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3.9-1 Hop-by-hop congestion control (a).  We learned about end-to-end and network-assisted congestion control. A third type of congestion control (mostly deployed only in internal data-center networks) is hop-by-hop congestion control. In this approach a downstream router/host explicitly informs the previous hop upstream router/host about the amount of free buffer space it has available, and the upstream router will only forward a packet when it knows the downstream router has buffer space. Consider the three-hop scenario shown below, where the first and third links have capacity R, and the link between the routers has capacity R/2. What is the maximum throughput of the red connection, given that the red and blue connections are similarly controlled, and therefore have the same maximum throughpu

3.9-1 Hop-by-hop congestion control (a).  We learned about end-to-end and network-assisted congestion control. A third type of congestion control (mostly deployed only in internal data-center networks) is hop-by-hop congestion control. In this approach a downstream router/host explicitly informs the previous hop upstream router/host about the amount of free buffer space it has available, and the upstream router will only forward a packet when it knows the downstream router has buffer space. Consider the three-hop scenario shown below, where the first and third links have capacity R, and the link between the routers has capacity R/2. What is the maximum throughput of the red connection, given that the red and blue connections are similarly controlled, and therefore have the same maximum throughpu

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
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3.9-1 Hop-by-hop congestion control (a).  We learned about end-to-end and network-assisted congestion control. A third type of congestion control (mostly deployed only in internal data-center networks) is hop-by-hop congestion control. In this approach a downstream router/host explicitly informs the previous hop upstream router/host about the amount of free buffer space it has available, and the upstream router will only forward a packet when it knows the downstream router has buffer space.

Consider the three-hop scenario shown below, where the first and third links have capacity R, and the link between the routers has capacity R/2. What is the maximum throughput of the red connection, given that the red and blue connections are similarly controlled, and therefore have the same maximum throughput?

3.9-1 Hop-by-hop congestion control (a). We learned about end-to-end and network-assisted congestion control. A third type of congestion control (mostly deployed only in internal data-center networks) is hop-by-hop congestion control. In this approach a downstream router/host explicitly informs the previous hop upstream router/host about the amount of free buffer space it has available, and the upstream router will only forward a packet when it knows the downstream router has buffer space. Consider the three-hop scenario shown below, where the first and third links have capacity R, and the link between the routers has capacity R/2. What is the maximum throughput of the red connection, given that the red and blue connections are similarly controlled, and therefore have the same maximum throughput? - Din : original data 2in: original plus retransmitted Host A -Rout R R/2 Host B R R/4 R/2 OO0O
Transcribed Image Text:3.9-1 Hop-by-hop congestion control (a). We learned about end-to-end and network-assisted congestion control. A third type of congestion control (mostly deployed only in internal data-center networks) is hop-by-hop congestion control. In this approach a downstream router/host explicitly informs the previous hop upstream router/host about the amount of free buffer space it has available, and the upstream router will only forward a packet when it knows the downstream router has buffer space. Consider the three-hop scenario shown below, where the first and third links have capacity R, and the link between the routers has capacity R/2. What is the maximum throughput of the red connection, given that the red and blue connections are similarly controlled, and therefore have the same maximum throughput? - Din : original data 2in: original plus retransmitted Host A -Rout R R/2 Host B R R/4 R/2 OO0O
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