Network security: what and how

As we saw in this moment, the Internet has grown and grown to reach several million units of computers that are connected in various parts of the world. From day to day information is also contained in the Internet network is more complete, accurate, and important. . Information has become such a valuable asset that needs to get a more specific treatment. Beside that, the progress made in developing a computer operating system itself and utulitasnya had so far where the level of performance, reliability and flexibility of software is becoming the main criteria in the process of software development. With more and more important and valuable information and supported by the progress of software development, certainly attract the breaker (hackers) and intruder (intruder) to continue experimenting to find and use any existing weaknesses of the system configuration information that has been established

Departing from the above facts, there is a concept which is more often referred to as Network Security. Initially, this concept explains more about security (security) of a computer network system that connects to the Internet against threats and harassment directed toward the system. Coverage of these concepts is becoming increasingly widespread, so at this time not only talking about computer network security problems alone, but rather lead to security problems in the global information network system. Several countries in Europe and America have made even one of Network Security becomes a central point of attention of the military parties respectively.

Actually, this network security problem arises from the local computer network connectivity we have with the wide-area network (like internet). So, during our local network computer is not connected to the wide-area network, network security problem is not so important. But this does not mean giving the sense that joining the wide-area network is a matter of 'scary' and full of danger. Network Security is only describe the possibilities that will arise from our local computer network connectivity with a wide-area network.

In general, there are 3 (three) of keywords in the concept of Network Security, namely:

* The risk / hazard rate,
* Threat, and
* System fragility (vulnerability)