Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Consider a simple congestion-control algorithm that uses linear increase and
multiplicative decrease but not slow start, that works in units of packets rather than
bytes, and that starts each connection with a congestion window equal to one
packet. Give a detailed sketch of this algorithm. Assume the delay is latency only
and that when a group of packets is sent only a single ACK is returned. Plot the
congestion window as a function of round-trip times for the situation in which the
following packets are lost: 9, 25, 30, 38, and 50. For simplicity, assume a perfect
timeout mechanism that detects a lost packet exactly 1 RTT after it is transmitted.
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Transcribed Image Text:Consider a simple congestion-control algorithm that uses linear increase and multiplicative decrease but not slow start, that works in units of packets rather than bytes, and that starts each connection with a congestion window equal to one packet. Give a detailed sketch of this algorithm. Assume the delay is latency only and that when a group of packets is sent only a single ACK is returned. Plot the congestion window as a function of round-trip times for the situation in which the following packets are lost: 9, 25, 30, 38, and 50. For simplicity, assume a perfect timeout mechanism that detects a lost packet exactly 1 RTT after it is transmitted.
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