3.7-1c. TCP congestion control example (c). Consider again the figure above, where a TCP sender sends 8 TCP segments at t = 1, 2, 3, 4, 5, 6, 7, 8 and the segment sent at t=4 is lost, as is the ACK segment sent at t=7. What does the sender do at t=16? You can assume for this question that no timeouts have occurred. Sets its cwnd window value to 1, and retransmit the segment with sequence number 300 Cut its value of cwnd in half, and retransmit the segment with sequence number 300 Inform the upper layer that the connection is terminated, and close the socket. Do nothing except increment the number of duplicate ACKs received by 1.

3.7-1c. TCP congestion control example (c). Consider again the figure above, where a TCP sender sends 8 TCP segments at t = 1, 2, 3, 4, 5, 6, 7, 8 and the segment sent at t=4 is lost, as is the ACK segment sent at t=7. What does the sender do at t=16? You can assume for this question that no timeouts have occurred. Sets its cwnd window value to 1, and retransmit the segment with sequence number 300 Cut its value of cwnd in half, and retransmit the segment with sequence number 300 Inform the upper layer that the connection is terminated, and close the socket. Do nothing except increment the number of duplicate ACKs received by 1.

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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Concept explainers

Network transmission cabling

A network is a collection of devices connected by communication links. A device can be a computer or any instrument capable of sending and receiving data or information formed by other nodes toward the network. A channel that connects people or things is known as a network. It sends the data from one place to another. It is the basic concept of a computer, network, and data communications.

Question

TCP
sender
t=1
t=2+
t=3+
t=4+
t=5+
t=6
t=11
t=12
t=13
t=14
t=15
t=16
t=17
t=18
data segment
data segment
data segment
data segment
--data segment
*
data segment
--data segment
data segment
ACK
ACK
ACK
ACK
ACK
ACK
TCP
receiver
t=6
t=7
t=8
t=9
t=10
t=11
t=12
t=13
3.7-1c. TCP congestion control example (c). Consider again the figure above, where a TCP sender
sends 8 TCP segments at t = 1, 2, 3, 4, 5, 6, 7, 8 and the segment sent at t=4 is lost, as is the ACK
segment sent at t=7.
What does the sender do at t=16? You can assume for this question that no timeouts have occurred.
Sets its cwnd window value to 1, and retransmit the segment with sequence number 300
Cut its value of cwnd in half, and retransmit the segment with sequence number 300
Inform the upper layer that the connection is terminated, and close the socket.
Do nothing except increment the number of duplicate ACKs received by 1.

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