For the network given in Figure $3\mathrm{.}51,$ give

global distance$-$vector tables like those of

Tables $3\mathrm{.}12$ and $3\mathrm{.}15$ when:

$($a$)$ each node knows only the distances to

its immediate neighbors.

$($b$)$ each node has reported the information

it had in the preceding step to its

immediate neighbors.

$($c$)$ step $($b$)$ happens a second time.

FIGURE $3\mathrm{.}51$ Network for

Exercises $44,46,$ and $52.$