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Assume you are using the Go-Back-N protocol with a window size of 5 slots, sequence numbers ranging [0,20] and that the sender side application has at least 20 packets worth of data ready to send to the transport layer. Consider now that the sender has sent out a full window of packets, with sequence numbers 0 thru 4. If the sender receives the following ACKS: ACKO, ACK1, ACK2, ACK2, ACK2, ACK2, ACK2, and then a time out occurs, which packets does the sender retransmit? Packets 0 thru 4 Packets 3 and 4 Packet 3 Packets 3 thru 7

Assume you are using the Go-Back-N protocol with a window size of 5 slots, sequence numbers ranging [0,20] and that the sender side application has at least 20 packets worth of data ready to send to the transport layer. Consider now that the sender has sent out a full window of packets, with sequence numbers 0 thru 4. If the sender receives the following ACKS: ACKO, ACK1, ACK2, ACK2, ACK2, ACK2, ACK2, and then a time out occurs, which packets does the sender retransmit? Packets 0 thru 4 Packets 3 and 4 Packet 3 Packets 3 thru 7

Database System Concepts
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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Assume you are using the Go-Back-N protocol with a window size of 5 slots, sequence numbers ranging [0,20] and that the sender side application has at least 20 packets worth of data ready to send to the transport layer. Consider now that the sender has sent out a full window of packets, with sequence numbers 0 thru 4. If the sender receives the following ACKS: ACKO, ACK1, ACK2, ACK2, ACK2, ACK2, ACK2, and then a time out occurs, which packets does the sender retransmit? Packets 0 thru 4 Packets 3 and 4 Packet 3 Packets 3 thru 7
Transcribed Image Text:Assume you are using the Go-Back-N protocol with a window size of 5 slots, sequence numbers ranging [0,20] and that the sender side application has at least 20 packets worth of data ready to send to the transport layer. Consider now that the sender has sent out a full window of packets, with sequence numbers 0 thru 4. If the sender receives the following ACKS: ACKO, ACK1, ACK2, ACK2, ACK2, ACK2, ACK2, and then a time out occurs, which packets does the sender retransmit? Packets 0 thru 4 Packets 3 and 4 Packet 3 Packets 3 thru 7
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