John works as a Professional Ethical Hacker for we-are-secure Inc. The company is using a Wireless network. John has been assigned the work to check the security of WLAN of we-aresecure. 

For this, he tries to capture the traffic, however, he does not find a good traffic to analyze data. He has already discovered the network using the ettercap tool. Which of the following tools can he use to generate traffic so that he can crack the Wep keys and enter into the network?