network

i want question 1-2-3 solved please asap

Switch1 Switch2 1 =X 2 2 X 3 Switch 2 Table Incoming Outgoing Port VCI Port VCI C 20 3 27 2 Switch1 Table Incoming Outgoing Port va Port VCI 1 8 a Switch 3 Table Incoming Outgoing Port VC Port VCI 2 d e f 1 3 X B Switch3 VCI= 36 1. Give an example network that uses virtual circuits (Mark) 2. What are the two types of addresses involved in virtual circuits 2 Marks? 3. From the figure above, what are the values of the following a b c d and f3 Marks