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Difficulty: EasyRouting Concepts and Dynamic Routing Protocols

Which of the following operational features are primary characteristics of link-state routing protocols, such as OSPF? (Select TWO)

  1. Routers build a complete topology database representing the map of the network area.Answer
  2. Routers exchange triggered updates known as Link-State Advertisements (LSAs) when network changes occur.Answer
  3. C
    Routers periodically send their full routing table to directly connected neighbors.
  4. D
    Path selection relies exclusively on hop count as the metric for determining the shortest path.

Answer

The primary operational characteristics of link-state routing protocols are building a complete network area topology map and issuing triggered Link-State Advertisements (LSAs) upon network changes.
Link-state dynamic routing protocols function by giving every participating router full visibility into the area topology database and communicating state changes immediately via triggered Link-State Advertisements (LSAs).

Step-by-Step Solution

1
Analyze protocol operational mechanics for link-state dynamic routing.
Link-state protocols maintain full topology awareness across a routing area and update peers using event-driven LSAs.
Link-state algorithms require routers to know the complete graph of the network before running the Shortest Path First (SPF) calculation.
2
Differentiate link-state characteristics from distance-vector mechanisms.
Periodic full-table updates and strict hop-count metrics belong to distance-vector protocols.
Distance-vector routers route 'by rumor' without a complete topology map, relying on neighbor periodic announcements and hop counts.

Key Concept

Link-State Routing Protocol Operational Characteristics
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Topics

Routing Concepts and Dynamic Routing Protocols

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