Introduction 2: Internet, Intranet, and Extranet

Introduction 2:Introduction 2:Internet, Intranet, and ExtranetInternet, Intranet, and Extranet

J394 – Perancangan Situs Web J394 – Perancangan Situs Web

Program Sudi ManajemenProgram Sudi Manajemen

Universitas Bina NusantaraUniversitas Bina Nusantara

BWD.04BWD.04 Bina Nusantara UniversityBina Nusantara University 22

InternetInternet

Internet is:Internet is:– a network of networks of computer a network of networks of computer

hosts hosts – able to seamlessy communicateable to seamlessy communicate– usually through the Internet usually through the Internet

protocol (IP) and Servicesprotocol (IP) and Services


IntranetIntranet

An intranet is:An intranet is:– an exclusive version of internet on an exclusive version of internet on

an organization an organization – which enables people inside the which enables people inside the

organization organization – to share information easilyto share information easily


ExtranetExtranet

An extranet is:An extranet is:– a private network a private network – that uses the Internet Protocol and that uses the Internet Protocol and

the public telecommunication the public telecommunication system system

– to securely share part of a business to securely share part of a business information or operations information or operations

– with suppliers, vendors, partners, with suppliers, vendors, partners, customers or other businessescustomers or other businesses


World Wide Web (1)World Wide Web (1)A system of Internet servers that A system of Internet servers that support specially formatted support specially formatted documents. documents. The documents are formatted in a The documents are formatted in a script called HTML (script called HTML (HyperText Markup HyperText Markup LanguageLanguage) that supports links to ) that supports links to other documents, as well as graphics, other documents, as well as graphics, audio, and video files. audio, and video files.


World Wide Web (2)World Wide Web (2)This means you can jump from one This means you can jump from one document to another simply by document to another simply by clicking on hot spots. clicking on hot spots.

Not all Internet servers are part of Not all Internet servers are part of the World Wide Web.the World Wide Web.


There are several applications called There are several applications called Web browsers that make it easy to Web browsers that make it easy to access the World Wide Web; Two of access the World Wide Web; Two of the most popular being Netscape the most popular being Netscape Navigator and Microsoft's Internet Navigator and Microsoft's Internet Explorer.Explorer.


Web PageWeb Page

Web Page is:Web Page is:– a document on the World Wide a document on the World Wide

Web. Every Web page is identified Web. Every Web page is identified by a unique URL (Uniform Resource by a unique URL (Uniform Resource Locator).Locator).


Home PageHome Page

Home Page is:Home Page is:– The main page of a Web site. The main page of a Web site.

Typically, the home page serves as Typically, the home page serves as an index or table of contents to an index or table of contents to other documents stored at the site.other documents stored at the site.


Web Site (1)Web Site (1)

Web site is:Web site is:– a site (location) on the World Wide a site (location) on the World Wide

Web.Web.


Web Site (2)Web Site (2)Each Web site contains a home page,Each Web site contains a home page,which is the first document users see which is the first document users see when they enter the site. when they enter the site. The site might also contain additional The site might also contain additional documents and files. documents and files. Each site is owned and managed by Each site is owned and managed by an individual, company or an individual, company or organizationorganization


URL (1)URL (1)Abbreviation of Abbreviation of UUniform niform RResource esource LLocator,ocator, the global address of the global address of documents and other resources on documents and other resources on the World Wide Web.the World Wide Web.


URL (2)URL (2)The first part of the address indicates The first part of the address indicates what protocol to use, and the second what protocol to use, and the second part specifies the IP address or the part specifies the IP address or the domain name where the resource is domain name where the resource is located.located.


URL (3)URL (3)For example, the two URLs below For example, the two URLs below point to two different files at the point to two different files at the domain domain binus.ac.id.binus.ac.id. – The first specifies an executable file that The first specifies an executable file that

should be fetched using the FTP protocol; should be fetched using the FTP protocol; – the second specifies a Web page that the second specifies a Web page that

should be fetched using the HTTP should be fetched using the HTTP protocol:protocol:

ftp://www.binus.ac.id/stuff.exeftp://www.binus.ac.id/stuff.exe

http://www.binus.ac.id/index.htmlhttp://www.binus.ac.id/index.html


HTTP (1)HTTP (1)

Short for Short for HHyperyperTText ext TTransfer ransfer PProtocolrotocol, the underlying protocol , the underlying protocol used by the World Wide Web. used by the World Wide Web.


HTTP (2)HTTP (2)HTTP defines how messages are HTTP defines how messages are formatted and transmitted, formatted and transmitted, and what actions Web servers and and what actions Web servers and browsers should take in response to browsers should take in response to various commands. various commands. For example, when you enter a URL in For example, when you enter a URL in your browser, this actually sends an your browser, this actually sends an HTTP command to the Web server HTTP command to the Web server directing it to fetch and transmit the directing it to fetch and transmit the requested Web page.requested Web page.


HTTP (3)HTTP (3)The other main standard that controls The other main standard that controls how the World Wide Web works is how the World Wide Web works is HTML, which covers how Web pages HTML, which covers how Web pages are formatted and displayed.are formatted and displayed.


HTTP (4)HTTP (4)Currently, most Web browsers and Currently, most Web browsers and servers support HTTP 1.1. One of the servers support HTTP 1.1. One of the main features of HTTP 1.1 is that it main features of HTTP 1.1 is that it supports supports persistent connections.persistent connections.

This means that once a browser This means that once a browser connects to a Web server, it can connects to a Web server, it can receive multiple files through the receive multiple files through the same connection. This should improve same connection. This should improve performance by as much as 20%.performance by as much as 20%.

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Introduction 2: Internet, Intranet, and Extranet