System Core Network

High Availability

Key Points Focuses on minimizing downtime and maintaining service accessibility Uses redundancy, monitoring, and failover mechanisms Common in cloud systems, telecom, enterprise IT, and critical infrastructure Supports service continuity and operational resilience goals Involves tradeoffs between uptime, cost, and operational…

RIP-NG

Key Points – Extends RIP concepts to IPv6 – Uses distance-vector routing behavior – Supports internal route exchange in IPv6 networks – Common in legacy or small-scale IPv6 environments – Suited to smaller or legacy deployments where operational simplicity is…

Route Poisoning

Key Points – Marks failed routes as unusable – Used in distance-vector routing – Helps prevent routing loops – Supports faster recovery after topology changes Definition Route Poisoning is a routing technique that advertises a failed route with an invalid…

Bellman Ford Algorithm

Key Points Finds shortest paths from a source node to all other nodes Supports negative edge weights in graphs Detects negative cycles within the graph structure Used in graph analysis, routing research, and network optimization Higher computational cost than algorithms…

MPLS

Key Points – Uses labels to forward traffic efficiently across networks – Commonly used in carrier and enterprise WAN environments – Supports traffic engineering and quality-of-service mechanisms – Often associated with managed WAN and VPN services – Can coexist with…

OSI Model

Key Points – Organizes networking into seven layers – Used as a reference model in networking – Helps separate functions and responsibilities – Common in education and troubleshooting – Provides abstraction for reasoning about communication problems Definition OSI Model is…

Route Reflection

Key Points – Used in BGP route distribution to scale internal routing – Reduces operational burden of full-mesh peering – Common in large internal BGP designs – Supports scalable route propagation – Route reflector receives routes from clients and reflects…

Redundancy Scheme

Key Points – Provides alternate paths or components – Used to improve availability and resilience – Can be active-active or active-standby – Applied in networks, control systems, and infrastructure – Requires deliberate planning for failure domains – Common forms include…

Feeder Link

Key Points Connects access side to gateway or core side Carries aggregated traffic rather than direct user traffic Common in satellite and access architectures Handles capacity from many users or beams before reaching the core Operates between Edge Compute aggregation…

Deep Packet Inspection

Key Points Inspection of packet contents beyond superficial header fields Parses deeper protocol layers and application-level content Supports security filtering, traffic classification, and policy enforcement Used in network security appliances, telecom networks, and content inspection systems Can identify protocols and…