1. Quiz Review

2. Threats to a computer network
A virus is a piece of software that can replicate itself and infect a computer without the permission or knowledge of the user.
A virus can only spread when it is transmitted by a user over a network or the Internet, or through removable media such as CDs or memory sticks.

3. Threats to a computer network
SPAM is electronic junk ;
SPIM is spam sent via instant messaging systems;
SPIT is Spam over Internet Telephony;
Spoofing is an attack in which a person or program masquerades as another;
Phishing (pronounced “fishing”) is a common form of spoofing in which a phony web page is produced that looks just like a legitimate web page.;
Pharming (pronounced “farming”) is an attack in which a hacker attempts to redirect a website's traffic to another, bogus website.

4. Threats to a computer network
Spyware is software that is secretly installed on a computer without the user’s consent. It monitors user activity or interferes with user control over a personal computer;
A keylogger is a software program that is installed on a computer, often by a Trojan horse or virus. Keyloggers capture and record user keystrokes; and
Adware is software which automatically plays, displays, or downloads advertisements to a computer.

5. How to prevent viruses and spyware
Never click on links in s;
Never open the attachments;
Do not give out personal information;
Set secure passwords and don't share them with anyone;
Keep your operating system, browser, anti-virus and other critical software up to date;
Verify the authenticity of requests from companies or individuals by contacting them directly;
Pay close attention to website URLs;
For , turn off the option to automatically download attachments; and
Be suspicious of unknown links or requests sent through or text message.