Network Security Principles and Practices

The Need for Intrusion Detection

The need for intrusion detection is based on the increasing number of threats faced by the computer networks in today's world. Here are some of the fundamental reasons why so many attacks are being launched on computer networks:

• Computer networks are used to carry information that is valuable not only to the intended receiver but can also be valuable to anyone else who gets his or her hands on it. Therefore, computer networks are an important source of information theft. This has led to an increase in network security breaches.

• The World Wide Web has become a very common way of delivering information to the masses. Hackers find it useful to demonstrate their beliefs and stage virtual demonstrations by attacking ...