Search Engine the first Search Engine is developed at McGill University first web server Tim Berners-Lee developed the first web server, first web browser Tim Berners-Lee developed first web browser, called Nexus first website The first website in the United States goes live, home to the SLAC National Accelerator Laboratory. Internet History 1990 WWW WWW created in 1989-91 by Tim Berners-Lee
- 10. What is a browser? A browser is software that is used to access the internet. A browser lets you visit websites and do activities within them like login, view multimedia, link from one site to another, visit one page from another, print, send and receive email, among many other activities. Web Browser Common Web browsers
- 11. Web Browsers
- 12. how dose the browser work? When you type a web page address such as www.google.com into your browser, that web page in its entirety is not actually stored on a server ready and waiting to be delivered. In fact each web page that you request is individually created in response to your request. You are actually calling up a list of requests to get content from various resource directories or servers on which the content for that page is stored. The page maybe made up from content from different sources. Images may come from one server, text content from another, scripts such as date scripts from another and ads from another. As soon as you move to another page, the page that you have just viewed disappears. This is the dynamic nature of websites. The information is transferred using the Hypertext Transfer Protocol (HTTP), which defines how text, images and video are transmitted on the web. This information needs to be shared and displayed in a consistent format so that people using any browser, anywhere in the world can see the information. Web Browser. Browser internet
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