Consider the LAN in Figure $2$

i$.$ How many subnets can you find? Write down the labels $($letters$)$

of the hosts in each subnet.

ii$.$ What is the physical topology of the subnet$($s$)?$

iii. How does the switch know A is reachable via interface $1,$ B reachable via interface $2$ and so on $($Use a simple example to briefly

explain your answer$)$