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• OPC-10000-1 – OPC Unified Architecture - Part 1: Overview and Concepts
  5.7.2 Discovery Services
  larger, more complex network, a Global Discovery Server (GDS) might be used to discover Servers across different network segments. The Client sends a Discovery request, and the Discovery Server responds ... their connection details. OPC UA defines three levels of dedicated Discovery Servers : Local Discover Servery (LDS) Local Discovery Server with multicast extension (LDS-ME) Global Discovery Server
• OPC-10000-2 – OPC Unified Architecture - Part 2: Security Model
  4.3.12 Rogue Local Discover Server
  Rogue Local Discover Server An attacker who builds a malicious Local Discover Server . The malicious Local Discover Server could direct Clients to incorrect Servers , lower the exposed security of listed