CHAP 3 - NETWORK, INTRANET & INTERNET

Network, Intranet & InternetAt the end of the lesson, students should able to:• Define what is Network, Intranet & Internet.• Explain how Network, Intranet & Internet works.• Define what Is Web Browser.•Understand what is World Wide Web.• Explain how Web Browser works and how to find information.• Define and Explain how E-mail Works.• Know how to apply Security & Privacy when surfing.

NetworkCollection of hardware,

interconnected by communication channel that allows us to share resources & information

How Network Works

Computer Network Cable – (RJ45)

Network HubServer

Intranet & How It WorksSecure Connection of computers

using Internet Protocol (IP) to share resources within an Organization.

Resources are shared in a server.User can access within the organization network and cannot be access outside organization network.

Internet

Internet is an interconnected computer networks that use standard Internet Protocol Suite (TCP/IP).

It connects billions of users that consists of academic, business, private or government networks.

How Internet Works

INTRANET

Router-Modem

THE INTERNET

CLIENT SERVER

PC

Modem

MU

LTIP

LE

OF:

MU

LTIP

LE

OF:

WEB SERVER

Broadband

Laptop

I Pad 2

3G Network

OTHER SERVER

World Wide WebSystem of information

distribution using the Internet.Linked document written based

on HTML (Hyper Text Markup Language)

Contains Graphic, Audio, Video, etc.

Navigation Links: allows user interaction with the web.

Data transfer uses HTTP (Hyper Text Transfer Protocol)

Web BrowserApplication software for

retrieving, presenting and surfing information on the internet.

It access the World Wide Web using URL (Uniform Resource Identifier) example : www.yahoo.com.

Example of Web Browser:

Internet ExplorerENTER URL

HERENEW TAB

HOME TOOLS

VIEW FAVOURITES, FEEDS & HISTORY

MENUBAR

FAVOURITES

BAR

SEARCHBOX

Finding Information on the netUsing Search Engine

◦www.google.com◦www.yahoo.com◦www.bing.com

Online Encyclopedia◦www.wikipedia.com

EmailElectronic Mail eg. cikgujohan@yahoo.com

Method of exchanging digital messages from an author to one or more recipients.

Compose, Receive, Forward, Reply, CC & BCC, Delete, Archive, and so on.

Share/attach documents, file, song, picture.

Popular free email provider:◦www.gmail.com◦www.mail.yahoo.com◦www.live.com.my

Security & Privacy while surfingProtect your PC with Updated

Antivirus.Never give out personal

information (username / password) – number etc.

Social Network: Never use your real name / picture.

Never download games/movies/songs from entrusted site.

Always run full computer scan to avoid malware from phishing our data.