(5 pts) (1.5) Why do we need hierarchical routing in Internet? What is an autonomous system (AS)? (5pts) (1.6) The process of using a forwarding table to select a next hop for a given datagram is called "forwarding". To handle ambiguity that arises from overlapping address mask, Internet forwarding uses a "longest prefix match". Please briefly explain "longest prefix match" and fill Suppose the couple rows from a forwardina +ah1n... If the dataga information and (ii) explain the reason