UDP is a connectionless protocol. A large number of UDP flood attacks cause the performance of network devices that rely on session forwarding to be degraded and even the session table is exhausted, causing network congestion.
Which of the following options does not prevent UDP flood attacks?

Which of the following statements is wrong about anti-spam answerback codes?

Which of the following options are not part of the PDRR security model?

When misuse detection techniques are used, false positives are reported if the normal user behavior matches the intrusion signature repository successfully.

When the AntiDDoS system detects attack traffic, the attack traffic is directed to the cleaning device. After the cleaning device completes cleaning, the traffic is re-injected to the original link. Which of the following options does not belong to the injection method?