Safe SurfingSafe Surfing

An Introduction to the InternetAn Introduction to the Internet

BOLLI Spring 2008

Lesson 3: OSPs, ISPs, & BrowsersLesson 3: OSPs, ISPs, & Browsers

3/19/20083/19/2008

Where Are We Going Today?Where Are We Going Today?

1. What's in the News1. What's in the News

2. Class Q & A …. YouTube2. Class Q & A …. YouTube

3. Homework Assignment #23. Homework Assignment #2

Email to everyone?Email to everyone?

How many dial-up ISPs?How many dial-up ISPs?

What’s on Wikipedia?What’s on Wikipedia?

4. Getting Connected4. Getting Connected

What is the Internet? <> How did/does it work? <> What is the Internet? <> How did/does it work? <> Hooking up at home <> Service providers <> Web Hooking up at home <> Service providers <> Web Portals <> Hands-on ExercisesPortals <> Hands-on Exercises

5. Time Permitting: Browsers <> Maps5. Time Permitting: Browsers <> Maps

6. Open Q&A6. Open Q&A

What’s In The News?What’s In The News?

• Class:Class:??

• YouTube: YouTube: http://youtube.com/watch?v=1k08yxu57NAhttp://youtube.com/watch?v=-4CV05HyAbM

The

Inte

rnet

E-Mail

WorldWideWeb

Instant Messaging

(I/M)

What is the Internet? What is the Internet?

VOIP (Voice OverInternet Protocol)

Web Cam

TV & Radio

Video

Movies

THE INTERNET

WEBSERVER

WEBSERVER

WEBSERVER

MY COMPUTER

ISP

Dial-Up (Low Speed)

How Did the Internet Work?How Did the Internet Work?

YesterdayYesterday

THE INTERNET

WEBSERVER

WEBSERVER

ISP

MY COMPUTER(Browser and

Email)

ISP(Web Server)

DNS - Domain Name Server

SMTPPOP

SMTP POP

How Does the Internet Work? How Does the Internet Work?

Cable, Satellite, DSL, WiFiCable, Satellite, DSL, WiFi

MY TELEPHONE

TodayToday

Getting Hooked-Up at HomeGetting Hooked-Up at Home

Your HomeYour Home

The Internet

The Internet

Service Providers Service Providers

• OSPs & ISPs (7,000+ in the USA)

• Telecom Giants & Ma & Pa Companies

• Which One?• Content? • Cost?• Speed?• Service Level?• Location?

Web Portals Web Portals

• A gateway to the World Wide WebA gateway to the World Wide Web

• Links to all the information that is important to you on a daily basisLinks to all the information that is important to you on a daily basis

Recent news stories, weather reports and forecasts, stock quotes, Recent news stories, weather reports and forecasts, stock quotes, sport scores sport scores

• An extension of a search engineAn extension of a search engine

• Set your preset startup page to your portalSet your preset startup page to your portal

• Personalize content - Your favorite features in a single pagePersonalize content - Your favorite features in a single page

• Mail, news, weather, stock prices, sports scores, TV, movie listings, Mail, news, weather, stock prices, sports scores, TV, movie listings, and more and more

• Many also feature free-email, chat, and customized news-search tools.Many also feature free-email, chat, and customized news-search tools.

• Get Syndicated! Real Simple Syndication – RSS Get Syndicated! Real Simple Syndication – RSS

– – Real Simple SyndicationReal Simple Syndication

A way to publish frequently updated content including:A way to publish frequently updated content including:

• Blog entries entries

• News headlinesNews headlines

• Podcasts An RSS document contains either a summary of content from an An RSS document contains either a summary of content from an

associated web site or the full text. associated web site or the full text. RSS makes it possible for people to keep up with their favorite web RSS makes it possible for people to keep up with their favorite web

sites in an automated manner that can be piped into special programs sites in an automated manner that can be piped into special programs or filtered displays (Web Portals). or filtered displays (Web Portals).

Subscribe by clicking an RSS icon in a browser that initiates the Subscribe by clicking an RSS icon in a browser that initiates the subscription process. The reader (Web Portal) checks your subscribed subscription process. The reader (Web Portal) checks your subscribed feeds regularly for new content, downloading any updates that it finds.feeds regularly for new content, downloading any updates that it finds.

Location Location LocationLocation Location Location

Sample “The List”Sample “The List”

• Dial upDial up

• BroadbandBroadband

• HostingHosting

• ApplicationsApplications

• ServicesServices

Questions & AnswersQuestions & Answers

• Open Internet Explorer.Open Internet Explorer.

• Go to Google home page.Go to Google home page.

• Select “Tools”, “Internet Options” from the Select “Tools”, “Internet Options” from the Browser menu.Browser menu.

