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How the Internet Works

How the Internet Works. Course 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.

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How the Internet Works

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  1. How the Internet Works Course 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

  2. How the Internet Works Course 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

  3. How the Internet Works Course 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

  4. How the Internet Works Browsers • 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

  5. How the Internet Works Browsers • 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.

  6. How the Internet Works New 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

  7. How the Internet Works Browser 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

  8. Internet Security ISP Access - Internet Traffic Analysis Firewall NAT 4 Port Switch WiFi PC Software Firewall PC Software Firewall PC Software Firewall

  9. Internet Security - Firewall ISP Access - Internet Traffic Analysis Firewall NAT • 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 4 Port Switch WiFi

  10. Internet Security - Firewall ISP Access - Internet Traffic Analysis Firewall NAT • 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 4 Port Switch WiFi

  11. Internet Security Software Firewall • Initially blocks most in & out traffic • Learns valid traffic by user interaction • Protection for both WAN and LAN traffic ISP Access - Internet Traffic Analysis Firewall NAT 4 Port Switch WiFi PC Software Firewall PC Software Firewall PC Software Firewall

  12. Traffic Analysis Firewall NAT 4 Port Switch WiFi PC Software Firewall Internet Access Software Firewall • Initially blocks most in & out traffic • Learns valid traffic by user interaction • Protection for both WAN and LAN traffic ISP Access - Internet

  13. Traffic Analysis Firewall NAT 4 Port Switch WiFi PC Software Firewall Internet Access Software Firewall • Initially blocks most in & out traffic • Learns valid traffic by user interaction • Protection for both WAN and LAN traffic ISP Access - Internet

  14. 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

  15. Website Contents – Home Page

  16. Web Based Applications

  17. Manage Finances

  18. 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

  19. Share Photos and Documents

  20. Create and Share

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