1 / 18

Save the World!

Save the World!. What’s appropriate for global networking?. Where do we go from here?. Networking costs money Market payback has driven network infrastructure Without networking, what do you do? Can you take part in the global market? Is networking a right? Who pays?. Pieces of the net.

taline
Télécharger la présentation

Save the World!

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Save the World! What’s appropriate for global networking?

  2. Where do we go from here? • Networking costs money • Market payback has driven network infrastructure • Without networking, what do you do? Can you take part in the global market? • Is networking a right? • Who pays?

  3. Pieces of the net • Connections • Wiring, especially fiber, expensive • Wireless initially more expensive, less overall cost • Routers • Expensive ones make network use efficient • Cheap ones, but not very efficient. QoS!

  4. Bigger pieces • Network backbone: • ATM infrastructure. REALLY expensive! But uses network more efficiently. • IP Gigabit infrastructure. Cheaper, but doesn’t go very far, doesn’t use network efficiently. Wiring expensive. • Dedicated WAN systems: Frame, T1, and more.

  5. What do we want to do? • Applications • E-mail • Browsing a web site • Creating a web site • Video/audio conferencing • Receiving small messages • Sending small messages

  6. E-mail • The usual way - Simple Mail Transfer Protocol (SMTP) over Internet links. • Can be slow links. • Older ways - E-mail via shortwave radio modems, dial-up to dial up networking, other radio systems.

  7. Browsing a web site • The usual way - HTTP via an Internet link • Can be cached - Local (proxy) server stores pages, and passes them on to users. • Synchronization technologies (Avantgo and more) can deliver pages for later browsing. • Wireless web, voice web? Low bandwidth browsing.

  8. Creating a web site • The usual way - editing files online (UNIX) or uploading files to web sites. • More advanced modern ways - XML creation of content. • Can E-mail updated sites, especially if using XML. • Experiments with updating web sites using XML for mountain climbing.

  9. Receiving small messages • Usual way - peer to peer chat clients, cell phones, etc. • Can be VERY low bandwidth • Multiple radio systems can carry the information from a big transmitter to a large region.

  10. Transmitting small messages • Same method: chat clients, cell phones. • Still low bandwidth • Need power at your end to send a signal a long distance.

  11. How to get information around cheap • Low-speed radio networking • high-speed radio networking • Satellite messaging • Satellite network connectivity • By foot!

  12. Low-speed radio • Often used in Amateur Radio • Emergency use • TNC - Terminal network controller • CHEAP! $500. • 1200 bps or 9600 bps. Long range. • Messaging, GPS, other data packets.

  13. Cheap high-speed radios • IEEE 802.11b standard • 11 Mbps over short range. 1 Mbps short. • Can be extended to large range over flat terrain • cheapish: $500-$1,500. • Real Internet

  14. Advanced Radios • Extreme range • High speed (4.5Mbps to 33+ Mbps) • Able to handle yucky topography • More expensive: $3000+ • “Social Intranets”

  15. Satellite solutions • Satellite high-speed Internet: Expensive, but fast. Slow possible. • Satellite phone services - dial up network and SMS. • Satellite messaging - cheap two way SMS-like messages.

  16. By Foot?! • Can place content, deliver content, via CD-ROM/DVD-ROM, etc. • Can update via messaging systems. • Limited, but possible. • Don’t knock it. The government does it!

  17. Hybrid solutions • Direct PC - high speed downlink of data from space. • Uses phone link back • Can use other routes back, like radio networks, maybe even SMS? • Has very high speed “package” delivery. • Small, cheap, easy to use.

  18. What’s best? • Up to you! Go build solutions. • Different situations determine needs • Arctic different from here • Arctic different from Africa, Malaysia. • Different topography, needs, culture • “Society Intranets” can help maintain culture. Internet can impact on culture. • Who pays?

More Related