COMPOSITION METHOD AND COUNTERMEASURE COMMUNICATIONS NETWORK SYSTEM AGAINST CYBER SECURITY CONSIDERING THE DEFENSE-IN-DEPTH AND DIVERSITY OF INSTRUMENTATION AND CONTROL SYSTEM IN NUCLEAR POWER PLANT

摘要

PURPOSE: the method for communications network system and configuration, which correspond between the security configuration communication network of network, provides barrier layer by corresponding to internet security. ;CONSTITUTION: it is configured in a communication network in multiple defence layers. Firewall (250,260,270) layer of multiple blockings is set between. The network switch (211,221,231,241,242,243) central star topology. The network switch controls multiple barrier layers of the communication inside multiple barrier layers and communication node. ;The 2012 of copyright KIPO submissions