The figure shows a TCP transaction. Assume Host A always has data to send, and each packet has size 20 window of 80 Bytes, that is, it can send four "in-flight" packets maximum. Answer the following questions. Host A Host B Seq-80, 20 bytes of data Seq=100, 20 bytes of data X ACK #1 ACK #2 ACK #3 (A) What are the ACK numbers for ACK #1, #2, and #3? 1. ACK #1: 2. ACK #2: 3. ACK #3: (B) When ACK #1 is received, will Host A send out any packets? 1. Yes or No? 2. If yes, how many packets will be sent, and what are their sequence numbers? 3. Number of packets: 4. Sequence numbers: 5. If No, why not? (C) When ACK #2 is received, will Host A send out any packets? 1. Yes or No? 2. If yes, how many packets will be sent, and what are their sequence numbers? 3. Number of packets: 4. Sequence numbers: 5. If No, why not? (D) When ACK #3 is received, will Host A send out any packets? 1. Yes or No? 2. If yes, how many packets will be sent, and what are their sequence numbers? 3. Number of packets: 4. Sequence numbers: 5. If No, why not?

The figure shows a TCP transaction. Assume Host A always has data to send, and each packet has size 20 window of 80 Bytes, that is, it can send four "in-flight" packets maximum. Answer the following questions. Host A Host B Seq-80, 20 bytes of data Seq=100, 20 bytes of data X ACK #1 ACK #2 ACK #3 (A) What are the ACK numbers for ACK #1, #2, and #3? 1. ACK #1: 2. ACK #2: 3. ACK #3: (B) When ACK #1 is received, will Host A send out any packets? 1. Yes or No? 2. If yes, how many packets will be sent, and what are their sequence numbers? 3. Number of packets: 4. Sequence numbers: 5. If No, why not? (C) When ACK #2 is received, will Host A send out any packets? 1. Yes or No? 2. If yes, how many packets will be sent, and what are their sequence numbers? 3. Number of packets: 4. Sequence numbers: 5. If No, why not? (D) When ACK #3 is received, will Host A send out any packets? 1. Yes or No? 2. If yes, how many packets will be sent, and what are their sequence numbers? 3. Number of packets: 4. Sequence numbers: 5. If No, why not?

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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