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DEFINITIONS:
Internet
also called the 'Net' is a
world-wide collection of
interconnected computer
networks that links
millions of business,
government agencies,
educational institutions
and individuals.
World Wide Web
(www)
or simply the 'Web' is a
system of interlinked,
hypertext documents
accessible using the
internet.

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History and Evolution of Internet
1958 — Pentagon's Advance Research Project Agency
(ARPA) was established by the U.S. Department of
Defence to make the U.S. leads in scientific and
technological military operations.
1965 — ARPA sponsored a study on a "cooperative
network of time-sharing computers". Their goal was
to build a network that:
(1) allow scientists at different physical locations to
share information and work together on military and
scientific projects.
(2) that would secure and provide survival to the
information and research from man-made disaster
such as nuclear attack or natural disaster.

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1969 — ARPANET was fully functional, linking scientific
and academic researches across United
1986 — the National Science Foundation connected its
huge network of five supercomputer center to
ARPANET and the NSFnet was bom.
1991
— world wide web introduce to the public by
CERN.
— Yahoo!
1994
— NSFnet terminated its network on the Internet
1995
and resumed its status to research network.

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1997
1998
2004
2005
2006
2010
— Netflix
— Google search engine was launched
— Facebook
- Mozilla Firefox Browser
— Youtube.com
— Twitter
— Social media Pinterest and Instagram
launches.

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Major Components of the Internet:
ADDRESS
(Intemet Protoml)
BROWSER
DNS
(Domain Name Server)
(Intemet Service Provider)

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SÉkVÉkS
A SERVER IS A COMPUTER PROGRAM THAT
PROVIDES A SERVICE TO ANOTHER
COMPUTER PROGRAM AND ITS USER.
TYPES OF SERVERS
Application Server - a program in a computer that
provides the business logic for an application
program.
Web Server — a computer program that
requested HTML or files.

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cont...
Proxy Server — is a software that acts as an
intermediary between an endpoint device, such
as computer and another server from which a
user is requesting.
Mail Server — is an application that receives
incoming e-mail from local users and remote senders
and forward outgoing e-mail for delivery.
File Server — is a computer responsible for central
storage and management of data files so that other
computer on the same network can them.
Policy_Server_— is a security component of a
policy —based network that authorization
and facilitates tracking and control of files.

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IP ADDRESS
IS A NUMERICAL LABEL ASSIGEND TO EACH
DEVICE. THIS PROVIDES IDENTITY TO A
NETWORKED DEVICE .
EXAMPLE OF AN IP ADDRESS
72.14.207.99
( an IP Address usually consist of four groups of
numbers. The number in each group is between O
and 255.)
*the first portion of IP address —NETWORK
**the second portion of IP address — SPECIFIC
DEVICE

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BROWSER
IS AN APPLICATION PROGRAM THAT
PROVIDES A WAY TO LOOK INFORMATION
ON THE WEB.
EXAMPLES OF BROWSER

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DNS (Domain Name System)
IS THE PHONEBOOK OF THE INTERNET. WE
ACCESS INFORMATION ONLINE THROUGH
DOMAIN NAMES.
EXAMPLES OF DNS
www.facebook.com
www.teachingenglish.org.uk
www.depedtambayan.ph
www.academia.edu

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TOP LEVEL DOMAINS
Name
.com
.org
.net
.edu
.gov
.ph
.au
.vc
. kr
Entity
Commercial
Organization
Network
Educational
National and State Government Agencies
Philippines
Australia
Vatican City
South Korea

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ISP (Internet Service Provider)
IS AN ORGANIZATION THAT PROVIDES
SERVICES DOR ACCESSING , USING OR
PARTICIPATING IN THE INTERNET.
TWO TYPES OF ISP's
NATIONAL ISP — provided Internet
access to a specific geographic areas.
REGIONAL ISP — business that
Internet access in cities and
towns nationwide.

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Connecting to the Internet:
Cable Internet Service — provides high-speed Internet
access through the cable television network via cable
modem.
DSL (Digital Subscriber Line) — provides
Internet connection using copper telephone wire.
FTTP (Fiber to the Premises) — uses fiber-optic cable to
provide Internet access to home and business.
A Cellular Radio Network — offers Internet
connection to devices with built-in compatible
Wi-Fi (Wireless Fidelitv) — network uses radio signals to
provide Internet to compatible or
properly wireless computer or device.
Satellite Internet Service — provides high-speed Internet
connections via satellite dish that communicates with a
satellite modem.

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What can I do on the Internet?
Look for Information
School works, jobs and home purposes
Send & Receives Electronic Mail
Video teleconferencing (video call, video chat)
Buy & Sell product
Social Networking
Watch & Posts Videos
Games
Take College Courses
Monitor Home while away
Financial Transactions
Downloads music and movies

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WORLD WIDE WEB
Definition of Terms
The Birth of the Web
Components of the World Wide Web

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What is World Wide Web
O
Commonly known as ' 'www" or triple w (w3)" also
called as "web" .
*Way of exchanging information.
document on the web is called a Web page ,
identified by a unique address called URL[I].
*Uniform Resource Locator (URL) commonly referred
to as a Web address.

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Definition of Terms:
Web Sites — is a collection of web in a
Server that is accessible via Intemet using a Web
address called a URL (uniform resource locator)
URL — the of a web page on the Internet.
Web page — an electronic document on the web.
Web Server — a computer that deliver requested
Web pages to your computer.
Web Browser — an application or software that
allows user to access information on the Web.

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The Birth of the World Wide Web
1980 - Tim Berners-Lee : "ENQUIRE"
- working with the European Organization for
Nuclear Research (CERN), developed a basic hypertext
program called ENQUIRE. The program was designed
to make information readily available to users, and to
allow a user to explore relationships between different
pages.
1990 — Robert Cailliau and Berners-Lee developed the
skeletal outline of the internet, including a web browser
and web server.
1993 — Release of the Mosaic web browser
- which users to explore multimedia
online, also this year; introduction of the first modern
search engines.

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Components of a World Wide Web
Structural Components:
Clients/ Browsers
Servers
Caches
Internet
Semantic Components:
Hyper Text Transfer Protocol (HTTP)
Hyper Text Markup Language (HTML)
Uniform Resource Identifiers (URLs)

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How to access the web?
O
*Follow these steps, Open your web
browser .
*Write the address in the address bar.
*Hit the ENTER key or click on the
GO button.

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Full Structure of a Public URL
Back
Address :
It is the Hypertext
Transfer Protocol
.edu.p
orne. he
The domain
name of web
server on which
page located.
It identifies
the liw•ation of
the
on internet
It identifies
the resource
name.

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Difference Between Internet & WWW
O
Internet
> Internet is a global system of interconnected computer
network.
> Massive network of networks.
>connecting millions of computers.
World Wide Web
> WWW is one of the services that run on intemet.
>VVWW is a system of interlinked hypertext
documents accessed via Internet.
> Simply, Large portion of internet [6].

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