$1$A$.$ Consider the bridged network given in Figure. Q$\mathrm{.}1$A$.$ Show the stepwise building of

forwarding table for the bridges B$1,$ B$2,$ B$3$ when packet exchange occurs in the order

as given below.

i$)x$ sends to $Q$

ii$)Z$ sends to $R$

iii$)P$ sends to $B$

iv$)Y$ sends to $x$

v$)Z$ sends to $P$

Figure. Q$\mathrm{.}1$A