Week 1_intro to internet

transcript

CSC 318 WEB APPLICATION DEVELOPMENT

Week 1 : Introduction to Internet

THE PLAN

INTRODUCTION

What is Internet

HISTORY

ARPANET > INTERNET > WWW

APPLICATIONS

WWW, email, ftp, telnet, newsgroup, mailing list, chatroom, portals

INTRANET

Intranet vs. Internet

HOW TO HOOK UP TO THE INTERNET?

WHAT DOES INTERNET LOOK LIKE?

INTERNET PHYSICAL LAYOUT

BASIC TERM DEFINITION

INTERNET

A combination of networks connected each other

NETWORK

a collection of computers & devices connected together via communication devices & media

THE INTERNET

• world’s largest network

• worldwide collection of networks

Links together millions

businesses

Government offices

Educational institutions

Individuals

WHAT DOES INTERNET PROVIDES?

Internet provides services:

E-mail

Telnet

Newsgroups

Chat rooms

USES OF INTERNET

Access a wealth of info

(news, research & educational material)

conduct business,

(online banking & investment transactions)

entertainment & leisure

shop for goods & services

USES OF INTERNET (CONT)

Social Networking

(fb, chatrooms, twitter)

Access other computers & exchange files

Communication

ORIGIN OF INTERNET?

ARPANET : INTERNET HISTORY

(Advanced Research Projects Agency)

by Pentagon (DoD, USA)

To built a networking projects.

ARPA goals:

Allow scientists at different locations to share info & collaborate on military &

scientific projects.

Could function even if part of the network are disabled or destroyed by a

disaster.

That network, called ARPANET (September 1969)

The Original ARPANET was a WAN

consisted of 4 main computers;

•University of California

•Stanford research Institute

•University of California at Santa Barbara

•University of Utah

1971, ARPANET had been connected to more than 30 universities, defense

departments, governments bodies and other institutions over the US.

By 1984, ARPANET had more than 1000 individual computers

linked as a host.

In 1986, NSF (National Science Foundation) connected its

huge of 5 supercomputers centres called NSFnet, to ARPANET

This configuration of complex networks & hosts became

known as the INTERNET.

1990, commercial companies are allowed to join.

WWW –WORLD WIDE WEB

Exist in early 90’s

Consists of a worldwide collection of documents that

have built-in hyperlinks to other related documents

Allows user to navigate quickly from one document

to another

An electronic doc. on the web is call a web page.

Each web page on a web site has unique address, called Uniform

Resource Locator (URL)

URL consist of:

a protocol (Most begin with http://)

a domain name

(sometimes) the path to specific web page

PROTOCOL

PROTOCOL PURPOSE

http Transferring web pages

ftp Transferring files

telnet Remote login

news Requesting news from a news

mailto Sending e-mail

file Local file access

DOMAIN SUFFIX

SUFFIX USE

com Commercial sites

edu Educational institutions

gov government agencies

net Network organizations

org Non-profit organizations

DOMAIN SUFFIX

SUFFIX COUNTRY

my Malaysia

sg Singapore

ca Canada

au Australia

gb Great Britain

in India

Web Browser : software to access & view web page.

HTML :

Web page is created by using HTML (Hypertext markup language)

Web Server :

stores the web pages that comprise a web site.

Web Master :

individual who responsible for developing & maintaining web site.

E-MAIL

• Electronic Mail

• Transmission of messages & files via a computer network

• E-mail function: create, send, receive, forward, store,

print & delete message.

• E-mail address: combination of a user name

& domain name.

malik.rick@johor.uitm.edu.my

malik.rick@exxonmobil.com

File Transfer Protocol An Internet standard that allows user to exchange files with other computers on the Internet

FTP server – a computer that allows user to upload and download files using FTP FTP sites – a collection of files including text, graphics, audio, video and programs files.

TELNET

Program/command that enables user to connect remote computer on the Internet

To connect – enter a user name and password

Once connected, your computer acts like terminal directly linked to the remote computer

Example – accessing library cataloging.

NEWSGROUP

Online discussions group conducted by user in any particular subjects but in written.

To participate, user sends message to a certain newsgroup, then other users respond by replying to the message.

MAILING LISTS

A collection of e-mail addresses grouped in a single user.

When message is sent to a mailing list, every person in the list receives a copy of message in their mailbox

Example: csc318@yahoogroups.com

CHAT ROOMS

Real-time typed conversation that takes place on a computer.

Must be online at the same time

Chat room – communication medium or channel that permits users to join chatting.

Support text-based & also graphical

PORTALS

•A Web Site but offers a variety of internet services from a single convenient location.

Services are:

Search Engine

Local, national, worldwide news, sports, weather

Reference e.g.. Yellow pages & maps

Shopping malls

E-mail

Chat rooms

INTRANET

INTRA (means internal) & NET (network)

INTRANET

Small version of Internet that used within an organization.

Sometimes called an enterprise network

Use TCP/IP protocols

The Inter-network is a big network of networks.

Week 1_intro to internet

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