Eccouncil Exam ECSS Topic 6 Question 34 Discussion

John works as a professional Ethical Hacker. He has been assigned a project to test the security of www.we-are-secure.com. He observes that the We-are-secure server is vulnerable to a special type of DoS attack and he makes the following suggestions to the security authority to protect the server from this DoS attack. The countermeasures against this type of DoS attack are as follows:

Disabling IP-directed broadcasts at the We-are-secure router

Configuring local computers so as not to respond to such ICMP packets that are configured to be sent to IP broadcast addresses

Which of the following DoS attacks has John discovered as a vulnerability for the We-are-secure security network?