Switch1 Switch2 2 A X 2 X 3 Switch1 Table Incoming Outgoing Port VCI Port VCI 1 8 a b Switch2 Table Incoming Outgoing Port VCI Port VCI 20 3 27 N 1 3 Switch3 Table Incoming Outgoing Port VCI Port VCI X B 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