Yvonne Has Received Reports That the Web Server She Administers

Yvonne has received reports that the Web server she administers has been responding slowly to page requests, and often responds so slowly that requested pages are never received. After reviewing the server logs, Yvonne determines that the Web server has received more than 1 billion requests sent to a nonexistent port. The Web server is the target of:

A) denial-of-service attacks.
B) database tampering.
C) pharming attacks.
D) buffer overflow attacks.