Computer security primarily aims to protect information systems from ___ and ___.

Theft and damage

What percentage of security safeguards is attributed to the user according to the '90 / 10' Rule?

90%

True or False: A backdoor is a legitimate method of authentication.

False; a backdoor is a secret method of bypassing normal security controls.

Fill in the blank: Phishing attempts to acquire sensitive information such as ___ and ___ from users.

Usernames and passwords

What type of virus infects the boot record of a hard disk?

Boot sector virus

Riddle: I hide in your files, waiting for an event to call, when I strike, your data can fall. What am I?

A bomb virus

What is the main function of a worm in computer security?

To duplicate itself and spread to other systems

True or False: Trojan horses replicate themselves on the victim's disk.

False; Trojan horses do not replicate themselves.

Denial-of-service attacks aim to make a machine or network resource ___ to its intended users.

Unavailable

What precaution should be taken to protect against viruses when using USB drives?

USB drives should be scanned for viruses and not used on infected computers.