Contemporary society has increased dependence on computers and computer networks, and the increasing popularity of mobile computing, has raised several issues of computer security. But despite the proliferation of high drug experts, is a sustainable and comprehensive solution to security issues are still difficult to understand, and people continue to suffer at the hands of cyber criminals, vandals and hackers. This authoritative guide to explore the Computer Network Security computer network infrastructure and security protocol design flaws, and discuss current security solutions and best practices in both fixed and mobile networks. Further explore the security threats and vulnerabilities in the current network infrastructure and protocols, and outlines the current security efforts. Increasing awareness of security issues in cyberspace, and more specifically, computer network security ? Exploring the role of legislation and law enforcement in maintaining computers and computer network security ? Alert the reader to the problem of daunting security increasingly popular in the mobile network system ? It is also a rich resource for practitioners, and professionals who wish to gain understanding of computer network infrastructure and network information security. Dr Kizza Joseph Migga also write Computer Network Security and Ethical and Social Issues in the Information Age. Key Topics: Network Vulnerabilities Hostile Scripts Security Assessment Authentication Cryptography Computer and Network Forensics Network Security Protocol Security in Wireless and Sensor Networks