Suppose host A reaches host B via routers R1 and R2: A-R1-R2–B. Fast retransmit is not used, and A calculates TimeOut as 2 x Estimated RTT. Assume that the A-R1 and R2-B links have infinite bandwidth; the R1 →→R2 link, however, introduces a 1-second-per-packet bandwidth delay for data packets (though not ACKS). Describe a scenario in which the R1-R2 link is not 100% utilized, even though A always has data ready to send. (Hint: Suppose A's Congestion Window increases from N to N + 1, where N is R1's queue size)
Suppose host A reaches host B via routers R1 and R2: A-R1-R2–B. Fast retransmit is not used, and A calculates TimeOut as 2 x Estimated RTT. Assume that the A-R1 and R2-B links have infinite bandwidth; the R1 →→R2 link, however, introduces a 1-second-per-packet bandwidth delay for data packets (though not ACKS). Describe a scenario in which the R1-R2 link is not 100% utilized, even though A always has data ready to send. (Hint: Suppose A's Congestion Window increases from N to N + 1, where N is R1's queue size)
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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