modes of connection - wired + wireless

• What are the two modes of connection in computer networks?

  Wired and wireless
• What are the types of wired connections mentioned?

  • Ethernet
  • Fibre optic
  • Twisted pair copper
• What is Ethernet?

  It is a standard for wired networks.
• How has Ethernet evolved?

  It has evolved with network topologies.
• What protocol does a shared backbone cable use?

  CSMA/CD
• What is the purpose of CSMA/CD?

  To listen for communication before transmitting.
• What advantage do twisted pair cables provide?

  Duplex communication is possible.
• What is a key feature of star networks regarding CSMA/CD?

  CSMA/CD is not required.
• What are the characteristics of Ethernet?

  • Standard for wired LAN communication
  • Includes associated protocols
  • Provides reliable, fast communication
  • Data transmitted in frames
• What does a data frame include in Ethernet?

  Preamble, MAC addresses, actual data
• What is the limitation of user location in Ethernet?

  Limited by physical cable connection.
• What is a disadvantage of Ethernet setups?

  They raise costs due to physical hardware.
• Why are wireless connections popular?

  They are portable and avoid cables.
• What is a drawback of wireless connections compared to wired?

  Lower bandwidth and security issues.
• What devices commonly use Wi-Fi?

  Tablets, smart TVs, laptops, phones
• What is Bluetooth ideal for?

  Connecting personal devices.
• What is the range of Bluetooth?

  10 meters
• What is a common use for Bluetooth?

  Connecting wireless headphones to smartphones.
• What is the range of Wi-Fi?

  100 meters
• What are the advantages of Wi-Fi?

  Users can move freely and it's easy to set up.
• What is a disadvantage of Wi-Fi?

  Network speeds are lower than wired networks.
• What does Wi-Fi rely on for performance?

  Signal strength to the wireless access point.
• What can obstruct Wi-Fi signals?

  Objects or building elements.
• How does Bluetooth compare to Wi-Fi in terms of power consumption?

  Bluetooth has lower power consumption.
• What are the steps in data transmission from Computer A to Computer B using Ethernet?

  1. Computer A applies header and CRC.
  2. Checks for other transmissions.
  3. Transmits frame to switch.
  4. Switch checks CRC and header.
  5. Frame sent to next switch.
  6. Computer B performs final CRC check.
• What do wireless networks use to transmit data?

  Electromagnetic radiation.
• How are radio frequencies categorized?

  By frequency and channel.
• What is the range of each Wi-Fi channel?

  Each channel has a range of 22 MHz.
• What happens when devices are on the same Wi-Fi channel?

  They can communicate with each other.
• What is a characteristic of Wi-Fi channels?

  Channel ranges overlap slightly.
• Which channel overlaps with channels 5 and 7?

  Channel 6
• What is the significance of the single channel range in Wi-Fi?

  It indicates potential interference between channels.