Introduction 2:
Internet, Intranet, and Extranet
J394 – Perancangan Situs Web
Program Sudi Manajemen
Universitas Bina Nusantara
Internet
Internet is:
– a network of networks of computer
hosts
– able to seamlessy communicate
– usually through the Internet
protocol (IP) and Services
BWD.04
Bina Nusantara University
2
Intranet
An intranet is:
– an exclusive version of internet on
an organization
– which enables people inside the
organization
– to share information easily
BWD.04
Bina Nusantara University
3
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
BWD.04
Bina Nusantara University
4
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.
BWD.04
Bina Nusantara University
5
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.
BWD.04
Bina Nusantara University
6
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.
BWD.04
Bina Nusantara University
7
Web Page
Web Page is:
– a document on the World Wide
Web. Every Web page is identified
by a unique URL (Uniform Resource
Locator).
BWD.04
Bina Nusantara University
8
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.
BWD.04
Bina Nusantara University
9
Web Site (1)
Web site is:
– a site (location) on the World Wide
Web.
BWD.04
Bina Nusantara University
10
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
BWD.04
Bina Nusantara University
11
URL (1)
Abbreviation of Uniform Resource
Locator, the global address of
documents and other resources on
the World Wide Web.
BWD.04
Bina Nusantara University
12
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.
BWD.04
Bina Nusantara University
13
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
BWD.04
Bina Nusantara University
14
HTTP (1)
Short for HyperText Transfer
Protocol, the underlying protocol
used by the World Wide Web.
BWD.04
Bina Nusantara University
15
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.
BWD.04
Bina Nusantara University
16
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.
BWD.04
Bina Nusantara University
17
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%.
BWD.04
Bina Nusantara University
18