Structure of the Internet. Internet Structure LAN ISP Internet Backbone.

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Presentation transcript:

Structure of the Internet

Internet Structure LAN ISP Internet Backbone

Addresses Your PC Web Site Domain Name System Domain Name Server

Message Flow

Internet Foundation Your PC Web Site Transmission Control Protocol/ Internet Protocol (TCP/IP)

Client/Server Applications

Client/Server Application Server Client Application Protocol Request Response

Division of Labor in a Client/Server System Server Client Interface Processing Data Management Display Form Validate DataCompute Total Compute Tax Check Inventory Update Inventory

Multi-tiered Client/Server Application Application Server Client Data Management Database Server Interface Processing Data Management

Internet Applications

Internet Applications (i.e., Web Application) Server Client Application Protocol Web Server Web Browser HTTP (Hypertext Transfer Protocol)

Common Internet Application Protocols Server Client Application Protocol HTTP – Web SMTP – FTP – File Transfer IRC – Chat Companies can, and do, create their own application protocols.

Ports Server Client Web Server Web Browser HTTPSMTP Server Client

Web Technologies

Web Browsers and Servers Web Servers Web Browsers Internet Explorer Netscape Mozilla Opera Microsoft IIS Netscape Internet Server Apache

Web Development Options Web Server Web Browser HTML Scripts Executables Scripts SQL

Web Programming Tools Web Server Web Browser Java/JavaScript/JScript Visual Basic/VBScript PERL ASP/JSP C/C++/COBOL/…

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