Task $1$

Given is a network according to Figure $1\mathrm{.}1.$ It includes $6$ Ethernet switches $($S$1$ to $S6)$ and $2$ host

computers A and B$.$ Figure $1\mathrm{.}1$ shows the interconnection of the switches with the ports Pxy after

determining the spanning tree. The address tables of the switches are all empty. Show how

subsequently, in an adaptive learning process, the address tables of switches $1$ to $6$ are filled

according to the events that occur in sequence.

Host A

Fig. $1\mathrm{.}1$

a Host B sends Ethernet frame to Host A$.$

S$1$

S$2$

S$3$

S$4$

S$5$

S$6$

b Host A sends Ethernet frame to Host B$.$

S$1$

S$2$

S$3$

S$4$

$$5$

S$6$

Now Host A moves to port P$40$ of S$4.$

c Host B sends Ethernet frame to Host A$.$

S$1$

S$2$

S$3$

S$4$

S$5$

S$6$

d Host A sends Ethernet frame to Host B$.$

Now Host B changes its MAC$-$address into $c.$

e Host B sends Ethernet frame to Host A