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  • Question
  • What is the purpose of flow control?


  • Options
  • A. To ensure that data is retransmitted if an acknowledgment is not received.
  • B. To reassemble segments in the correct order at the destination device.
  • C. To provide a means for the receiver to govern the amount of data sent by the sender.
  • D. To regulate the size of each segment.

  • Correct Answer
  • To provide a means for the receiver to govern the amount of data sent by the sender. 

    Explanation
    Flow control allows the receiving device to control the transmitter so the receiving device's buffer does not overflow.

  • Internetworking problems


    Search Results


    • 1. When data is encapsulated, which is the correct order?

    • Options
    • A. Data, frame, packet, segment, bit
    • B. Segment, data, packet, frame, bit
    • C. Data, segment, packet, frame, bit
    • D. Data, segment, frame, packet, bit
    • Discuss
    • 2. Which layer 1 devices can be used to enlarge the area covered by a single LAN segment?

      1. Switch
      2. NIC
      3. Hub
      4. Repeater
      5. RJ45 transceiver

    • Options
    • A. 1 only
    • B. 1 and 3
    • C. 3 and 4
    • D. 5 only
    • Discuss
    • 3. A receiving host has failed to receive all of the segments that it should acknowledge. What can the host do to improve the reliability of this communication session?

    • Options
    • A. Send a different source port number.
    • B. Restart the virtual circuit.
    • C. Decrease the sequence number.
    • D. Decrease the window size.
    • Discuss
    • 4. Which of the following describe router functions?

    • Options
    • A. Packet switching
    • B. Packet filtering
    • C. Internetwork communication
    • D. Path selection
    • E. All of the above
    • Discuss
    • 5. Routers operate at layer _____. LAN switches operate at layer _____. Ethernet hubs operate at layer _____. Word processing operates at layer _____.

    • Options
    • A. 3, 3, 1, 7
    • B. 3, 2, 1, none
    • C. 3, 2, 1, 7
    • D. 3, 3, 2, none
    • Discuss
    • 6. How to implement a network medium that is not susceptible to EMI. Which type of cabling should you use?

    • Options
    • A. Thicknet coax
    • B. Thinnet coax
    • C. Category 5 UTP cable
    • D. Fiber-optic cable
    • Discuss
    • 7. What type of RJ45 UTP cable do you use to connect a PC's COM port to a router or switch console port?

    • Options
    • A. Straight-through
    • B. Crossover cable
    • C. Crossover with a CSU/DSU
    • D. Rolled
    • Discuss
    • 8. Why does the data communication industry use the layered OSI reference model?

      1. It divides the network communication process into smaller and simpler components, thus aiding component development, design, and troubleshooting.
      2. It enables equipment from different vendors to use the same electronic components, thus saving research and development funds.
      3. It supports the evolution of multiple competing standards and thus provides business opportunities for equipment manufacturers.
      4. It encourages industry standardization by defining what functions occur at each layer of the model.

    • Options
    • A. 1 only
    • B. 1 and 4
    • C. 2 and 3
    • D. 3 only
    • Discuss
    • 9. Segmentation of a data stream happens at which layer of the OSI model?

    • Options
    • A. Physical
    • B. Data Link
    • C. Network
    • D. Transport
    • Discuss
    • 10. How does a host on an Ethernet LAN know when to transmit after a collision has occurred?

      1. In a CSMA/CD collision domain, multiple stations can successfully transmit data simultaneously.
      2. In a CSMA/CD collision domain, stations must wait until the media is not in use before transmitting.
      3. You can improve the CSMA/CD network by adding more hubs.
      4. After a collision, the station that detected the collision has first priority to resend the lost data.
      5. After a collision, all stations run a random backoff algorithm. When the backoff delay period has expired, all stations have equal priority to transmit data.

    • Options
    • A. 1 and 3
    • B. 2 and 4
    • C. 1,3 and 4
    • D. 2 and 5
    • Discuss


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