What Is a Denial of Service Attack

question 54

Multiple Choice

What is a denial of service attack?

• A) A denial of service attack occurs when the perpetrator sends hundreds of messages from randomly generated false addresses, overloading an Internet service provider's e-mail server.
• B) A denial of service attack occurs when an e-mail message is sent through a re-mailer, who removes the message headers making the message anonymous, then resends the message to selected addresses.
• C) A denial of service attack occurs when a cracker enters a system through an idle modem, captures the PC attached to the modem, and then gains access to the network to which it is connected.
• D) A denial of service attack occurs when the perpetrator e-mails the same message to everyone on one or more Usenet newsgroups LISTSERV lists.

---

Definitions:

Correlation Coefficient

A measure that determines the degree to which two variables' movements are associated, ranging from -1 (perfect negative correlation) to +1 (perfect positive correlation).

Prediction Interval

An estimate of an interval in which future observations will fall, with a certain degree of confidence, based on a predictive model.

Linear Regression

A mathematical approach that models how a dependent variable changes based on one or several independent variables, by adapting a linear equation to the data collected.

Mean Value

The average of a set of numbers, calculated by dividing the sum of these numbers by the count of numbers in the set.