### 3.7-1e. TCP Congestion Control Example (e)**Diagram Explanation:** The diagram illustrates a TCP sender and receiver communicating over time. The sender transmits 8 TCP segments at times t = 1, 2, 3, 4, 5, 6, 7, 8. However, the segment sent at t = 4 is lost, as indicated by a red "X" on the diagram. Similarly, the ACK (Acknowledgment) segment sent at t = 7 is lost.**Textual Explanation:** After time t = 17, a timeout event occurs. The situation requires the sender to decide on the next course of action. The multiple-choice options are:- **Option 1:** Sets its cwnd (congestion window) value to 1, and retransmits the segment with sequence number 300.- **Option 2:** Sets its cwnd window value to 1, and retransmits the segment with sequence number 100.- **Option 3:** Inform the upper layer that the connection is terminated and close the socket.- **Option 4:** Do nothing.- **Option 5:** Cut its cwnd window value in half, and retransmit the segment with sequence number 300.This scenario involves understanding TCP congestion control and how the protocol responds to lost segments and timeout events.

Answer is explained below in detail

TCP sender t=1 t=2+ t=3+ 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 3.7-1e. TCP congestion control example (e). Consider again the figure above (in question 3.7-1a), 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. Suppose that the next event after t=17 is a timeout event. What does the sender do? O Sets it its cwnd window value to 1, and retransmit the segment with sequence number 300 O Sets it its cwnd window value to 1, a, and retransmit the segment with sequence number 100 O Inform the upper layer that the connection is terminated, and close the socket. O Do nothing. O Cut its cwnd window value in half, and retransmit the segment with sequence number 300

TCP sender t=1 t=2+ t=3+ 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 3.7-1e. TCP congestion control example (e). Consider again the figure above (in question 3.7-1a), 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. Suppose that the next event after t=17 is a timeout event. What does the sender do? O Sets it its cwnd window value to 1, and retransmit the segment with sequence number 300 O Sets it its cwnd window value to 1, a, and retransmit the segment with sequence number 100 O Inform the upper layer that the connection is terminated, and close the socket. O Do nothing. O Cut its cwnd window value in half, and retransmit the segment with sequence number 300

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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