You receive complaints from customers that your Web site is inaccessible. You check the Web
server and notice that it is behaving sluggishly. You cannot explain the sluggishness because the
server logs show that few Web server connections exist. However, a security worker notices that

thousands of ICMP packets are being sent to the server every second, making the server drop
connections. What type of attack is being waged against your site?

A.
Password guessing

B.
Social engineering

C.
Brute force

D.
Denial of service