Consider the network shown in the figure below which comprises $12$ hosts $($H$1-$H$12),8$ Ethernet switches $($S$1-$S$8)$ and a router. Suppose that the switch tables in all switches are empty and that the router forwarding tables are correctly configured. Once an entry is added to a switch table, you may assume that it persists forever. There is no other traffic exchanged in the network other than that noted in the questions below.