Computer Networks Lecture 2: Wireless Networks and Data Transmission Methods
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Questions and Answers

What are the two main categories of wireless networks?

  • Local-area wireless and Wide-area wireless (correct)
  • 3G and 4G
  • WiFi and GSM
  • Wireless LANs and Wired LANs

    • What is the approximate transmission rate offered by the 802.11 (WiFi) protocol for wireless LANs?

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

    • Which technologies are commonly used for wide-area wireless networks?

  • 3G and 4G (correct)
  • 5G and WiFi
  • Bluetooth and Zigbee
  • NFC and RFID

    • What is the typical network coverage range for wide-area wireless or cellular networks?

    <p>1-5 km</p> Signup and view all the answers

    What is the book reference for the Computer Networks lecture?

    <p>Computer Networking: A Top Down Approach, 6th edition, Addison-Wesley, 2012</p> Signup and view all the answers

    What type of network coverage does 802.11 (WiFi) protocol support for wireless LANs?

    <p>Within building (100 ft.)</p> Signup and view all the answers

    Which physical media propagates signals in solid media?

    <p>Coaxial cable</p> Signup and view all the answers

    What is the approximate transmission rate of Category 5 twisted pair copper?

    <p>100 Mbps</p> Signup and view all the answers

    In which method does a dedicated communication path, or circuit, remain established between two devices before data transmission begins?

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

    What is the characteristic of fiber optic cable transmission?

    <p>Carries light pulses, each pulse representing a bit</p> Signup and view all the answers

    What is a disadvantage of electro-magnetic radio waves as a physical medium?

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

    What is a common use of electro-magnetic radio waves?

    <p>Used in wireless LAN (e.g., WiFi)</p> Signup and view all the answers

    What is the primary difference between circuit switching and packet switching?

    <p>Data is divided into smaller units called packets</p> Signup and view all the answers

    What does time division multiplexing (TDM) involve?

    <p>Dividing the transmission medium into separate channels for each user's data stream</p> Signup and view all the answers

    What is a characteristic of guided physical media?

    <p>Signals propagate in solid media</p> Signup and view all the answers

    What is an advantage of circuit switching?

    <p>Commonly used in voice communication</p> Signup and view all the answers

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