NVAT - Overview

Architecture

Impact Analysis
bullet Component Impact Factor (CIF) - The CIF characterizes and quantifies the impact of the attack or fault on a single network component such as client, server, or router. For example, the CIF on a client for a given Fault Scenario (FSk) can be defined as the ratio between the decrease in data transfer rate due to a fault scenario FSk and the maximum decrease in data transfer rate. The maximum decrease is defined based on the reduction level required to make the component to operate in an unacceptable operational state (vulnerable state). The red line in the figure shows the threshold to differentiate the node's normal operation state from unacceptable operation state.

bullet System Impact Factor (SIF) - This identifies the impact of the attacks/faults on a whole network or a sub network. For any given fault/attack, the SIF is obtained by evaluating the weighted impact factors of all the individual network components. The following figures show the SIF for core routers and total clients under the multiple network failures scenario.