Dr. Mark Humphrys

School of Computing. Dublin City University.

Home      Blog      Teaching      Research      Contact

My big idea: Ancient Brain


CA114      CA170

CA668      CA669      Projects

Introduction to Networks

1.1 Uses of Networks

Might be easier to list things they can't be used for!
  1. Communication - Email was the 1st killer app of the Internet (1970s-80s)
    1. email
    2. chat, messaging, social networking
    3. VoIP, videophone, Skype
    4. WhatsApp shows all texts migrating to Internet.
    5. Will all audio/video calls migrate to Internet?

  2. Access to info and services - Web was the 2nd killer app (1990s)
    1. text, news, research
    2. images, flickr.com
    3. audio, video, music, streaming radio and TV, youtube.com, IPTV
    4. programs, software archives, Windows Update

  3. Work
    1. Communication - email, messaging, videoconferencing, email mailing lists
    2. Collaboration - write docs in team, Google Docs
    3. Sharing info - stock database, customer database, Intranet (may be international internal network)
    4. Resource sharing - printers, scanners
    5. Universities - tele-learning
    6. Hospitals - tele-medicine
    7. Mobile workers - taxis, fleets, trucks, ships, aircraft, military
    8. B2B - parts from suppliers - Extranet
    9. Job search
    10. Virtual reality - 3D representation of a real city where you can see the real shops, restaurants, etc.

  4. Home
    1. Communication - email, chat, discussion groups, home pages, blogs
    2. Social networking - Facebook, Twitter
    3. Games
    4. The Internet has transformed many industries and human activities:
      1. Music - piracy, pay-to-view, iTunes.
      2. TV and Movies - piracy, pay-to-view, Netflix.
        YouTube gives entirely new environment for TV and Movies - trailers always available, old clips, compilations, parodies (none of these things could exist before).
      3. Dating - New ways to flirt / filter search / chat before meeting.
      4. Gambling - Used to have to go to bookies to gamble. Now you can gamble from home, 24/7/365. (Not all change is good!)
      5. Porn - Used to be inaccessible. Like it or not, technology forced this change on the world. See the failed Communications Decency Act (1996).
      6. Healthy hobbies. e.g. Genealogy - transformed by access to remote databases.
    5. Access to services - bank, tax
    6. B2C - selling online
      1. buying information - subscriptions, music
      2. buying objects by post - amazon
      3. buying tickets - travel, events
      4. research before buy - cars, houses
      5. online auctions
      6. customer support
    7. C2C - ebay
    8. Resource sharing - home network - share broadband Internet access
    9. Home LAN with all devices. e.g. Belkin WeMo.
    10. Family and friends Intranet

  5. How to navigate:
    1. follow links in pages
    2. type in URLs found offline
    3. search - Google, Bing
    4. Top 100 most popular websites in Ireland
    5. Top 500 most popular websites

Nice summary of how the Internet is changing our lives:

ancientbrain.com      w2mind.org      humphrysfamilytree.com

On the Internet since 1987.

Wikipedia: Sometimes I link to Wikipedia. I have written something In defence of Wikipedia. It is often a useful starting point but you cannot trust it. Linking to it is like linking to a Google search. A starting point, not a destination. I automatically highlight in red all links to Wikipedia and Google search and other possibly-unreliable user-generated content.