Consider this switched network. Assume that Spanning Tree Protocol $($STP$)$ is running on

this network. Fa interfaces run at $100$ Mbps and G interfaces run at $1$ Gbps$.$ The table

below shows the Bridge ID $($BID$)$ value for each switch, split into Priority and MAC

Address parts. All ports are on VLAN $1.$ Assume that all links have default costs.

$(4$ points$)$ When STP protocol is run, which switch $($S$1,$ S$2$ or S$3)$ will become the

Root Switch for this network? Why?

b$.(7$ points$)$ For each of the following ports, tell me its Port Role. Each of your

answers should be either $$Root Port$,$Designated Port$$ or $$Alternate Port$.$

i$.$ S$1$ Fa$0/1$

ii$.$ S$1$ G$0/2$

iii. S$2$ Fa$0/1$

iv$.$ S$2$ G$0/2$

v$.$ S$3$ G$0/1$

vi$.$ S$3$ G$0/2$

c$.(4$ points$)$ Which ports in this network will be placed into the Blocking State?

d$.(5$ points$)$ What is the Root Path Cost for switch S$1?$ That is$,$ what is the Path Cost

from S$1$ to the Root Switch?

e$.$ Assume that the Host Fa$0$ MAC address is $11$:$22$:$33$:$44$:$55$:$66.$ After STP has

determined port roles, the Host sends out a broadcast, so that its MAC address is

added to the Forwarding Table on each of the $3$ switches.

i$.(3$ points$)$ What is the S$2$ port $($either Fa$0/1,$ Fa$0/2$ or G$0/2)$ associated with

$11$:$22$:$33$:$44$:$55$:$66$ in the S$2$ Forwarding Table?

Switch S$2$ Forwarding Table

MAC Address Port

$11$:$22$:$33$:$44$:$55$:$66??$

ii$.(3$ points$)$ What is the S$3$ port associated with $11$:$22$:$33$:$44$:$55$:$66$ in the S$3$

Forwarding Table?

Switch S$3$ Forwarding Table

MAC Address Port

$11$:$22$:$33$:$44$:$55$:$66??$

f$.(4$ points$)$ Now you want Switch S$3$ to become the new Root Switch. What

command could you type on the Switch S$3$ CLI to make this happen?