Internet and IntranetsChapter 11

ByStephen Harris

What is the Internet?

• Made up of many networks.

• What is a network?– Computers that are

connected and can share information.

• schools• homes• organizations• businesses

Types of networks:

• Wide Area Network(WAN)

– Connects computers over a large geographic area, such as a city, county or country.

– Usually found on a much smaller area, such as a college campus.

• Local Area Network(LAN)

– Connects individual computers to one another.

– Could be a network within a lab or a single building.

Example of a LAN

How do I connect to the Internet?

• You will need a modem.– Modem and phone.– Cable modem.

• You will need an Internet Service Provider(ISP)

Connecting to the Internet

What can I do on the Internet?

• Electronic mail.• Bulletin boards• Chatrooms• Audio

communications.• Video

communications.

• Search for information.– Yahoo is a good

subject catalog.

– Altavista is a search engine.

How do I use email?

• Unique ID– each user on the internet has a unique address.– example: ga_harris@yahoo.com

• “ga_harris” is the name.

• “yahoo” is the computer network.

• “com” is the type of organization.

Examples of organization abbreviations?

Commercial Com

Educational Edu

Government (US) Gov

Military (US) Mil

Service networks Net

Nonprofit organizations

org

Examples of organization abbreviations. 1

Communicating on the internet.

• Newsgroups– also called “chat groups” or “conferences”

• Mailing lists– also called “listservs”

World Wide Web

• Commonly called “the Web”

• Not separate from the internet.– “rides” on top of it.

• Information exchanged using protocol.– Hypertext transfer protocol (HTTP)

Web Pages

• Individual pages are grouped together to become a website.

• Accessed by entering the uniform resource locator (URL)– example: www.tamu-commerce.edu

• Hypertext Markup Language (HTML)

Hypertext Markup Language HTML

• Set of formatting commands.

• Requires programs to read.– Examples:

• Internet Explorer

• Netscape

• Software available to create pages.– Example: Microsoft Frontpage

What is an Intranet?

• Internal network for companies or schools.

• Allows remote access via dialing in to network.

• Unwanted users controlled via “firewall.”

CONFIGURATION OF A NETWORK

A S S U R E MODEL

• Analyze Learners

• State Objectives

• Select Methods, Media, and Materials

• Utilize Media and Materials

• Require Learner Participation

• Evaluate and Revise