Phases of TCP congestion control. Consider the figure below, which plots the evolution of TCP's congestionwindow at the beginning of each time unit (where the unit of time is equal to the RTT); see Figure 3.53 in thetext. In the abstract model for this problem, TCP sends a "flight" of packets of size cwnd at the beginning of eachtime unit. The result of sending that flight of packets is that either (i) all packets are ACKed at the end of the timeunit, (ii) there is a timeout for the first packet, or (iii) there is a triple duplicate ACK for the first packet.Congestion window size (in segments)4035302520151050www10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40Time unit (in RTT)A. During which of the following intervals of time is TCP performing slow start*?B. During which of the following intervals of time is TCP performing congestion avoidance*?C.At the end of which units of time does TCP detect a triple-duplicate-ACK*?D. At the end of which unit(s) of time does TCP detect a loss via timeout*?

The question is asking to identify the intervals of time during which TCP is performing slow start,…

A. During which of the following intervals of time is TCP performing slow start"? B. During which of the following intervals of time is TCP performing congestion avoidance*? C. At the end of which units of time does TCP detect a triple-duplicate-ACK*? D. At the end of which unit(s) of time does TCP detect a loss via timeout"?

A. During which of the following intervals of time is TCP performing slow start"? B. During which of the following intervals of time is TCP performing congestion avoidance? C. At the end of which units of time does TCP detect a triple-duplicate-ACK? D. At the end of which unit(s) of time does TCP detect a loss via timeout"?

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

See similar textbooks

Related questions

Q: Consider the following plot below of TCP window size as a function of time. Assuming TCP Reno is the…

A: Given The TCP Flow mechanism: This graph contains TCP window size with respect to congestion…

Q: True or false? Suppose that the last SampleRTT in a TCP connection is equal to 1 sec. The current…

A: SampleRTT in TCP connection TCP is a connection oriented protocol and every connection oriented…

Q: When does TCP slow start*? When does TCP prevent congestion? When does TCP notice a loss through…

A: Sure! TCP (Transmission Control Protocol) is a crucial protocol that underlies much of the…

Q: To what extent is this true? Suppose a TCP connection's most recent SampleRTT was 1 second. The…

A: Your answer is given below.

Q: Does this make sense to you, or do you believe it to be incorrect? Consider the most recent…

A: We need to check, if current timeoutinterval value mist be greater than one second or not.

Q: Suppose Bob initiates a TCP connection to Trudy who is pretending to be Alice. During the handshake,…

Q: Does this make sense to you, or do you think it's wrong? Assume that the most recent SampleRTT on a…

A: Introduction: Before attempting a quick retransmit, TCP waits until it receives three duplicate…

Q: Consider Figure 3.58. Assuming TCP Reno is the protocol experiencing the behavior shown above,…

A: (1)The intervals of time when TCP slow start is operating(1-6) and…

Q: Is this statement correct? Assume that the most recent SampleRTT of a TCP connection is one second.…

A: RTT for TCP: RTT, or round-trip time, is the sum of the times it takes for a packet to travel from…

Q: Is this a good or bad idea? Assume that the most recent SampleRTT on a TCP connection is 1 second.…

A: Round-trip time, or RTT, is the sum of the time required to transmit the first packet to the…

Q: Assume that MSS = 1000 bytes and the slow start threshold is 20,000 bytes. Suppose that TCP is in…

A: Below is the answer to above question. I hope this will meet your requirements.

Q: Congestion window size (segments) 45 40 35 30 25 20 15 10 LO 5 0 02 4 6 8 10 12 14 16 18 20 22 24 26…

A: In TCP Reno, the segment loss event occurs when three duplicate acknowledgments (also known as…

Q: 9. Suppose Host A sends two TCP segments back-to-back to Host B. The first segment has sequence…

A: Given: Host A sends two TCP segments back-to-back to Host B. The first segment has sequence number…

Q: To answer this question, you may use the TCP state transition diagram. A TCP server is in the…

Q: onsider the TCP procedure for estimating RTT. Suppose that . Let SampleRTT be the most recent sample…

A: Step 1:- Introduction:- This question is related to networking. Networking is defined as a group of…

Q: TCP is a connection-oriented protocol. This means that. a. there is a direct physical connection…

A: EXPLANATION: TCP (Transmission Control Protocol) is a network protocol that connects two hosts and…

Q: What mechanism does TCP use for flow control? The receiver indicates how much data it is able to…

A: The problem is based on the basics of networking.

