OSI protocols are a family of standards for information exchange. These were developed and designed by the International Organization of Standardization (ISO). In 1977 the ISO model was introduced, which consisted of seven different layers. This model has been criticized because of its technicality and limited features. Each layer of the ISO model...
Computers become part of a zombie network through malicious software (malware) that is unknowingly installed by users or automatically installed through a security network's back door, or by exploiting Web browser vulnerabilities. The malware leaves specified networking ports open, allowing computer access by outside users. Zombie networks run similar types of malware that may be multiple networks operated by different criminal entities (cyber or otherwise).
Types of attacks perpetrated by a zombie network include denial of service attacks, adware, spyware, spam and click fraud.
The following steps, or a variation, are used to create zombie networks:
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