John works as a professional Ethical Hacker. He is assigned a project to test the security of www.weare- secure.com. He wants to test the response of a DDoS attack on the we-are-secure server. To accomplish this, he takes the following steps:
* Instead of directly attacking the target computer, he first identifies a less secure network named Infosecure that contains a network of 100 computers.
* He breaks this less secure network and takes control of all its computers. After completing this step, he installs a DDoS attack tool on each computer of the Infosecure network.
* Finally, he uses all the computers of the less secure network to carry out the DDoS attack on the we-are- secure server.
Which of the following tools can John use to accomplish the task?
Each correct answer represents a complete solution. Choose all that apply.

Which of the following types of cryptography algorithms is a symmetric key cipher which operates on fixed- length groups of bits, termed blocks, with an unvarying transformation?

Which of the following types of attacks entices a user to disclose personal information such as social security number, bank account details, or credit card number?

Which of the following viruses infects multiple targets?

Which of the following types of security will be the cause of concern if the server has been stolen from the organization's premises?