Q: Suppose two TCP connections are present over some bottleneck link of rate R bps. Both connections…

A: Transmission rate for the connections Here the two TCP connections are present over some bottleneck…

Q: Does this make sense to you, or do you believe it to be incorrect? Consider the most recent…

A: In a TCP connection, sampleRTT TCP is a connection-oriented protocol, and connection is required for…

Question

Phases of TCP congestion control. Consider the figure below, which plots the evolution of TCP's congestion
window at the beginning of each time unit (where the unit of time is equal to the RTT); see Figure 3.53 in the
text. In the abstract model for this problem, TCP sends a "flight" of packets of size cwnd at the beginning of each
time unit. The result of sending that flight of packets is that either (i) all packets are ACKed at the end of the time
unit, (ii) there is a timeout for the first packet, or (iii) there is a triple duplicate ACK for the first packet.
Congestion window size (in segments)
40
35
30
25
20
15
10
5
0
www
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
Time unit (in RTT)
A. During which of the following intervals of time is TCP performing slow start*?
B. During which of the following intervals of time is TCP performing congestion avoidance*?
C.
At the end of which units of time does TCP detect a triple-duplicate-ACK*?
D. At the end of which unit(s) of time does TCP detect a loss via timeout*?

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1: Explanation

Step 2: Part A

Step 3: Part B

Step 4: Part C

Step 5: Part D

Solution

Step by step

Solved in 6 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.

Similar questions

Dear Writer are you sure about the solution?I have this olution can you pleaae double check it? For each recognized segment in TCP slow start, the congestion window grows by one MSS. The congestion control method initiates a timeout and resets the congestion window to 1 MSS when all sent packets are lost. Yet, the threshold is also set to half of the current congestion window since the connection is still in the sluggish start phase. In order to obtain the slow start threshold, we must first determine the congestion window at the beginning of cycle 8 and then divide it by 2. One segment is transmitted and acknowledged in Round 1, and the congestion window is one MSS. Two segments are transmitted and acknowledged in Round 2, which has a congestion window of two MSS. In Round 3, 4 MSS of the congestion window is transmitted and acknowledged together with 4 segments. In Round 4, every packet that was sent is lost, therefore the congestion window is once again set to 1 MSS. Two segments…
Does this make sense to you, or do you believe it to be incorrect? Consider the most recent SampleRTT on a TCP connection to be one second. In order for the connection to be deemed active and functioning, the current TimeoutInterval value must be greater than one second.
Dear Writer could oyu please kindly check my solution as well and let me know. if it is correct? For each recognized segment in TCP slow start, the congestion window grows by one MSS. The congestion control method initiates a timeout and resets the congestion window to 1 MSS when all sent packets are lost. Yet, the threshold is also set to half of the current congestion window since the connection is still in the sluggish start phase. In order to obtain the slow start threshold, we must first determine the congestion window at the beginning of cycle 8 and then divide it by 2. One segment is transmitted and acknowledged in Round 1, and the congestion window is one MSS. Two segments are transmitted and acknowledged in Round 2, which has a congestion window of two MSS. In Round 3, 4 MSS of the congestion window is transmitted and acknowledged together with 4 segments. In Round 4, every packet that was sent is lost, therefore the congestion window is once again set to 1 MSS. Two segments…
199
The following event is shown to occur in the figure below illustrating the operation of TCP Reno. For the following prompt, clearly state where it occurs and how we can identify where this event occurs based on the shape of the graph or changes to the congestion window size. a.) TCP congestion avoidance.
Is this an accurate or wrong statement? For simplicity, let us assume that the most recent SampleRTT on a TCP connection is one second. The current TimeoutInterval value for the connection must be greater than one second in order to maintain the connection.
Can you confirm or deny that this is the case? Assume that the most recent SampleRTT on a TCP connection is 1 second. It's not possible to have a connection with a TimeoutInterval less than one second.
TCP is a connection-oriented protocol. This means that... O a. both of the endpoints communicating over TCP keep information about the state of the connection. O b. a TCP sender can start sending data to the receiver before the three-way handshake takes place. O c. there is a direct physical connection between the two endpoints of a TCP session. O d. both endpoints of a TCP session have to connect to a third party before data can be sent or received.
What mechanism does TCP use for flow control? The receiver indicates how much data it is able to receive in the "receive window" field of the TCP header. а. O b. TCP does not use flow control. O c. The sender estimates its congestion window, increasing it when it receives ACKS for previously sent data, and reducing it when a loss even occurs, like the expiration of the retransmission timer or three duplicate ACKS.
37. The figure below shows the TCP Congestion Window for various transmission rounds of a TCP connection. 20 --- 18 16 14 12 10 8 4 2 4 10 12 14 16 18 20 Transmission Round What is the phase of the TCP connection between t6 and t10 (i.e. between transmission rounds 6 and 10)? a. Slow start b. Multiplicative decrease c. Congestion control d. Fast recovery e. Congestion avoidance 00 00 2. Congestion Window (MSS)
A. During which of the following intervals of time is TCP performing slow start*?B. During which of the following intervals of time is TCP performing congestion avoidance C. At the end of which unit(s) of time does TCP detect a loss via timeout
Suppose two TCP connections share a path through a router R. The router's queue size is six segments; each connection has a stable congestion window of three segments. No congestion control is used by these connections. A third TCP connection now is attempted, also through R. The third connection does not use congestion control either. Describe a scenario in which, for at least a while, the third connection gets none of the available bandwidth, and the first two connections proceed with 50% each. Does it matter if the third connection uses slow start? How does full congestion avoidance on the part of the first two connections help solve this?