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ITN Chapter 9 Quiz Online

Last Updated on May 20, 2021 by Admin

ITN Chapter 9 Quiz Online

ITN -- Chapter 9 Quiz

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ITN — Chapter 9 Quiz

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  1. Question 1 of 14
    1. Question
    1 points
    Network congestion has resulted in the source learning of the loss of TCP segments that were sent to the destination. What is one way that the TCP protocol addresses this?
    Correct

    Incorrect

    If the source determines that the TCP segments are either not being acknowledged or are not acknowledged in a timely manner, then it can reduce the number of bytes it sends before receiving an acknowledgment. This does not involve changing the window in the segment header. The source does not decrease the window that is sent in the segment header. The window in the segment header is adjusted by the destination host when it is receiving data faster than it can process it, not when network congestion is encountered.

    Hint

    If the source determines that the TCP segments are either not being acknowledged or are not acknowledged in a timely manner, then it can reduce the number of bytes it sends before receiving an acknowledgment. This does not involve changing the window in the segment header. The source does not decrease the window that is sent in the segment header. The window in the segment header is adjusted by the destination host when it is receiving data faster than it can process it, not when network congestion is encountered.

  2. Question 2 of 14
    2. Question
    1 points
    What is an advantage of UDP over TCP?
    Correct

    Incorrect

    TCP is a more reliable protocol and uses sequence numbers to realign packets that arrive out of order at the destination. Both UDP and TCP use port numbers to identify applications. UDP has less overhead than TCP because the UDP header has fewer bytes and UDP does not confirm the receipt of packets.

    Hint

    TCP is a more reliable protocol and uses sequence numbers to realign packets that arrive out of order at the destination. Both UDP and TCP use port numbers to identify applications. UDP has less overhead than TCP because the UDP header has fewer bytes and UDP does not confirm the receipt of packets.

  3. Question 3 of 14
    3. Question
    1 points
    Which action is performed by a client when establishing communication with a server via the use of UDP at the transport layer?
    Correct

    Incorrect

    Because a session does not have to be established for UDP, the client selects a random source port to begin a connection. The random port number selected is inserted into the source port field of the UDP header.

    Hint

    Because a session does not have to be established for UDP, the client selects a random source port to begin a connection. The random port number selected is inserted into the source port field of the UDP header.

  4. Question 4 of 14
    4. Question
    1 points
    Which number or set of numbers represents a socket?
    Correct

    Incorrect

    A socket is defined by the combination of an IP address and a port number, and uniquely identifies a particular communication.

    Hint

    A socket is defined by the combination of an IP address and a port number, and uniquely identifies a particular communication.

  5. Question 5 of 14
    5. Question
    2 points
    Which two services or protocols use the preferred UDP protocol for fast transmission and low overhead? (Choose two)
    Correct

    Incorrect

    Both DNS and VoIP use UDP to provide low overhead services within a network implementation.​

    Hint

    Both DNS and VoIP use UDP to provide low overhead services within a network implementation.​

  6. Question 6 of 14
    6. Question
    1 points
    Which transport layer feature is used to guarantee session establishment?
    Correct

    Incorrect

    TCP uses the 3-way handshake. UDP does not use this feature. The 3-way handshake ensures there is connectivity between the source and destination devices before transmission occurs.

    Hint

    TCP uses the 3-way handshake. UDP does not use this feature. The 3-way handshake ensures there is connectivity between the source and destination devices before transmission occurs.

  7. Question 7 of 14
    7. Question
    1 points
    What is the purpose of using a source port number in a TCP communication?
    Correct

    Incorrect

    The source port number in a segment header is used to keep track of multiple conversations between devices. It is also used to keep an open entry for the response from the server. The incorrect options are more related to flow control and guaranteed delivery.

    Hint

    The source port number in a segment header is used to keep track of multiple conversations between devices. It is also used to keep an open entry for the response from the server. The incorrect options are more related to flow control and guaranteed delivery.

  8. Question 8 of 14
    8. Question
    1 points

    Refer to the exhibit. What does the value of the window size specify?

    ITN Chapter 9 Quiz Answers 01
    ITN Chapter 9 Quiz Answers 01

    Correct

    Incorrect

    The window size specifies the amount of data that can be sent before an acknowledgment is received from the receiver. This value specifies the highest number of bytes, not the required number of bytes.

