Scenario $1$: Domain Name System $($DNS$)$ Server Denial of Service $($DoS$)$ On a Saturday afternoon, extemal users start having problems accessing the organization's public websites. Over the next hour, the problem worsens to the point where nearly every access attempt fails. Meanwhile, a member of the organization's networking staff responds to alerts from an Internet border router and determines that the organization's Internet bandwidth is being consumed by an unusually large volume of User Datagram Protocol $($UDP$)$ packets to and from both the organization's public DNS serversAnalysis of the traffic shows that the DNS servers are receiving high volumes of requests from a single external IP address $.$ Also, all the DNS requests from that address come from the same source port