3m/n World wide communication + Implications

Data connections
1. Cellular Network
  1. GSM network allowing calls and texts or 3G/4G connections, allowing data to be transferred
  2. Bluetooth, USB or Wi-Fi can be used to connect mobile to laptops or tablets
  3. X- Cost increases for foreign calls
  4. O- Good for safety
2. WiFi
  1. Hotspots enables any WiFi enabled device to use the data connection
  2. Hotspot is connected to a network of some kind
    1. E.g LAN connected to internet through router
    2. Mobile device connected to cellular network
3. Satellite data link
  1. WiFi Hotspot or LAN connected to a satellite data link
  2. Used in remote places
  3. X- Limited Wi-FI, limits functunality
  4. X- Expensive phone and credit
  5. O- Very Secure
  6. O- Good for emergencies
Mobile Phones
1. Can use apps or www for communication
2. Cellular Network
  1. Phone calls
  2. Text messaging
3. 3G/4G or Wi-Fi
  1. Email
  2. Video conferencing
  3. Discussion forums
  4. Social networking
Satellite phone
1. O- Can be used anywhere in the world
2. X- Battery life limited to 4 hour talk time (30 hour standby)
3. Phone calls, text messaging, pager messaging
4. Can create Hotspot
  1. X- Bandwidth limited to 38Kbps
Tablet/ Laptop with 3/4G
1. Most have 3G/4G built in
  1. Others can use dongle in USB port or Wi-Fi
    1. Hotspot can be created by mobile/satellite phone or LAN
      1. X- Can slow down both devices
      2. X- If unprotected, others can use Wi-Fi and use up phone data.
2. Device can communicate using applications e.g. www, email
Nomadic networks
1. A network of portable devices to access the internet and extranets

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3m/n World wide communication + Implications

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	Criado por Gladys Mba quase 8 anos atrás