Date Added: Jan 2011
In a computer network, network security is accomplished using elements like firewalls, hosts, servers, routers, intrusion detection systems, and honey pots. These network elements need to know the nature or anomaly of the worm in priori to detect the attack. Modern day viruses like Code red, Sapphire and Nimda spread very fast. For example, Sapphire can double its size and infect more than 90% of the vulnerable hosts within 10 minutes. Therefore it is impractical if not impossible for human mediated responses to these modern day fast spreading viruses. Several epidemic studies show that automatic tracking of resource usage and control is an effective method in containing the damage.