Defeating TCP congestion-control mechanisms usually requires explicit cooperation of the sender. However, consider the receiving end of a large data transfer using a TCP modified to ACK packets that have not yet arrived. It may do this either because not all of the data is necessary or because data that is lost can be recovered in a separate transfer later. What effect does this receiver behavior have on the congestion control properties of the session? Can you devise a way to modify TCP to avoid the possibility of senders being taken advantage of in this manner?

Defeating TCP congestion-control mechanisms usually requires explicit cooperation of the sender. However, consider the receiving end of a large data transfer using a TCP modified to ACK packets that have not yet arrived. It may do this either because not all of the data is necessary or because data that is lost can be recovered in a separate transfer later. What effect does this receiver behavior have on the congestion control properties of the session? Can you devise a way to modify TCP to avoid the possibility of senders being taken advantage of in this manner?

Comptia A+ Core 1 Exam: Guide To Computing Infrastructure (mindtap Course List)

10th Edition

ISBN:9780357108376

Author:Jean Andrews, Joy Dark, Jill West

Publisher:Jean Andrews, Joy Dark, Jill West

Chapter8: Network Infrastructure And Troubleshooting

Section: Chapter Questions

Problem 8TC

See similar textbooks

Similar questions

Below are the two questions, so make sure to answer each part carefully: Why does TCP implement congestion control if it already has flow control to manage the sender's window? Consider our recent reading [Chiu+89] Analysis of the Increase and Decrease algorithms for congestion avoidance in computer networks. How does this article showcases that TCP is fair?
Consider a satellite channel running TCP/IP as shown in the figure below. Due to the long round trip time (RTT) and high bit error rate (BER) the conventional TCP congestion mechanism doesn’t work well in asatellite transmission system. 3.2: Now assume TCP spoofing is implemented in the system. When the TCPsender receives an ACK on behalf of the TCP receiver, does this mean that apacket has been successfully received by the TCP receiver? Explain youranswer in detail.
Why does the maximum packet lifetime have to be large enough to ensure that not only the packet but also its acknowledgments have disappeared? Give one potential disadvantage when Nagle's algorithm is used on a badly congested network. Give two examples of cases where TCP sends data-less packets on an established connection (which is not being torn down).
After a timeout occurrence, we talked about doubling the timeout interval. Congestion control is achieved by the use of this method. Why does TCP require a window-based congestion-control method in addition to the doubling-timeoutinterval strategy?
Below are the two questions, so make sure to answer each part carefully and label the response for each question: 1) Why does TCP implement congestion control if it already has flow control to manage the sender's window? 2) Consider our recent reading [Chiu+89] Analysis of the Increase and Decrease algorithms for congestion avoidance in computer networks. How does this article showcases that TCP is fair?
It is theoretically feasible for two hosts to communicate with one another by sending packets back and forth over the same connection. Please enumerate all of the components that are responsible for the overall amount of time required to process a single packet, starting to end. Is it to be anticipated that one of the delays will continue for a certain amount of time, while the duration of the other delay will be more unpredictable?
TCP requires complete openness from all peers, which means that almost every endpoint OS must support it. Is there a way to trick the Transmission Control Protocol (TCP), and if so, how might one node gain an edge over the rest?
Consider the evolution of TCP’s congestion window shown in the figure below and answer the questions. a. Which version of the TCP is running? Provide an explanation of how you have obtained your answer.b. How many losses have been detected during the first 30 transmission rounds? When are these losses detected? Are these losses due to timeout or triple duplicate ACK? Explain.c. What is the value of ssthresh at transmission round 1 and at transmission round 17? How did you find these numbers? Explain.d. How many segments have been transmitted in the first 4 transmission rounds? Show your work.e. At which transmission round segment 70 has been transmitted? Show your work.
The traceroute programme allows us to transmit datagrams of varying sizes to some destination, X, in order to construct a trace of IP datagrams. Give a quick rundown on how to capture packets during a traceroute execution.
Given the congestion control figure of one side in a TCP communication as below. In which transmission round is the 200th segment sent? Assuming a packet loss is detected in the 26th transmission round due to timeout, what is the value of the ssthresh in the 27th transmission round?
TCP requires complete openness from each and every one of its communicating participants, which encompasses almost every endpoint operating system. Is it feasible to trick the Transmission Control Protocol (TCP), and if so, what are some ways that an individual instance might gain an edge over other endpoints?
The integrity of all parties - essentially all of the endpoint operating systems - is required for TCP to function properly. Is it feasible to cheat in TCP, and if so, how can one instance gain from doing so - in comparison to other endpoints?