Final answer:
Antivirus software, user education, and enforced login/logoff hours are the most effective measures to prevent security breaches on a network.
Step-by-step explanation:
The most effective ways to prevent security breaches on a network are:
- Antivirus software: This software helps detect and remove malware, viruses, and other malicious software that can compromise network security.
- User education: Educating network users about best practices, such as creating strong passwords, being cautious of phishing attempts, and avoiding suspicious links, can significantly reduce the risk of security breaches.
- Enforced login/logoff hours: Setting specific hours for users to log in and log off can help prevent unauthorized access during off-hours.