An Overview of Intrusion Detection System ( IDS ) along with its Commonly Used Techniques and Classifications

The area of intrusion detection is the central concept in overall network and computer security architecture. It is an important technology in business sector as well as in research area. By monitoring the computer and network resources, Intrusion Detection System (IDS) detects any of the misuse or unauthorized access which is basically an attack to these resources. Then it alerts and informs administrator for occurrence of an intrusion. Several methods can be used to detect an intrusion. In this paper, we have discussed the introduction of intrusion detection system, its types and then different techniques that are commonly used. This paper will be helpful for the new researchers who want to know the basic knowledge of intrusion detection systems. It will help them to understand what intrusion detection is and what are the techniques commonly used for it.