The world has become a small village, thanks to the latest communication technologies. Reliance on the latest communication technologies in governments, multi-national organizations and lately, nuclear power plants opened the door to increase the potential cyber-threats. Cyber-attacks are also witnessing a dramatic increase all over the globe. The upcoming war between nations will be moved to cyber space instead of being on their lands. In the near future, cyber wars will have the upper hand of power against the enemies. To claim the points, we will have to find out effective techniques to combat cyber-attacks thereby, decreasing the percentage to the minimum. These kinds of threats and attacks cannot be prevented purely one hundred per cent as intruder is always unknown and unexpected; therefore, the intruder may be your neighbour or even from a different location or from another continent. Potential targets could be multi-national organizations, private agencies, ministries andgovernments or even individuals.