An attack that has a master host, a zombie, and multiple middle devices running zombie programs is called a __________.

A.
DoS

B.
DDoS

C.
Worm

D.
Boot sector infector

Explanation:
A distributed denial-of-service attack is an extension of a typical DoS attack. It can strike multiple times and uses multiple systems. The zombie computer runs the program unknowingly and is used to attack other systems.