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
Problem 1PE
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Transcribed Image Text:**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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