In which of the following attacks, a hacker uses a computer to call phone numbers in sequence until another computer answers?

Which of the following DoS attack sends a UDP packet to a random port on the victim's system?

a. SYN flood b. Ping of Death c. Smurf attack d. UDP flood

Which of the following settings of a timer's Interval property will raise a timer event every 5 seconds?

(A) 5 (B) 5000 (C) 5 seconds (D) 5000 milliseconds