Computer Networks Lecture 2: Internet Structure and Data Transmission Methods
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Questions and Answers

What is the average transmission rate offered by the 802.11 (WiFi) protocol in Wireless LANs?

  • 100 Mbps
  • 50 Mbps
  • 1 Gbps
  • 450 Mbps (correct)

    • Which wireless technology is provided by telecommunications companies and offers network coverage within 1-5 km with a speed of 1-10 Mbps?

  • 5G
  • 3G
  • GSM (correct)
  • 4G

    • What type of network coverage is supported by Wireless LANs?

  • 1-5 km
  • Within building (100 ft.) (correct)
  • No specific coverage
  • Global

    • In a wireless network, what does GSM stand for?

    <p>Global System for Mobile communication</p> Signup and view all the answers

    Which physical media is considered when a bit travels through a series of links and routers?

    <p>A combination of different media including wireless, fiber-optic, and copper cables</p> Signup and view all the answers

    What is the average speed offered by wide-area wireless networks using 3G technology?

    <p>10 Mbps</p> Signup and view all the answers

    What is the main difference between guided and unguided physical media?

    <p>Guided physical media signals propagate in solid media, while unguided signals propagate freely through electromagnetic radio waves</p> Signup and view all the answers

    What type of information is carried by the light pulses in fiber optic cables?

    <p>Bits characterized by high-speed operation</p> Signup and view all the answers

    What is the transmission rate of Category 6 twisted pair copper?

    <p>10 Gbps</p> Signup and view all the answers

    Which method of data transfer establishes a dedicated communication path between two devices before data transmission?

    <p>Circuit switching</p> Signup and view all the answers

    What is a characteristic of circuit switching?

    <p>The circuit remains dedicated for the duration of the session</p> Signup and view all the answers

    What is the main disadvantage of electro-magnetic radio waves as a physical media?

    <p>Obstruction by objects</p> Signup and view all the answers

    What does packet switching involve?

    <p>Communication method where data is divided into smaller units called packets</p> Signup and view all the answers

    What is the main difference between Time Division Multiplexing (TDM) and Frequency Division Multiplexing (FDM)?

    <p>$TDM$ involves dividing the channel into time slots, while $FDM$ involves dividing the channel into frequency slots</p> Signup and view all the answers

    $10Gbps$ data transmission is typically associated with which type of twisted pair copper?

    <p>$Category 6$</p> Signup and view all the answers

    $Packet switching$ differs from $circuit switching$ in that:

    <p>$Packet switching$ establishes a dedicated communication path before data transmission, while $circuit switching$ divides data into smaller units called packets</p> Signup and view all the answers

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