Routing
Routing chooses paths between networks and forwards packets using routing tables.
Updated: 2026-03-05
Definition
Routing is how packets move between different IP networks via routers/L3 devices.
Routes can be static or learned dynamically through routing protocols.
Key points
- Uses routing table to forward traffic
- Static routes vs dynamic routing protocols
- Default route sends unknown traffic to a gateway
Common mistakes
- Missing default route leading to 'partial' connectivity.
- Overlapping subnets causing unpredictable routing.
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