15. Let’s say you are systems administrator for a hospital’s network. Keep in mind that as system administrator, your job is to provide the correct level of accessibility to authorized users while denying access to those who lack authorization. What are the top five policies that you would implement? How would you enforce compliance with these policies? How would you educate your users to convince them to adhere to your policies? Solution The policies that system administrator use to provide the correct level of accessibility to authorized users while denying access to unauthorized users are- 1. Using antivirus software and running them regularly to protect systems from attack by malicious softwares. 2. Using firewalls to maintain access control based on sender\'s and reciever\'s ip addresses. 3. By providing Login system policy to ensure authorized access to system by individuals (using login ID and passwords). 4. Using high level encryption techniques to secure access of information on transit between two users. 5. By monitoring network communication. These policies can be enforced by system administrator by using distributed operating system. Because DO/S works on the property of global control of all assets. Users can be provided with individual login and password as unauthorized access may lead to breach in security of hospital\'s information. As security breach in Hospital\'s information may lead to adverse effects like- breach in information of patients, their diseases, medicines prescribed and many more..