COMPUTING TCP'S RTT AND TIMEOUT VALUES Suppose that TCP's current estimated values for the round trip time (estimatedRTT) and deviation in the RTT (DevRTT) are 310 msec and 45 msec, respectively (see Section 3.5.3 for a discussion of these variables). Suppose that the next three measured values of the RTT are 360 msec, 330 msec, and 350 msec respectively. application TCP IP link physical QUESTION 2 OF 9 What is the RTT Deviation for the the first RTT? Answer RTT Compute TCP's new value of DevRTT, estimated RTT, and the TCP timeout value after each of these three measured RTT values is obtained. Use the values of a = 0.125, and ß = 0.25. Round your answers to two decimal places after leading zeros. Internet application TCP IP link physical

COMPUTING TCP'S RTT AND TIMEOUT VALUES Suppose that TCP's current estimated values for the round trip time (estimatedRTT) and deviation in the RTT (DevRTT) are 310 msec and 45 msec, respectively (see Section 3.5.3 for a discussion of these variables). Suppose that the next three measured values of the RTT are 360 msec, 330 msec, and 350 msec respectively. application TCP IP link physical QUESTION 2 OF 9 What is the RTT Deviation for the the first RTT? Answer RTT Compute TCP's new value of DevRTT, estimated RTT, and the TCP timeout value after each of these three measured RTT values is obtained. Use the values of a = 0.125, and ß = 0.25. Round your answers to two decimal places after leading zeros. Internet application TCP IP link physical

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Consider one TCP connection on a path with a bottleneck link with capacity L. We have a file of size F(assume F is a very large file size). If TCP segment size is B bytes, the two-way propagation delay is tp and connection is always in congestion avoidance phase, find the following: A. Maximum window size that TCP can achieve B. Average window size and average throughput in this TCP connection C. Time it will take from connection establishment to reaching the maximum window size.
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DO NOT COPY FROM OTHER WEBSITES. THANK YOU! Assume that a TCP process A first measures the actual round trip time to another TCP process to be 20 ms, and A thus sets its estimated round trip time to be 20 ms. The next actual round trip time that A sees is 40 ms. In response A increases its estimated round trip to 60 ms. The next actual round trip time that A sees is 30 ms. What is the next estimated round trip computed by A? Justify your answer
Consider a TCP connection with the following parameters: a) Initial ssthreshold = 4 segmentsb) Round Trip Time (RTT) = 10 millisecondsc) Timeout period = 40 millisecondsd) Segment size = 3900 bytesThe TCP connection was used to transfer 17 data segments. While sendingthe segments, data segment 7 and data segment 15 were lost the first timethey were sent (but arrived at the receiver properly when retransmitted).There were no other segment losses apart from the aforementioned. Assumethat data segments received out-of-order are buffered at the receiver. Whatis the average throughput obtained in sending all the data segments (inbytes/sec) including draw a diagram to show the communication process in detail.
Consider a TCP connection between Host A and Host B. Suppose that the TCP segments traveling from Host A to Host B have source port number x and destination port number y. What are the source and destination port numbers for the segments traveling from Host B to Host A?
IP datagrams on a specific network can carry a maximum of only 440 bytes in the data portion. A node on this network, running an application using TCP generates a TCP segment with 1,900 bytes in the data portion. How many IP packets are transmitted to carry this TCP segment, and what are their sizes (including the header of 20 bytes)?
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15. Consider the following plot of TCP window size as a function of time (y axis is the congestion window size (segments), and x axis is the transmission round). Assuming that TCP Reno is the protocol experiencing the behavior shown above, answer the following questions. 18 16 14 12 10 00 8 6 4 2 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1) Identify the intervals of time when TCP slow start is operating. 2) After the 5th transmission round, is segment loss detected by a triple duplicate ACK or by a timeout? 3) What is the value of Threshold at the 7th transmission round? 4) What is the value of Threshold at the 15th transmission round?
Suppose that TCP's current estimated values for the round trip time (estimatedRTT) and deviation in the RTT (DevRTT) are 300 msec and 13 msec, respectively. Suppose that the next two measured RTTs are 330 msec and 240 msec respectively. We want to calculate TCP's RTT estimate, and the value of TCP's timeout interval. Note that given a new measured RTT, you should first compute devRTT, then estimatedRTT (the textbook incorrectly reverses those computations), and then (lastly) the timeout interval. Use the values of α = 0.125, β = 0.25.Following the newly measured RTT of 330 msec, what is the new value for devRTT in msec? [Note: round your answer to the nearest msec - enter an integer value, do not include any decimal places/point or any leading zeros, but keep your full resolution value of devRTT handy and use it in any later calculations you perform using devRTT.
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39. The figure below shows the TCP Congestion Window for various transmission rounds of a TCP connection. 20 18 16 14 12 10 4 2 2 4 6 10 12 14 16 18 20 Transmission Round How many more (or less) segments will TCP Tahoe send compared to TCP Reno between the transmission rounds 12 and 16 inclusive (i.e., t12 to t16) for the same sequence of events as shown in the graph above (i.e., loss events at t11, tl4 and t16)? a. TCP Tahoe send 13 less segments compared to TCP Reno b. TCP Tahoe send 20 more segments compared to TCP Reno c. TCP Tahoe send 13 more segments compared to TCP Reno d. TCP Tahoe send 20 less segments compared to TCP Reno e. TCP Tahoe send 28 less segments compared to TCP Reno Congestion Window (MSS) 00
Consider a router that interconnects three subnets: Subnet 1, Subnet 2, and Subnet 3. Suppose all of the interfaces in each of these three subnets are required to have the prefix 223.10.128/24. Also suppose that Subnet 1 is required to support at least 50 interfaces, Subnet 2 is to support at least 100 interfaces, and Subnet 3 is to support at least 12 interfaces. Provide three network addresses (of the form a.b.c.d/x) that satisfy these constraints.