Key Points Central hub connects many endpoints Reduces direct interconnection complexity Common in networking and logistics Creates a central dependency Hub capacity and latency are key constraints Single point of failure risk if hub redundancy is not designed Definition Hub…
Key Points Protects payload content from unauthorized reading Used in secure communications and transport Often paired with key management and access control Combines data transport with information security Used in satcom, secure networking, and protected data transport Encryption helps preserve…
Key Points Inactive until failover occurs Lowest steady-state resource cost Slowest recovery among standby modes Dormant backup mode Definition Cold Standby System is a backup system that remains inactive until it is needed, enabling lower steady-state resource consumption while accepting…
Key Points State Estimation is defined for network or system use. Inference of hidden or internal system state from available data. Used in operational and control contexts. Works by combining observations with a model to estimate values that are not…
Key Points Connects bridge operations with network services Supports navigation, reporting, and data exchange Requires security and segregation controls Preserves safety boundaries and operational integrity Enables data sharing while preventing network interference with bridge-critical functions Definition Bridge to Network Integration…
Key Points Holdover Timing is defined for network or system use Timing continuity when an external reference is lost Used across network and system environments Holdover quality depends on oscillator stability and the duration of reference loss Cross-industry relevance is…
Key Points Suppresses rapid route churn after failure Used in distance-vector routing protocols Helps prevent transient loops and route flapping Delays acceptance of potentially unstable updates Allows network time to settle after disruption before accepting new routing information Definition Holddown…
Key Points Error-control method using redundant coding for receiver-side correction Works by encoding data with additional parity or check information Allows receiver to reconstruct missing or corrupted bits without retransmission Used in satellite communications, wireless systems, broadcast transport, and other…
Key Points Combines telemetry, tracking, and command functions Used in satellite operations and mission control Supports spacecraft monitoring and control Often managed from ground stations or operations centers Essential for safe and effective spacecraft operation Closes the loop between ground…
Key Points Designed for protective action rather than normal control Uses sensors, logic solvers, and final elements to detect hazardous conditions Initiates protective response before risk becomes unacceptable Distinct from normal process control because its purpose is protection Common in…
