Solve it in 20 min maximum please , network engineering please solve it all

Switch1 Switch2 A A 1 2 X 3 Switch1 Table Incoming Outgoing Port VCI Port VCI 1 8 a b Switch 2 Table Incoming Outgoing Port VCI Port VCI 2 C 20 3 3 27 1 3 X B 00 Switch3 Table Incoming Outgoing Port VCI Port VCI 2 d e f Switch3 VCI= 36 119 minutes remaining 3 Incoming Port VCI B Outgoing Port VCI Switch3 VCI= 36 2 d e f 1. Give an example network that uses virtual circuits (1 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 f(3 Marks? Use the editor to format your answer 119 minutes remaining