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    Routing Protocols and Packet Forwarding Short Notes for GATE CS

    Routing Protocols and Packet Forwarding short notes for GATE CS: 2 study cards covering concepts, formulas, shortcuts and exam traps, plus solved practice que

    routing protocols and packet forwarding short notes

    Summary: Longest Prefix Match Checklist

    Final Revision Checklist

    Matching Condition (IP) AND (Mask) == Prefix
    Tie-Breaker Largest wins
    Default Route 0.0.0.0 / 0 (Lowest priority)
    Binary Conversion Always use 8-bit for /17 to /30
    No Match & No Default DROP PACKET

    Final Revision Checklist

    Final Revision Checklist

    [ ] DV Core: (Bellman-Ford).
    [ ] DV Flaw: Count-to-infinity (bad news travels slowly).
    [ ] DV Fixes: Split Horizon, Poison Reverse (mitigates 2-node loops).
    [ ] LS Core: Flood LSPs Build global graph Run Dijkstra.
    [ ] Dijkstra Rule: Always pick the node with the minimum not yet in , then update its neighbors.
    [ ] Protocol Mapping: RIP = DV (Hop count, max 15). OSPF = LS (Bandwidth cost, hierarchical).
    [ ] Complexity: LS has higher message overhead () but faster, more robust convergence than DV.
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    Routing Protocols and Packet Forwarding Short Notes for GATE CS

    Routing Protocols and Packet Forwarding short notes for GATE CS: 2 study cards covering concepts, formulas, shortcuts and exam traps, plus solved practice questions.

    Summary: Longest Prefix Match Checklist

    Final Revision Checklist

    Matching Condition (IP) AND (Mask) == Prefix
    Tie-Breaker Largest wins
    Default Route 0.0.0.0 / 0 (Lowest priority)
    Binary Conversion Always use 8-bit for /17 to /30
    No Match & No Default DROP PACKET

    Final Revision Checklist

    Final Revision Checklist

    [ ] DV Core: (Bellman-Ford).
    [ ] DV Flaw: Count-to-infinity (bad news travels slowly).
    [ ] DV Fixes: Split Horizon, Poison Reverse (mitigates 2-node loops).
    [ ] LS Core: Flood LSPs Build global graph Run Dijkstra.
    [ ] Dijkstra Rule: Always pick the node with the minimum not yet in , then update its neighbors.
    [ ] Protocol Mapping: RIP = DV (Hop count, max 15). OSPF = LS (Bandwidth cost, hierarchical).
    [ ] Complexity: LS has higher message overhead () but faster, more robust convergence than DV.

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