Which of the following sequence of events best describes an online intrusion?
a)A backdoor is opened on the device locally, which allows malware to be loaded onto the device by a hacker.
b) A USB drive containing a trojan is inserted into a device which opens a backdoor, allowing a hacker access to the device.
c) Malware enters the device, then opens a backdoor, leading to an open communications link on the device that a hacker can exploit.
d) None of the above
