On december 23, 2015, at 3: 30 pm, the three utilities began to receive thousands of bogus telephone calls appearing to originated from moscow. the attacker's goal appears to have been to keep customers from being able to report legitimate power outages and hinder the response of the utilities to next attack. this type of attack, which attempts to overwhelm systems with data is know as what?

This type of attack, which attempts to overwhelm systems with data is know as:

Distributed Denial of Service Attack

Explanation:

Cyber Attack:

It is an attack on a computer or a network system to steal information, change something on a computer, gain unauthorized access to a system.

There are many types of cyber attack and one of them is

Distributed Denial of Service Attack:

Such a cyber attack in which the system is overwhelmed with the bulk data to damage a system. Recently, a company was attacked with a data in terabytes per second.

In our case, the utilities received thousand of bogus calls as attacker overwhelmed the utilities so that customers can't report real response so which is distributed denial of service cyber attack.

answer; the correct answer is (composition);