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Difficulty: MediumRouting Concepts and Dynamic Routing Protocols

Match each dynamic routing protocol or routing concept to its correct characteristic or functional definition.

  • Open Shortest Path First (OSPF)Link-state IGP using Dijkstra's algorithm and a cost metric based on reference bandwidth
  • Border Gateway Protocol (BGP)Path-vector EGP that makes routing decisions based on autonomous system path and policy attributes
  • Routing Information Protocol version 2 (RIPv2)Distance-vector IGP using hop count (maximum 15) as its metric with 30-second periodic updates
  • Administrative Distance (AD)Trustworthiness metric ranging from 0 to 255 used by routers to rank route sources

Answer

Open Shortest Path First (OSPF) pairs with Link-state IGP using Dijkstra's algorithm and a cost metric based on reference bandwidth. Border Gateway Protocol (BGP) pairs with Path-vector EGP that makes routing decisions based on autonomous system path and policy attributes. Routing Information Protocol version 2 (RIPv2) pairs with Distance-vector IGP using hop count (maximum 15) as its metric with 30-second periodic updates. Administrative Distance (AD) pairs with Trustworthiness metric ranging from 0 to 255 used by routers to rank route sources.
Each protocol and routing term is accurately aligned with its corresponding algorithm, metric structure, and administrative scope.

Step-by-Step Solution

1
Analyze OSPF operational attributes.
OSPF operates as a link-state Interior Gateway Protocol (IGP) using cost computed from interface bandwidth via the Dijkstra algorithm.
Link-state protocols build full topology maps before calculating shortest path trees.
2
Analyze BGP operational attributes.
BGP functions as a path-vector Exterior Gateway Protocol (EGP) routing between Autonomous Systems using AS-Path attributes.
Path-vector protocols prevent loops at an inter-domain scale without needing link-state maps of external systems.
3
Analyze RIPv2 operational attributes.
RIPv2 is a distance-vector protocol utilizing hop count as its primary metric with a 15-hop boundary.
Distance-vector routing relies on directional vectors and periodic table updates sent to directly connected neighbors.
4
Analyze Administrative Distance.
Administrative Distance is an integer ranking from 0 (most trusted) to 255 (untrusted) used when multiple protocols advertise an identical destination path.
Routers must select a single route source to install into the IP routing table when prefix lengths are equal.

Key Concept

Dynamic Routing Protocols and Path Selection Principles
Estimated Time:1m 30s
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Topics

Routing Concepts and Dynamic Routing Protocols

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