Computer Networks: Transport Layer Performance Metrics
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Questions and Answers

What is the maximum number of segments that can be outstanding during the specified duration?

  • 25 segments (correct)
  • 35 segments
  • 30 segments
  • 20 segments

    • What is the maximum link utilization as per the given context?

  • 26 segments (correct)
  • 25 segments
  • 28 segments
  • 27 segments

    • What formula can be used to calculate the window size for a window-based flow control mechanism?

  • w = 2BD - 1
  • w = 2BD + 1 (correct)
  • w = 2BD
  • w = BD

    • What is the effect of the Bandwidth Delay Product on the protocol design choice?

    <p>It helps in deciding the window size (B)</p> Signup and view all the answers

    Considering a link bandwidth of 1Mbps and a delay of 1ms, which protocol would be better for flow control if the segment size is 1 KB?

    <p>TCP (A)</p> Signup and view all the answers

    What is the primary purpose of the Bandwidth Delay Product (BDP) in flow control?

    <p>To determine the optimal segment size for transmission (A)</p> Signup and view all the answers

    Given a bandwidth of 50 Kbps and a one-way transit time of 250 msec, what is the Bandwidth Delay Product (BDP) in segments assuming a segment size of 1000 bits?

    <p>12.5 segments (A)</p> Signup and view all the answers

    What is the round trip time (RTT) for a segment transmission and its corresponding ACK reception?

    <p>The RTT is twice the one-way latency (D)</p> Signup and view all the answers

    Which layer in the network protocol stack is responsible for end-to-end performance?

    <p>Transport Layer (C)</p> Signup and view all the answers

    What is the relationship between the Bandwidth Delay Product (BDP) and the segment size?

    <p>BDP increases as segment size increases (B)</p> Signup and view all the answers

    What is the primary goal of congestion avoidance in a network?

    <p>To regulate the sending rate based on what the network can support (D)</p> Signup and view all the answers

    Which of the following best describes the concept of Max-Min Fairness?

    <p>An allocation is max-min fair if the bandwidth given to one flow cannot be increased without decreasing the bandwidth given to another flow with a lesser allocation (A)</p> Signup and view all the answers

    What is the impact of network congestion on goodput and delay?

    <p>Network congestion decreases goodput and increases delay (C)</p> Signup and view all the answers

    What is the principle behind the Additive Increase Multiplicative Decrease (AIMD) congestion control algorithm?

    <p>The sending rate is increased additively and decreased multiplicatively based on network congestion (B)</p> Signup and view all the answers

    How does a bad congestion control algorithm affect fairness in a network?

    <p>Some flows can get disproportionately smaller share of bandwidth (D)</p> Signup and view all the answers

    What is the main challenge in implementing congestion control in a real network?

    <p>The dynamic nature of network flows (A)</p> Signup and view all the answers

    What is the primary disadvantage of using variable size buffers in the transport layer?

    <p>Complicated implementation (C)</p> Signup and view all the answers

    Which of the following is not an advantage of sliding window protocols in computer networks?

    <p>Less complexity (D)</p> Signup and view all the answers

    What is the Bandwidth-Delay Product (BDP) for a link with bandwidth 1 Mbps and delay of 1 ms?

    <p>1 Kb (A)</p> Signup and view all the answers

    Which of the following is not a function of the Transport Layer?

    <p>Addressing (A)</p> Signup and view all the answers

    What is the primary advantage of using a single large circular buffer for every connection?

    <p>Better memory utilization (D)</p> Signup and view all the answers

    What is the primary purpose of the Max Flow Min Cut Theorem?

    <p>To find the maximum flow in a network (C)</p> Signup and view all the answers

    What is the primary disadvantage of using small buffer sizes in the transport layer?

    <p>Added complexity in implementation (C)</p> Signup and view all the answers

    What is the primary role of the receiver buffer in the transport layer?

    <p>To store data after it is received from the network (C)</p> Signup and view all the answers

    What is the main purpose of dynamic buffer management in the transport layer?

    <p>To adjust buffer allocations based on the rate difference between the transport entity and the application (D)</p> Signup and view all the answers

    What is the primary role of the write() function in the transport layer?

    <p>To block the port until the complete data is written in the transport buffer (D)</p> Signup and view all the answers

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