Question $2.$

Six stations whose addresses are $10,20,30,40,50,60$ are connected to a Token$-$Bus LAN.

a$.$ Give the scenario that would be normally followed when Station $30$ leaves the ring

intentionally $($when it has the token$).$

b$.$ What will happen if Station $30$ leaves the ring non$-$intentionally $($because of power

failure for instance$).$

c$.$ Station with address $45$ is powered on and would like to join the ring. Describe the

procedure.