Key Points Scan Cycle Time is the duration of one controller input-read, logic-execute, output-update cycle Used in PLCs, industrial controllers, and automation systems Affects controller responsiveness and the maximum rate of control updates Constraints include program size, input and output…
Key Points Divides data into packets that can be routed independently Packets can take different paths through the network Foundation of IP networking and modern digital communications More flexible and scalable than dedicated circuit switching Enables shared infrastructure to carry…
Key Points Maintains orbital position and geometry over time Uses scheduled or on-demand maneuvers to counter drift and perturbations Relies on periodic corrections and control planning Essential for preserving satellite service continuity and mission effectiveness Constrained by propellant budget, maneuver…
Key Points Causes line-of-sight obstruction Common on vessels with tall superstructure elements Can reduce coverage and tracking quality Blockage can be intermittent as the vessel changes heading or motion Definition Antenna Blockage Superstructure is a vessel structure that obstructs an…
Key Points Transmission using a shared timing reference Sender and receiver coordinate via common clock or timing relationship Used in networking, telecom systems, serial links, and digital communications Requires timing accuracy and clock distribution Framing and timing consistency enable reliable…
Key Points Connects different networks or domains May translate protocols or addresses Used in telecom, cloud, and industrial systems Can be physical or logical Acts as a boundary element between separate communication domains Definition Gateway is a device, node, or…
Key Points Connects access layer to core or aggregation infrastructure Carries aggregated traffic from Edge Compute sites and access points Used in mobile networks, broadband systems, enterprise connectivity, and remote service architectures May use fiber, microwave, satellite, or other transport…
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 Management Plane separates management functions from forwarding and decision-making functions Provides interfaces and processes for operators or tools to manage system behavior Used in routers, switches, cloud systems, and operational platforms Requires secure, out-of-band reachability independent of user…
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…
