As part of your design to secure a service provider WAN. you are asked to design a destination-based remote triggered black hole (RTBH) solution What arc two reasons for using this design? (Choose two)
A. The attack is focused on a single IP address
B. You do not know the source address of DDoS packets
C. The attack comes from a limited number of source IP addresses
D. You want to ensure that the destination IP remains reachable