The number of attacks against large computer systems is

currently growing at a rapid pace. Despite the best efforts

of security analysts, large organizations are having trouble

keeping on top of the current state of their networks. In

this paper, we describe a tool called NVisionIP that is designed

to increase the security analyst’s situational awareness.

As humans are inherently visual beings, NVisionIP

uses a graphical representation of a class-B network to allow

analysts to quickly visualize the current state of their

network. We present an overview of NVisionIP along with a

discussion of various types of security-related scenarios that

it can be used to detect.