How the Internet Works Course Objectives Introduce the various web browsers Introduce some new terms...

How the Internet WorksCourse Objectives

Introduce the various web browsers Introduce some new terms Explain the basic Internet to PC hookup

ISP Wired Ethernet (10baseT) WiFi Modem and Router

Explore the basic components that makeup the Internet Hardware Software Protocol


Describe how an Internet connection is made Human address format to Internet format HTTP HTTPS FTP BitTorrent

Review Internet Security Within your router PC Firewall WiFi password Encrypted connection


Explore the many Web Based Applications Web Mail Calendars Office application workspace with sharing VoIP Hulu and Google TV Desktop Sharing File storage and backup

Be Careful when you Download Scams and extra non-productive software Explore DNS spoofing and key stroke capture

How the Internet WorksBrowsers

Are Applications Provide a GUI to the user Interpret HTML (hypertext Markup Language) Execute Javascript Controls your session with the server (cookies) Stores pages for fast return (cache) Ensures Security Provide Navigation from one website to another

How the Internet WorksBrowsers

Provides programs (Add-on or Extensions) within the browser Flash Player Other video players Sound Animation Video capture Download control of useful programs

Originally developed for the Internet or WWW Can also be used to run programs strictly on the

PC Converts human language and actions into Internet

code, protocols and direction.

How the Internet WorksNew Terms

URL (address) Domain Name Search Engine Crawler, Web Crawler, Web Spiders, Robots Home (page) Reload refresh Back button Forward button Stop button Bookmarks History Add-ons or Extensions

How the Internet WorksBrowser Functions

The Browser is a web navigator Navigates by following links Links on its own website - internal links Referred links to other websites Link location is displayed on Status bar

Converts HTML to a graphical display Styles display by website style sheets Provides enhanced interaction with Javascript/Jquery Add-ons or Extensions for more browser functionality Displays non-HTML content Enforces security and encryption

Internet Security

NAT Traffic AnalysisFirewall

4 Port Switch WiFi

ISP Access - Internet

PC

Software Firewall

PC

Software Firewall

PC

Software Firewall

Internet Security - Firewall


4 Port Switch WiFi


Network Access Table: Records outgoing Internet traffic initiated by LAN connected device. Allows returned Internet responses Denies any unsolicited traffic from the Internet Does not control or restrict LAN traffic

Internet Security - Firewall


4 Port Switch WiFi


Router Firewall: Uses the router manufacturer's rules based protocol Analysis the actual traffic to try and determine if valid or not Denies most unsolicited traffic from the Internet - can deny desired traffic Does not control or restrict LAN traffic

Internet Security


4 Port Switch WiFi


PC

Software Firewall

PC

Software Firewall

PC

Software Firewall

Software Firewall

Initially blocks most in & out traffic

Learns valid traffic by user interaction

Protection for both WAN and LAN traffic

Internet Access



4 Port Switch WiFi

PC

Software Firewall

Software Firewall

Initially blocks most in & out traffic

Learns valid traffic by user interaction

Protection for both WAN and LAN traffic

Password Security

Don't use the same password for all sites. Especially financial sites. Use a password protection program or website. The browser's offer to remember password –

bad. The program must encrypt its contents. On-line password protection: LastPass &

RoboForm Computer based: KeePass & RoboForm

Website Contents – Home Page

Web Based Applications

Manage Finances

Online Banking

Automatically receive bills

Setup alerts and reminders

Setup automatic and reoccurring payments

Track expenses by category

No need to reconcile checks

Instant access to current balance

Share Photos and Documents

Create and Share

How the Internet Works Course Objectives Introduce the various web browsers Introduce some new terms...

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