Parallel Redundancy Protocol (PRP) is a multiple-fault tolerant (depending on topology) standard defined in
IEC 62439-3 and is adopted in the ODVA, Inc. EtherNet/IP specification. PRP technology creates seamless
network redundancy by allowing PRP enabled IACS devices to send duplicate Ethernet frames over two
independent Local Area Networks (LANs). This white paper is an overview of use cases for designing and deploying PRP technology with redundant network infrastructure across plant-wide IACS applications.