The major goal of this article is to know about network risk assessment. An engineer performing a network risk assessment does a infiltration experiment to locate vulnerabilities, or weak points, along the perimeter and inside. Any one or more vulnerabilities can serve as an unlock gateway for an intruder to go during and filch data, probably exploiting it soon after. In order to locate these vulnerabilities in a network risk assessment, the engineer fundamentally acts similar to a hacker, albeit an ethical one. Employing these ethical hacking techniques, a network engineer simulates a hit to avoid safety and enter a method.