Problem

In distance-vector routing, good news (decrease in a link metric) will propagate fast. In...

In distance-vector routing, good news (decrease in a link metric) will propagate fast. In other words, if a link distance decreases, all nodes quickly learn about it and update their vectors. In Figure 4.112, we assume that a four-node internet is stable, but suddenly the distance between nodes A and D, which is currently 6, is decreased to 1 (probably due to some improvement in the link quality). Show how this good news is propagated, and find the new distance vector for each node after stabilization.

Figure 4.112 Problem 4-35

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Solutions For Problems in Chapter 4

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