The Internet and the World Wide Web. Una DooneySlide 2Internet and WWW What is the Internet? This is...
-
Upload
craig-asplin -
Category
Documents
-
view
218 -
download
4
Transcript of The Internet and the World Wide Web. Una DooneySlide 2Internet and WWW What is the Internet? This is...
![Page 1: The Internet and the World Wide Web. Una DooneySlide 2Internet and WWW What is the Internet? This is the physical infrastructure or backbone of computers,](https://reader035.fdocuments.us/reader035/viewer/2022062511/5516a336550346f0208b4d34/html5/thumbnails/1.jpg)
The Internet and the The Internet and the World Wide WebWorld Wide Web
The Internet and the The Internet and the World Wide WebWorld Wide Web
![Page 2: The Internet and the World Wide Web. Una DooneySlide 2Internet and WWW What is the Internet? This is the physical infrastructure or backbone of computers,](https://reader035.fdocuments.us/reader035/viewer/2022062511/5516a336550346f0208b4d34/html5/thumbnails/2.jpg)
Una Dooney Slide 2 Internet and WWW
What is the Internet?
• This is the physical infrastructure or backbone of computers, cables, satellites
• It is the collection of networks around the world that are able to communicate with each other
![Page 3: The Internet and the World Wide Web. Una DooneySlide 2Internet and WWW What is the Internet? This is the physical infrastructure or backbone of computers,](https://reader035.fdocuments.us/reader035/viewer/2022062511/5516a336550346f0208b4d34/html5/thumbnails/3.jpg)
Una Dooney Slide 3 Internet and WWW
The Global Communications
NetworkSattelites
Computers
Cables
Servers
Users
ISPs
![Page 4: The Internet and the World Wide Web. Una DooneySlide 2Internet and WWW What is the Internet? This is the physical infrastructure or backbone of computers,](https://reader035.fdocuments.us/reader035/viewer/2022062511/5516a336550346f0208b4d34/html5/thumbnails/4.jpg)
Una Dooney Slide 4 Internet and WWW
The Word Wide Web (WWW)
• The WWW is a system that uses Web Addresses (URL’s) to find resources when a user requests them and deliver the files to the user’s computer for viewing
![Page 5: The Internet and the World Wide Web. Una DooneySlide 2Internet and WWW What is the Internet? This is the physical infrastructure or backbone of computers,](https://reader035.fdocuments.us/reader035/viewer/2022062511/5516a336550346f0208b4d34/html5/thumbnails/5.jpg)
Una Dooney Slide 5 Internet and WWW
Surfing the WWW
![Page 6: The Internet and the World Wide Web. Una DooneySlide 2Internet and WWW What is the Internet? This is the physical infrastructure or backbone of computers,](https://reader035.fdocuments.us/reader035/viewer/2022062511/5516a336550346f0208b4d34/html5/thumbnails/6.jpg)
Una Dooney Slide 6 Internet and WWW
The World Wide Web
• It uses Hypertext and Web Browser software to deliver information– The Hypertext is the links we see in
web pages that allow the user to jump from place to place (site to site)
– The Browser is the software used to explore the internet
![Page 7: The Internet and the World Wide Web. Una DooneySlide 2Internet and WWW What is the Internet? This is the physical infrastructure or backbone of computers,](https://reader035.fdocuments.us/reader035/viewer/2022062511/5516a336550346f0208b4d34/html5/thumbnails/7.jpg)
Una Dooney Slide 7 Internet and WWW
Protocols
• The rules to be followed for communication on the Internet
• Some of these:– http (Hypertext Transfer Protocol)– URL (Uniform Resource Locator)– FTP (File Transfer Protocol)– TCP/IP (Transmission Control
Protocol/Internet Protocol)
![Page 8: The Internet and the World Wide Web. Una DooneySlide 2Internet and WWW What is the Internet? This is the physical infrastructure or backbone of computers,](https://reader035.fdocuments.us/reader035/viewer/2022062511/5516a336550346f0208b4d34/html5/thumbnails/8.jpg)
Una Dooney Slide 8 Internet and WWW
URL
• Uniform Resource Locator (URL or Web Address) is made up of a number of parts or protocols
• First, the HyperText Transfer Protocol (http://)
http://http://www.intel.com/pressroom/index.htm
![Page 9: The Internet and the World Wide Web. Una DooneySlide 2Internet and WWW What is the Internet? This is the physical infrastructure or backbone of computers,](https://reader035.fdocuments.us/reader035/viewer/2022062511/5516a336550346f0208b4d34/html5/thumbnails/9.jpg)
Una Dooney Slide 9 Internet and WWW
HTTP• HTTP (Hypertext Transfer Protocol)
– The is the set of rules for exchanging files on the World Wide Web.
