TCP: retransmission scenarios Host A timeout Seq=92, 8 bytes of data X Host B ACK=100 Seq=92, 8 bytes of data ACK=100 lost ACK scenario Host A SendBase=92 timeout SendBase=100 SendBase=120 SendBase=120 Seq=92, 8 bytes of data Seq=100, 20 bytes of data ACK=100 ACK=120 Seq=92, 8 bytes of data Host B ACK 120 premature timeout send cumulative ACK for 120 ↑
TCP: retransmission scenarios Host A timeout Seq=92, 8 bytes of data X Host B ACK=100 Seq=92, 8 bytes of data ACK=100 lost ACK scenario Host A SendBase=92 timeout SendBase=100 SendBase=120 SendBase=120 Seq=92, 8 bytes of data Seq=100, 20 bytes of data ACK=100 ACK=120 Seq=92, 8 bytes of data Host B ACK 120 premature timeout send cumulative ACK for 120 ↑
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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Question
Can anyone explain why there is a timeout in 2n diagram (the right one) eventhough nothing got lost? what is the concept of timeout in simple words????
![CP: retransmission scenarios
Host A
14
timeout
Seq=92, 8 bytes of data
X
Host B
11:35 / 14:19
ACK=100
Seq=92, 8 bytes of data
ACK=100
lost ACK scenario
Host A
SendBase=92
timeout
SendBase=100
SendBase=120
SendBase=120
Seq=92, 8 bytes of data
Seq=100, 20 bytes of data
ACK=100
ACK=120
Seq=92, 8
bytes of data.
ACK=120
Host B
II
premature timeout
CC
HD
send cumulative
ACK for 120
↑](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F7daa69d8-205a-4b72-abf5-96966d755823%2F4e872993-42ce-4087-80b7-6a459cdc0891%2Fbs5f6of_processed.png&w=3840&q=75)
Transcribed Image Text:CP: retransmission scenarios
Host A
14
timeout
Seq=92, 8 bytes of data
X
Host B
11:35 / 14:19
ACK=100
Seq=92, 8 bytes of data
ACK=100
lost ACK scenario
Host A
SendBase=92
timeout
SendBase=100
SendBase=120
SendBase=120
Seq=92, 8 bytes of data
Seq=100, 20 bytes of data
ACK=100
ACK=120
Seq=92, 8
bytes of data.
ACK=120
Host B
II
premature timeout
CC
HD
send cumulative
ACK for 120
↑
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