INTERNET DATABASE

Internet and E-commerce Internet – a worldwide collection of interconnected computer network Internet – a worldwide collection of interconnected computer network E-commerce – customers can place and pay for orders via the business’s web site. E-commerce – customers can place and pay for orders via the business’s web site. Benefits of e-commerce Benefits of e-commerce Worldwide market – buy from anywhere Worldwide market – buy from anywhere Productivity – no wastage of time Productivity – no wastage of time Cost reduction – less time & energy Cost reduction – less time & energy Improved customer services – ease the customer Improved customer services – ease the customer

Internet Services – to send mail and file attachment – to send mail and file attachment Worldwide web – to browse for information stored anywhere and do business transaction Worldwide web – to browse for information stored anywhere and do business transaction File transfer – to download and upload file File transfer – to download and upload file News – to join a news group News – to join a news group Chat room – to join a discussion or chat room Chat room – to join a discussion or chat room

Worldwide web Internet – computers connected using a standard protocol : TCP/IP Internet – computers connected using a standard protocol : TCP/IP Worldwide web – resources stored on the web Worldwide web – resources stored on the web Web browser – software to browse the web Web browser – software to browse the web Web server – software to responds to client’s request Web server – software to responds to client’s request Web page – text written in HTML, static and dynamic Web page – text written in HTML, static and dynamic

Hyperlink – linking the web page Hyperlink – linking the web page Hypertext – refer to different types of documents Hypertext – refer to different types of documents Web site – refer to server and collection of the web pages Web site – refer to server and collection of the web pages http – protocol used by client and server to communicate http – protocol used by client and server to communicate Worldwide web (cont.)

Client Functions Can be extended : Can be extended : Plug-ins – browser can activate automatically when required (extend a system/application) Plug-ins – browser can activate automatically when required (extend a system/application) Active-X – Microsoft’s specification for writing programs that will run inside its browser. Active-X – Microsoft’s specification for writing programs that will run inside its browser. VBScript – Microsoft product based on Visual Basic VBScript – Microsoft product based on Visual Basic JavaScript – Netscape product JavaScript – Netscape product Java – runs on top of a web browser/applets Java – runs on top of a web browser/applets

Query processing from browser (client) to server Query processing from browser (client) to server Browser send a web page request to the server Browser send a web page request to the server Server receive the page request and validate. Then, pass to the middleware Server receive the page request and validate. Then, pass to the middleware Middleware read the script, validate and execute it. Send SQL command to the DBMS, retrieves the info. And send the result back to the middleware Middleware read the script, validate and execute it. Send SQL command to the DBMS, retrieves the info. And send the result back to the middleware Server takes and send the page to the browser Server takes and send the page to the browser Server Functions

Web server interface Web server provide standard interface to communicate with external program Web server provide standard interface to communicate with external program Two common interfaces : Two common interfaces : Application Programming Interface (API) Application Programming Interface (API) Common Gateway Interface (CGI) Common Gateway Interface (CGI)

Internet / Intranet and its Security Internet - a worldwide collection of interconnected computer network Internet - a worldwide collection of interconnected computer network Intranet – an internal corporate network, LAN or WAN Intranet – an internal corporate network, LAN or WAN Benefits of intranet : Benefits of intranet : Ease of use Ease of use Open standard Open standard Platform independence: Runs anywhere Platform independence: Runs anywhere Multiple data source Multiple data source Uniform interface Uniform interface Shorter development time Shorter development time

Firewall – a software / hardware components that limits and control : Firewall – a software / hardware components that limits and control : Data traffic to an organization’s database from the outside world Data traffic to an organization’s database from the outside world Data that are permitted to flow from an organization the outside world. Data that are permitted to flow from an organization the outside world. Internet / Intranet and its Security

END END