– When activated (by mouse-clicking on a link) your request is sent to a web server
– The server handles your request and transfers you to the new location
http://http://www.intel.com/pressroom/index.htm
![Page 10: The Internet and the World Wide Web. Una DooneySlide 2Internet and WWW What is the Internet? This is the physical infrastructure or backbone of computers,](https://reader035.fdocuments.us/reader035/viewer/2022062511/5516a336550346f0208b4d34/html5/thumbnails/10.jpg)
Una Dooney Slide 10 Internet and WWW
Domain Name
• Second, the domain name, the address of the ISP contacted
• (If it is a commercial site, it ends in .com, .org means nonprofit organization). (http://www.kevinmitnick.com)
http://www.intel.comwww.intel.com/pressroom/index.htm
![Page 11: The Internet and the World Wide Web. Una DooneySlide 2Internet and WWW What is the Internet? This is the physical infrastructure or backbone of computers,](https://reader035.fdocuments.us/reader035/viewer/2022062511/5516a336550346f0208b4d34/html5/thumbnails/11.jpg)
Una Dooney Slide 11 Internet and WWW
Paths/Folders
Third, the paths, folders, and file names of sites and their content loaded by the browser
http://www.intel.com/pressroom/index.htmpressroom/index.htm
![Page 12: The Internet and the World Wide Web. Una DooneySlide 2Internet and WWW What is the Internet? This is the physical infrastructure or backbone of computers,](https://reader035.fdocuments.us/reader035/viewer/2022062511/5516a336550346f0208b4d34/html5/thumbnails/12.jpg)
Una Dooney Slide 12 Internet and WWW
FTP: Downloading Files
• The File Transfer Protocol (FTP) is a part of the Internet protocol suite that is able to transfer computer files between machines with widely different operating systems
• This means putting a copy of the file on your computer’s hard drive
![Page 13: The Internet and the World Wide Web. Una DooneySlide 2Internet and WWW What is the Internet? This is the physical infrastructure or backbone of computers,](https://reader035.fdocuments.us/reader035/viewer/2022062511/5516a336550346f0208b4d34/html5/thumbnails/13.jpg)
Una Dooney Slide 13 Internet and WWW
FTP
•All kinds of files - programs, text, graphics, images and sounds - are available to be copied without restriction for non-profit purposes
•Must pay attention to copyright
![Page 14: The Internet and the World Wide Web. Una DooneySlide 2Internet and WWW What is the Internet? This is the physical infrastructure or backbone of computers,](https://reader035.fdocuments.us/reader035/viewer/2022062511/5516a336550346f0208b4d34/html5/thumbnails/14.jpg)
Una Dooney Slide 14 Internet and WWW
TCP/IP
• TCP/IP: (Transmission Control Protocol / Internet Protocol) is a two-layer protocol
• TCP is the Transport (and top) layer
• IP is the Address layer
![Page 15: The Internet and the World Wide Web. Una DooneySlide 2Internet and WWW What is the Internet? This is the physical infrastructure or backbone of computers,](https://reader035.fdocuments.us/reader035/viewer/2022062511/5516a336550346f0208b4d34/html5/thumbnails/15.jpg)
Una Dooney Slide 15 Internet and WWW
TCP
• The purpose is to provide transparent transfer of data between end users
• It manages the breaking down of a message or file into smaller packets that are transmitted over the Internet
• The packets are received by a TCP layer that reassembles the packets into the original message
![Page 16: The Internet and the World Wide Web. Una DooneySlide 2Internet and WWW What is the Internet? This is the physical infrastructure or backbone of computers,](https://reader035.fdocuments.us/reader035/viewer/2022062511/5516a336550346f0208b4d34/html5/thumbnails/16.jpg)
Una Dooney Slide 16 Internet and WWW
TCP
• Not all packages travel the same route to their destination but are routed in the most efficient way to their destination
![Page 17: The Internet and the World Wide Web. Una DooneySlide 2Internet and WWW What is the Internet? This is the physical infrastructure or backbone of computers,](https://reader035.fdocuments.us/reader035/viewer/2022062511/5516a336550346f0208b4d34/html5/thumbnails/17.jpg)
Una Dooney Slide 17 Internet and WWW
IP
• The Internet Protocol, handles the address part of each packet so that it arrives at the right destination
• Each computer connected to the Internet must have an IP address
(127.255.255.255 )
• Domain Names www.itsligo.ie are matched with IP addresses in order to route data
![Page 18: The Internet and the World Wide Web. Una DooneySlide 2Internet and WWW What is the Internet? This is the physical infrastructure or backbone of computers,](https://reader035.fdocuments.us/reader035/viewer/2022062511/5516a336550346f0208b4d34/html5/thumbnails/18.jpg)
Una Dooney Slide 18 Internet and WWW
People
• Tim Berners-Lee– developed the system of hyper-
linking• Mark Andreesen
– developed the first web browser
![Page 19: The Internet and the World Wide Web. Una DooneySlide 2Internet and WWW What is the Internet? This is the physical infrastructure or backbone of computers,](https://reader035.fdocuments.us/reader035/viewer/2022062511/5516a336550346f0208b4d34/html5/thumbnails/19.jpg)
Una Dooney Slide 19 Internet and WWW
The Internet Success Factors
• The emergence of the Internet is due to four factors:– The universal TCP/IP standard– The web-like ability to link from site to
site– The ease of use provided by the
browser’s graphical interface– The growth of personal computers and
their LANs connected to the Internet
![Page 20: The Internet and the World Wide Web. Una DooneySlide 2Internet and WWW What is the Internet? This is the physical infrastructure or backbone of computers,](https://reader035.fdocuments.us/reader035/viewer/2022062511/5516a336550346f0208b4d34/html5/thumbnails/20.jpg)
Una Dooney Slide 20 Internet and WWW
Today
• Millions of computers worldwide are connected to the Internet
• Millions of dollars/euro spent every day online
• Millions of people do business and communicate on it every day
![Page 21: The Internet and the World Wide Web. Una DooneySlide 2Internet and WWW What is the Internet? This is the physical infrastructure or backbone of computers,](https://reader035.fdocuments.us/reader035/viewer/2022062511/5516a336550346f0208b4d34/html5/thumbnails/21.jpg)
Una Dooney Slide 21 Internet and WWW
Uses of Internet
• E-mail and other forms of communication such as Chat Rooms
• Conferencing/Meetings• E-commerce/Shopping• Research/Education• News in real-time