Part I: Introduction to Computer Network Security.- Computer Network Fundamentals.- Computer Network Security Fundamentals.- Part II: Security Issues and Challenges in the Traditional Computer Network.- Security Motives and Threats to Computer Networks.- Introduction to Computer Network Vulnerabilities.- Cyber Crimes and Hackers.- Scripting and Security in Computer Networks and Web Browsers.- Security Assessment, Analysis, and Assurance.- Part III: Dealing with Computer Network Security Challenges.- Disaster Management.- Access Control and Authorization.- Authentication.- Cryptography.- Firewalls.- System Intrusion Detection and Prevention.- Computer and Network Forensics.- Virus and Content Filtering.- Standardization and Security Criteria: Security Evaluation of Computer Products.- Computer Network Security Protocols.- Security in Wireless Networks and Devices.- Security in Sensor Networks.- Other Efforts to Secure Data in Computer Networks.- Part IV: Elastic Extension Beyond the Traditional Computer Network: Virtualization, Cloud Computing and Mobile Systems.- Cloud Computing and Related Security Issues.- Virtualization Security.- Mobile Systems and Corresponding Intractable Security Issues.- Part V: Securing the Last Frontiers - The Home Front.- Conquering the Last Frontier in the Digital Invasion: The Home Front.- Part VI: Hands-on Projects.- Projects.