1. Introduction to the Internet and World Wide Web Design

2. Introduction This is simple overview of how Internet and the World Wide Web (WWW) works. This is simple overview of how Internet and the World Wide Web (WWW) works.

3. History of the internet Late 1960s, ARPA (Advanced Research Projects Agency). Supported by Department of Defense. To share informations within one university. Late 1960s, ARPA (Advanced Research Projects Agency). Supported by Department of Defense. To share informations within one university. ARPANET. To connect USA universities and organizations to share info and communicate. TCP Protocol. ARPANET. To connect USA universities and organizations to share info and communicate. TCP Protocol. Internet: To connect organizations all over the world. IP Protocol and other protocols added. Internet: To connect organizations all over the world. IP Protocol and other protocols added.

4. History of the WWW World Wide Web enables user to see multimedia based document. World Wide Web enables user to see multimedia based document. 1993, Mosaic Browser. It leads to Netscape Navigator. 1993, Mosaic Browser. It leads to Netscape Navigator. WWW Consortium(W3C) Objective: To make web accessible regardless of lang. and culture. WWW Consortium(W3C) Objective: To make web accessible regardless of lang. and culture. W3C recommendations and standards. (XHTML, CSS,XML) W3C recommendations and standards. (XHTML, CSS,XML)

5. Web Historical Events C and C++ PLs. C and C++ PLs. Java: Web Programming Lang. (Interactive) Java: Web Programming Lang. (Interactive) JVM: Solved partially Browser Portability Problem. JVM: Solved partially Browser Portability Problem. Java Technology assists in Network Communication. Java Technology assists in Network Communication..NET: Code reusability and multi-lang. applications..NET: Code reusability and multi-lang. applications. Dynamic HTML: Executed on client. Live pages. Dynamic HTML: Executed on client. Live pages. E-Commerce. E-Commerce.

6. Basic concepts Each machine connected to the Internet has a unique IP address and port number. Each machine connected to the Internet has a unique IP address and port number. Using “ping” command we found the following Using “ping” command we found the following –www.google.com 66.102.9.99:80 www.google.com –www.yahoo.com 216.109.118.77:80 www.yahoo.com –www.just.edu.jo 10.242.1.51:80 www.just.edu.jo –webmail.just.edu.jo 10.242.1.52:80 –Your machine is 127.0.0.1 it is unique within itself!

7. Domain Name Server (DNS) DNS match each domain name with its IP address DNS match each domain name with its IP address Domain Name IP address www.google.com 66.102.9.99:80 www.yahoo.com 216.109.118.77:80 www.just.edu.jo 10.242.1.51:80 webmail.just.edu.jo10.242.1.52:80

8. Local DNS (at JUST) National DNS (Amman) Root DNS (USA, Europe, Asia) Total 13 DNS worldwide www.google.com66.102.9.99:80

9. Requesting Information JUST Google HUB 1HUB 3 HUB 4 HUB 7 HUB 2 HUB 5 HUB 8 HUB 6 HUB 9 Routing table JUST DestinationInterface 66.102.9.99:80HUB4 RT H6 Dest.Interf. 66.102.9.99:80google RT H4 Dest.Interf. 66.10 2.9.99 :80 HUB8

10. Returning information JUST Google HUB 1HUB 3 HUB 4 HUB 7 HUB 2 HUB 5 HUB 8 HUB 6 HUB 9 Routing table Google DestinationInterface 10.242.1.51:80HUB3 RT H1 Dest.Interf. 10.242.1.51:80JUST

11. Important Keywords DSL DSL NIC NIC ISP ISP Bandwidth Bandwidth ISDN ISDN Dial Up Connection Dial Up Connection URL URL HTTP HTTP Search Engines Search Engines FTP FTP SMTP SMTP Web Server Web Server Upload Upload