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
How the Internet WorksCourse Objectives
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
How the Internet WorksCourse Objectives
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
NAT Traffic AnalysisFirewall
4 Port Switch WiFi
ISP Access - Internet
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
NAT Traffic AnalysisFirewall
4 Port Switch WiFi
ISP Access - Internet
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
NAT Traffic AnalysisFirewall
4 Port Switch WiFi
ISP Access - Internet
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
ISP Access - Internet
NAT Traffic AnalysisFirewall
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
Internet Access
ISP Access - Internet
NAT Traffic AnalysisFirewall
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