Several computers in your company have recently been compromised. It was discovered that your company network had been under attack for several months. However, these attacks had not been previously detected. The attackers exploited both network and host vulnerabilities.

The head of your company decides that security needs to be enhanced. The company network should be modified to prevent a majority of further attacks. Attacks that cannot be prevented should be at least detected. However, solutions for tolerating undetected attacks should also be envisioned. The head of the company charges you to come up with a plan. A rough estimate of the maximum cost of this task is: $500K for equipment and software and at least 1 full-time security administrator. However, the head of your company indicates that these numbers could change based on your proposal. Your goal is to propose the best plan that would provide the best level of security for adequate cost and resources.

The company already has a network of Linux computers for scientific research and a network of Windows computers for administrative tasks. Moreover, the company relies on its web server to advertise and sell some of its products. Both networks should be made more secure. Both networks should also be able to securely communicate.

Prepare presentation slides on the security solution you would recommend. Show why your solution provides the best level of security. Assess the cost and the required resources of your solution.