A group of 2m - 1 routers are interconnected in a centralized binary tree, with

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A group of 2m - 1 routers are interconnected in a centralized binary tree, with router at each tree node. Router I communicate with router J by sending a message to the root of the tree. The root then sends the message back down to J. Then find the mean router-router path length.

Options:

A . 2 (m - 2)

B . 2 (2m - 1)

C . m - 1

D . (2m - l)/mJ

Answer: Option A

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