Resumen
This article focuses on the cyber attacks and its understanding on networked computer resources. Cyber attacks are becoming sophisticated, attackers routinely use attack design toolkits, apply stealth techniques and target an increasing spectrum of protocols and applications. Cyber attackers are learning to actively evade countermeasures. Moreover, attackers have the advantage because they can carefully plan and choose the best time and the weakest points at which to attack. To effectively manage all the defensive elements, one needs strategy and tactics. To develop strategy and tactics hypotheses based on analogy has to be accumulated. To achieve a viable cyber defense capability, many advances in both science and technology are needed. Sound cyber defense policy depends on understanding the problem, its solution and the nature of cyber conflicts from economics, behavioral and political perspectives. Computer security has its roots in the requirement for multilevel security processing. The need continues for controlled sharing among groups of differing trust relationships