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.

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Definitions:

Physical Energies

The various forms of energy, such as kinetic, potential, thermal, gravitational, sound, light, elastic, and electromagnetic energy, that have physical properties.

Sensation

The process by which our sensory receptors and nervous system receive and represent stimulus energies from our environment.

Perception

The process by which individuals organize and interpret their sensory impressions to give meaning to their environment.

Sense Receptors

Cells or organs that receive stimuli from the external or internal environment and convert them into neural signals for interpretation by the brain.