If the arrival rate of a network prefix exceeds a threshold, ACC regards all traffic to this network prefix as DDOS attack traffic and responds to all incoming traffic sent to this network prefix.

• 如果一个网络前缀的到达率超过阈值，ACC就把这个网络前缀的所有流量当作DDOS攻击流量并对所有发向这个网络前缀的输入流量做出响应。