• Select “Use Current”.Select “Use Current”.

• Click “OK”.Click “OK”.

• Go to another Web page and test the home Go to another Web page and test the home page buttonpage button

ExerciseExercise: Reset Browser Home Page: Reset Browser Home Page

ExerciseExercise: Reset Browser Home Page: Reset Browser Home Page

2. Select “Tools”, “Internet Options” from the browser menu

3. Click on “Use Current” and select “OK”

1. Locate the desired new home page in your browser

Exercises – Time PermittingExercises – Time Permitting

Mapshttp://maps.google.com/

Mapquesthttp://www.mapquest.com/

Speed Speed SpeedSpeed Speed Speed

• Dial-up 56KB 56KB

• DSL 128KB – 50MB 128KB – 50MB

• Broadband: DSL 64 – 30 MB

• Broadband: Cable 64KB – 50MB 64KB – 50MB

• Broadband: FiOS 2 MB – 50 MB Broadband: FiOS 2 MB – 50 MB

• Broadband: ISDNBroadband: ISDN

• Wireless, ISDN, & moreWireless, ISDN, & more

Browsing the WebBrowsing the Web

NNavigating (Surfing) the Web

How Does Web Browsing Work?How Does Web Browsing Work?

1. Start your browser program 1. Start your browser program (Internet (Internet Explorer, Firefox, etc.).Explorer, Firefox, etc.).

2. Enter the Web page address (aka “URL”) 2. Enter the Web page address (aka “URL”) www.brandeis.edu/bolli www.brandeis.edu/bolli

• The browser sends a message directly to that The browser sends a message directly to that address requesting a response.address requesting a response.

• The requested response is returned to your The requested response is returned to your computer and is displayed by the browser.computer and is displayed by the browser.

• Using a Domain NameUsing a Domain Name• For Brandeis University, you enter: www.brandeis.eduFor Brandeis University, you enter: www.brandeis.edu• A corresponding Internet IP address is substituted (i.e., 129.64.99.138) by a “Domain A corresponding Internet IP address is substituted (i.e., 129.64.99.138) by a “Domain

Name Server”Name Server”• You could optionally use the IP address to request a pageYou could optionally use the IP address to request a page

• URL (Uniform Resource Locator)URL (Uniform Resource Locator)• Each page within a Web site has its own unique URLEach page within a Web site has its own unique URL• The BOLLI Web pages are part of the Brandeis Web site and our “URL” is: The BOLLI Web pages are part of the Brandeis Web site and our “URL” is:

www.brandeis.edu/bolli/members www.brandeis.edu/bolli/members

• Format RulesFormat Rules• Cannot contain: spaces or special characters except “-”, “_” “/” and “.”Cannot contain: spaces or special characters except “-”, “_” “/” and “.”• Must contain a minimum of three parts separated by a period “.”Must contain a minimum of three parts separated by a period “.”• Last part must be one of following: com, edu, gov, mil, net, us, ca, il, fr, de, ru, etc.Last part must be one of following: com, edu, gov, mil, net, us, ca, il, fr, de, ru, etc.

• Web Address SamplesWeb Address Samples (http:// prefix is optional and implicit) (http:// prefix is optional and implicit)• www.heier.uswww.heier.us• Finance.yahoo.comFinance.yahoo.com• www.irs.gov www.irs.gov • www.knesset.gov.il www.knesset.gov.il

What’s in a Web Address?What’s in a Web Address?

Major Web BrowsersMajor Web Browsers

• Internet Explorer – “IE” (Microsoft Corp.)Internet Explorer – “IE” (Microsoft Corp.)

• Netscape Navigator (Netscape Corp.)Netscape Navigator (Netscape Corp.)

• Firefox (The Mozilla Organization)Firefox (The Mozilla Organization)

• Opera (Opera Software)Opera (Opera Software)

• AOL (America Online)AOL (America Online)

Internet ExplorerInternet Explorer

AOLAOL

And More…And More…

Netscape Firefox

Opera

Major Browser ComponentsMajor Browser Components

Toolbars

Sidebar

Main Window

Important Toolbar FeaturesImportant Toolbar Features

Prev PgNext Pg

Stop

Refresh

Home Pg

FavoritesOn/Off History

On/Off

Email Page

PrintPage

More Toolbar FeaturesMore Toolbar Features

GoogleSearchField Requested

Web Page

StartGoogleSearch

GetRequestedWeb Page

Toolbar Shortcuts

Sidebar PalettesSidebar Palettes

Favorites

History

eBoard & ListserveeBoard & Listserve

eBoard & Listserve http://pc101.eboard.com pc101@lists.brandeis.edu

http://lists.brandeis.edu/wws/info/pc101