    Hint

    The window size specifies the amount of data that can be sent before an acknowledgment is received from the receiver. This value specifies the highest number of bytes, not the required number of bytes.

  9. Question 9 of 14
    9. Question
    1 points
    What is the purpose of the TCP sliding window?
    Correct

    Incorrect

    The TCP sliding window allows a destination device to inform a source to slow down the rate of transmission. To do this, the destination device reduces the value contained in the window field of the segment. It is acknowledgment numbers that are used to specify retransmission from a specific point forward. It is sequence numbers that are used to ensure segments arrive in order. Finally, it is a FIN control bit that is used to end a communication session.

    Hint

    The TCP sliding window allows a destination device to inform a source to slow down the rate of transmission. To do this, the destination device reduces the value contained in the window field of the segment. It is acknowledgment numbers that are used to specify retransmission from a specific point forward. It is sequence numbers that are used to ensure segments arrive in order. Finally, it is a FIN control bit that is used to end a communication session.

  10. Question 10 of 14
    10. Question
    1 points
    What OSI layer is responsible for establishing a temporary communication session between two applications and ensuring that transmitted data can be reassembled in proper sequence?
    Correct

    Incorrect

    The transport layer of the OSI model has several responsibilities. One of the primary responsibilities is to segment data into blocks that can be reassembled in proper sequence at the destination device.

    Hint

    The transport layer of the OSI model has several responsibilities. One of the primary responsibilities is to segment data into blocks that can be reassembled in proper sequence at the destination device.

  11. Question 11 of 14
    11. Question
    3 points
    Which three fields are used in a UDP segment header? (Choose three.)
    Correct

    Incorrect

    A UDP header consists of only the Source Port, Destination Port, Length, and Checksum fields. Sequence Number, Acknowledgment Number, and Window Size are TCP header fields.

    Hint

    A UDP header consists of only the Source Port, Destination Port, Length, and Checksum fields. Sequence Number, Acknowledgment Number, and Window Size are TCP header fields.

  12. Question 12 of 14
    12. Question
    6 points
    A client application needs to terminate a TCP communication session with a server. Place the termination process steps in the order that they will occur. (Not all options are used.)
    Sort elements
    • client sends FIN
    • server sends ACK
    • server sends FIN
    • client sends ACK
    • client sends SYN
    • server sends SYN
    • step 1
      • step 2
        • step 3
          • step 4
            Correct

            Incorrect

            In order to terminate a TCP session, the client sends to the server a segment with the FIN flag set. The server acknowledges the client by sending a segment with the ACK flag set. The server sends a FIN to the client to terminate the server to client session. The client acknowledges the termination by sending a segment with the ACK flag set.

            Hint

            In order to terminate a TCP session, the client sends to the server a segment with the FIN flag set. The server acknowledges the client by sending a segment with the ACK flag set. The server sends a FIN to the client to terminate the server to client session. The client acknowledges the termination by sending a segment with the ACK flag set.

          • Question 13 of 14
            13. Question
            3 points
            What are three responsibilities of the transport layer? (Choose three.)
            Correct

            Incorrect

            The transport layer has several responsibilities. Some of the primary responsibilities include the following:

            • Tracking the individual communication streams between applications on the source and destination hosts
            • Segmenting data at the source and reassembling the data at the destination
            • Identifying the proper application for each communication stream through the use of port numbers
            • Multiplexing the communications of multiple users or applications over a single network
            • Managing the reliability requirements of applications
            Hint

            The transport layer has several responsibilities. Some of the primary responsibilities include the following:

            • Tracking the individual communication streams between applications on the source and destination hosts
            • Segmenting data at the source and reassembling the data at the destination
            • Identifying the proper application for each communication stream through the use of port numbers
            • Multiplexing the communications of multiple users or applications over a single network
            • Managing the reliability requirements of applications
          • Question 14 of 14
            14. Question
            1 points
            What type of applications are best suited for using UDP?
            Correct

            Incorrect

            UDP is not a connection-oriented protocol and does not provide retransmission, sequencing, or flow control mechanisms. It provides basic transport layer functions with a much lower overhead than TCP. Lower overhead makes UDP suitable for applications which are sensitive to delay.

            Hint

            UDP is not a connection-oriented protocol and does not provide retransmission, sequencing, or flow control mechanisms. It provides basic transport layer functions with a much lower overhead than TCP. Lower overhead makes UDP suitable for applications which are sensitive to delay.

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