As a business with Internet access, you need to know how to protect your company from unauthorized users. Learn how to test your network for potential security holes, new cracking techniques, and how to get network administrators to get users to employ safer practices on the Internet. A look at various attacks, such as denial of service attacks, spoofing, intrusion detection and a look at the tools used by hackers and crackers. Also, learn how to protect yourself from others and how to ensure the security of your network through such techniques as firewalls, proxy servers, and other tools. Developing a security strategy and supporting policies will also be discussed.