Consider the following. You are an ISP and have a group of addresses (CIDR blocks) to allocate to your customers. You have allocated addresses to a number of customers from a CIDR block of 198.9.128.0/18 (equivalent to the block of Class C addresses 198.9.128.0 through 198.9.191.0). Now one of your clients wants to stop using your ISP service and move to another ISP, while keeping their /24 that you had allocated to them (198.9.145.0/24). You are in a dilemma, as youcannot take back this address (their lawyers are better than yours!), yet advertising a CIDR block that contains that address seems to break the rules of CIDR routing. a. Show how routing based on the longest (most specific) match allows you to continue advertising this CIDR block. b. Show what happens to the ex-customers traffic if there is a bug in the Internet and their route gets dropped.