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Networks Now and Future

Networks Now and Future. From Ethernet to Interplanetary Networks. Basics of networks . Computers can talk to each other when connected together. Can send files, log on, chat, send video, audio, and much more. Can connect in lots of ways.

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Networks Now and Future

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  1. Networks Now and Future From Ethernet to Interplanetary Networks

  2. Basics of networks • Computers can talk to each other when connected together. • Can send files, log on, chat, send video, audio, and much more. • Can connect in lots of ways. • Different networks can be connected together: The Internet.

  3. Traditional wired nets • Some kind of wire connects one machine to another. • Can be copper (normal wire). • Can be fibre optic. • Doesn’t have to be internet: Windows Networking, appletalk, and way more. • Wire can be short, or can go for very long distances. Especially if it’s fibre.

  4. Global networking: TCP/IP and ATM • Internetworking: connecting one network to another to get a “network of networks” • TCP/IP, aka “The Internet”, is based on bouncing “packets” around the world, each one finding its’ own route from one place to another. Rather random, but simple. • ATM, asynchronous transfer mode, based on sending “cells” around the world. Route determined, like a phone line. Better quality.

  5. Routing, nameservers, and all that • The packets need to get somewhere. • Internet has addresses: 192.75.245.6 • ATM has “connections” and addresses. • Routers move Internet packets around from one network to another. • Switches move ATM cells between links. Like telephone switches. • Nameservers let us know an address, tharsis.polylab.sfu.ca, from the number.

  6. Mobile nets, wireless nets • Can transmit digital (ones and zeroes) information via radio waves. • Can bounce those radio waves from place to place via repeaters, like amplifiers. • Can transmit anything, including TCP/IP (Internet) and ATM. • Can connect the radio networks to the Internet. • Can move around, and be on the net

  7. E-commerce • World used to be business via meetings, or via paper. • These days we send everything, including money, via the network. • In Europe, cash is vanishing. Netherlands: folks use smart cards instead of it. • Used to be push-based world: business came looking for you. • Now pull-based: you, the prosumer, go find what you want.

  8. M-commerce • Wireless nets let you be on the net anywhere • E-commerce lets you do business, buy or sell, anywhere on the network. • M-commerce: convergence of the two. • You can access everything you want from wireless connections.

  9. Cellphones, networks everywhere • Cell networks: network of networks, like the internet. • Wireless, can support data. • Wireless web: access to your services from the cellphone. • Will grow into a wide range of digital wireless services and devices available anywhere. • Wireless networks to rule within 2 years.

  10. Wandering around the network • You used to have to physically set up your computer as you moved from one local network to another. • Now you’ll have the Next Generation Internet (IPv6). • Network will follow YOU around, over spacelinks, over radio links, over your home connection. • Always “at home” or “at work”, as you choose.

  11. Using spacecraft to talk • Can’t get wires or radios everywhere. • Can talk to a spacecraft, and bounce the radio signal that way. • Can have one big spacecraft, far away, or lots close up: Iridium, GlobalStar, Teledesic. • Can provide network services for an entire half of the planet. • Can be very cheap. • Even your radio may use a satellite!

  12. Talking on another planet • Wireless technology can be deployed anywhere • Go to another planet, like the Moon or Mars • Put down a wireless network • Put down routers • Put radio gear on the spacecraft, on the spacesuit, on the robots, on the rovers • Martian Internet!

  13. Talking TO another planet • Can send a radio wave from Earth to Mars and back • Can build a network connection on that: just a big wireless net! • Can make it REAL fast using lasers. • Big network delays though. • Who wants to chat with a doctor, customer service agent, SO who takes 40 minutes to answer?

  14. Communicating with remote places • Without a network, you could well be on another planet. • Can use space connections to anywhere in the world. • Who pays for them? • Other, cheaper solutions, but long delays. • Wireless nets cut down the cost. • India: space comms, wireless systems, major engineering expertise. • Canada?

  15. Communicating in emergencies • Need to go somewhere we’ve never gone • Set up a network • Quickly • People could die without it • Sound familiar?

  16. What’s appropriate? • Network needed. • Normal internet good? Do we need fast connections? • If we do, how to we get them? • Can we scale the network, from cellphones to broadband. Voice, maybe?

  17. Project ideas • ASI project proposals! • Need help in community work: Arctic, Africa, Northern BC. • M-commerce surveys. • Wireless web surveys. • YOU name it.

  18. Project ideas? • WAP/WML/Wireless: M-commerce: Rick, Celine, Trinh, Rose, Tamara, Irene, Denise, Alanna, Joni, Chris, Mike, Chirag, Harold • Arctic (ESA): Peter, Cecilia, David, Alanna, Chirag, Julia • Space links: Peter, • East meets west: Shawna, Celine • Wireless/voice: Shawna, Celine, Joni, Eric • Environmental monitoring: David

  19. More ideas • New media growth/alternate media: David • Empower (ESA too), NGO: Chaw, Chirag, Trish, Julia • Dangers: Mike, Chris, Trinh, Chirag, Harold • Global commodity exchange: Trish, Julia • Technology transfer: Eric

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