What Is Network Security and How Does It Protect You?

After asking What is network security?, you should ask, What are the threats to my network?
Many network security threats today are spread over the Internet. The most common include:

• Viruses, worms, and Trojan horses
• Spyware and adware
• Zero-day attacks, also called zero-hour attacks
• Hacker attacks
• Denial of service attacks
• Data interception and theft
• Identity theft