Jack, a skillful hacker targeted a major banking services firm located in Japan, using the LOIC (Low Orbit Ion Cannon) tool, Jack made the number of HTTP requests rise to a high level, which made the victim's server with the number of requests and resulted in failure of server responding to the request and crashed. Which type of attack Jack performed in the above scenario?

denial-of-service attack (DoS attack) and distributed denial-of-service attack (DDoS attack)

Explanation:

Denial-of-service attack -

It is a type of cyber attack , where the hacker can create a machine or any network resource , which is capable to disrupt the server of the host , with the help of the internet , is referred to as the denial of service attack .

The task is accomplished with by flooding the host with many superfluous requests , which can overload the system .

In case of the distributed denial-of-service attack , the flooding is done by many different sources .

Hence , from the given scenario of the question ,

The correct answer is  denial-of-service attack (DoS attack) and distributed denial-of-service attack (DDoS attack) .