During the infection stage, what three actions does a computer virus typically perform?
a. infect the system, deliver its payload, multiply
b. attach to email, unleash its payload, delete antivirus files
c. replicate itself, conceal itself, activate when a condition or event occurs
d. conceal itself, replicate itself, release its payload
Which of the following is true of VoIP?
a. It uses a slow speed dial-up connection.
b. It uses the public switched telephone network.
c. Skype is an example of VoIP software.
d. All of the above.
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