Introduction 2: Internet, Intranet, and Extranet J394 – Perancangan Situs Web

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Introduction 2:

Internet, Intranet, and Extranet

J394 – Perancangan Situs Web

Program Sudi Manajemen

Universitas Bina Nusantara

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Internet

Internet is:

a network of networks of computer hosts

able to seamlessy communicate

usually through the Internet protocol (IP) and Services

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Intranet

An intranet is:

an exclusive version of internet on an organization

which enables people inside the organization

to share information easily

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Extranet

An extranet is:

a private network

that uses the Internet Protocol and the public telecommunication system

to securely share part of a business information or operations

with suppliers, vendors, partners, customers or other businesses

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World Wide Web (1)

A system of Internet servers that support specially formatted documents.

The documents are formatted in a script called HTML (HyperText Markup

Language) that supports links to other documents, as well as graphics, audio, and video files.

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World Wide Web (2)

This means you can jump from one document to another simply by clicking on hot spots.

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

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There are several applications called

Web browsers that make it easy to access the World Wide Web; Two of the most popular being Netscape

Navigator and Microsoft's Internet

Explorer.

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Web Page

Web Page is:

a document on the World Wide

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

Locator).

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Home Page

Home Page is:

The main page of a Web site.

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

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Web Site (1)

Web site is:

a site (location) on the World Wide

Web.

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Web Site (2)

Each Web site contains a home page, which is the first document users see when they enter the site.

The site might also contain additional documents and files.

Each site is owned and managed by an individual, company or organization

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URL (1)

Abbreviation of Uniform Resource

Locator, the global address of documents and other resources on the World Wide Web.

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URL (2)

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

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URL (3)

For example, the two URLs below point to two different files at the domain binus.ac.id.

The first specifies an executable file that should be fetched using the FTP protocol;

the second specifies a Web page that should be fetched using the HTTP protocol: ftp://www.binus.ac.id/stuff.exe

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

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HTTP (1)

Short for HyperText Transfer

Protocol, the underlying protocol used by the World Wide Web.

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HTTP (2)

HTTP defines how messages are formatted and transmitted, and what actions Web servers and browsers should take in response to various commands.

For example, when you enter a URL in your browser, this actually sends an

HTTP command to the Web server directing it to fetch and transmit the requested Web page.

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HTTP (3)

The other main standard that controls how the World Wide Web works is

HTML, which covers how Web pages are formatted and displayed.

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HTTP (4)

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

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

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