**3.5-2b. TCP Sequence and ACK Numbers (b).**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 \( t=7 \).**Question:**What is the ACK value carried in the receiver-to-sender ACK sent at \( t = 6 \)?**Options:**- 200- 100- 1- 2- 0- None of these other answers.**Diagram Description:**- The diagram illustrates a TCP communication between a sender and a receiver.- At times \( t = 1 \) to \( t = 8 \), the sender sends eight data segments to the receiver.- The segment sent at \( t=4 \) is lost, indicated by a red "X."- The receiver sends ACKs for received segments at specific times. The ACK sent at \( t=7 \) is lost, also marked with a red "X."- ACKs successfully sent are labeled at \( t=6, 11, 12, 14, 16 \).In the scenario described, the goal is to determine the appropriate ACK value at \( t=6 \) after the loss of the fourth segment.

TCP Sequence Number is a 4-byte field in the TCP header that shows the primary byte of the active…

The segment sent at t=4 is lost, as is the ACK segment sent at t=7. TCP sender 200 100 1 t=1 t=2+ t=3+ t=4+ t=5+ t=6+ 02 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 3.5-2b. TCP sequence and ACK numbers (b). 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 is the ACK value carried in the receiver-to-sender ACK sent at t = 6? TCP receiver O None of these other answers. t=6 t=7 t=8 t=9 t=10 t=11 t=12 t=13

The segment sent at t=4 is lost, as is the ACK segment sent at t=7. TCP sender 200 100 1 t=1 t=2+ t=3+ t=4+ t=5+ t=6+ 02 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 3.5-2b. TCP sequence and ACK numbers (b). 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 is the ACK value carried in the receiver-to-sender ACK sent at t = 6? TCP receiver O None of these other answers. t=6 t=7 t=8 t=9 t=10 t=11 t=12 t=13

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

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Concept explainers

Race Condition

A race condition occurs within a critical section when two or more tasks try to access and alter a shared resource simultaneously. As a consequence, the process changes to a state of inconsistency.

Question

**3.5-2b. TCP Sequence and ACK Numbers (b).**

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 \( t=7 \).

**Question:**
What is the ACK value carried in the receiver-to-sender ACK sent at \( t = 6 \)?

**Options:**
- 200
- 100
- 1
- 2
- 0
- None of these other answers.

**Diagram Description:**
- The diagram illustrates a TCP communication between a sender and a receiver.
- At times \( t = 1 \) to \( t = 8 \), the sender sends eight data segments to the receiver.
- The segment sent at \( t=4 \) is lost, indicated by a red "X."
- The receiver sends ACKs for received segments at specific times. The ACK sent at \( t=7 \) is lost, also marked with a red "X."
- ACKs successfully sent are labeled at \( t=6, 11, 12, 14, 16 \).

In the scenario described, the goal is to determine the appropriate ACK value at \( t=6 \) after the loss of the fourth segment.

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