Key Points Checks whether data integrity has been affected Used before correction or retransmission Common in communication and storage systems Often implemented with parity, checksums, or CRCs Used in communication protocols, storage systems, file formats, and safety-critical data paths Definition…
Key Points Uses outputs to understand internal state Common in operations and software systems Depends on metrics, logs, and traces Supports troubleshooting and analysis Enables operators and tools to reconstruct behavior and identify anomalies Definition Observability is the ability to…
Key Points Uses virtual circuits for logical paths through shared provider networks Historically important in enterprise WANs and carrier networks Carries frames across shared networks without dedicated physical circuits Predecessor to modern Ethernet-based and MPLS-based transport systems Emphasized simple frame…
Key Points Represents maximum theoretical service rate under favorable conditions Used in carrier and access planning May exceed committed or average rates Important for burst capacity analysis Often misunderstood as a guaranteed or typical rate Definition Peak Information Rate is…
Key Points Supports remote command beyond direct visibility Used for vehicles, drones, and space systems Relies on relay or long-range communications Enables operations at distances exceeding direct radio or visual range Tradeoffs include greater operational reach versus higher latency Requires…
Key Points Depends on distance and medium velocity Affects latency in communication and control systems Important in wired, wireless, and satellite links Can limit timing performance and synchronization Sets an unavoidable lower bound on how quickly information can move between…
Key Points Represents IP network prefixes Used in IPv4 and IPv6 addressing Supports subnet planning and routing Compact alternative to older mask notation Definition CIDR Notation is a compact way to represent IP address prefixes and network masks using a…
Key Points Causes attenuation in RF propagation Depends on frequency and atmospheric composition Relevant in satellite and microwave links Can reduce link margin and coverage Frequency-dependent absorption peaks (oxygen and water vapor) Increases with path length and atmospheric density Distinct…
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 Targets remote or sparsely populated areas Often uses mixed access technologies including fiber, fixed wireless, or satellite Important for digital inclusion and service reach Used in regional access planning, fixed wireless deployment, fiber expansion, and satellite-enabled service models…
