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A massive distributed denial of service (DDoS) attack has the potential to take down the entire cloud. Using a single cloud is really a single point of failure. To achieve high availability, redundancy is required everywhere to do away with the single points of failure. Multi-cloud, hybrid cloud, or hybrid multi-cloud are only three options for mission critical systems: multi, hybrid or hybrid. High availability at the customer site requires that there be two routers connecting to each cloud provider, with each router being a high-availability router with multiple control modules.