Wired and Wireless Communication

Wired Communication

• Definition: Transfer of data through a cable.
• Types:
  • USB (Universal Serial Bus):
    • Common type of wired connection.
    • Used for multiple purposes.
    • Many revisions to keep up-to-date with technology.
  • Ethernet:
    • Connects devices to a wired network.
    • Can connect laptops to Wi-Fi networks via an Ethernet cable.
    • Quality loss after about 100 meters.

Wireless Communication

• Types:
  • Wi-Fi:
    • Widely available.
    • Connects to a network, often linked to the internet.
  • Bluetooth:
    • Short-distance connectivity.
    • Used for file transfer and audio streaming.
    • Cannot carry as much data as Wi-Fi.
  • 3G and 4G:
    • Mobile broadband for internet access on mobile devices.
    • "G" stands for generation; 5G is the newest, with higher speed and more availability.
  • Infrared Communication:
    • Disadvantages include limited data carrying capacity, requires clear line of sight, and is affected by sunlight.
    • Used for remote controls.
  • Near Field Communication (NFC):
    • Uses radio frequency identification chips.
    • Found in smartphones, travel cards, and some payment cards.

Comparison: Wired vs Wireless Connections

• Wired Communication:
  • Involves the use of cables, generally cheaper.
  • Faster than wireless.
  • Less affected by interference.
  • Not portable beyond 100 meters.
  • Can be untidy and secure.
• Wireless Communication:
  • No need for cables, medium-priced router.
  • No safety risk from cables.
  • Slower than wired.
  • Affected by interference.
  • Portable within a certain range.
  • Tidy, but easier to intercept.