Network Security on the Intrusion Detection System Level

In the present security is an important factor of the network protection. Not only intrusion detection system but also intrusion prevention systems are created in order to the system failure due to a deliberate harm or a system intrusion is not occurred. The article deals with an analysis of the intrusion detection systems. The main goal is to point out an advantages and disadvantages of these systems and provide the overview of the possibilities which these systems offer. The article asset is the possibility to implement such a system to the network in its separate levels of the ISO/OSI layered model on the Department of Computers and Informatics of the Faculty of Electrotechnical Engineering and Informatics of the Technical University of Kosice. The main asset should be the network protection by using intrusion detection systems