CRB Versus ERB JN0-460 Practice Questions (Page 1)

Questions 1–5

1. 1foundation · easy

   What is a scalability advantage of Edge-Routed Bridging (ERB) compared to Centrally Routed Bridging (CRB)?

   • AERB eliminates the need for a spine, simplifying scaling.
   • BERB allows for unlimited leaf switches without any routing table growth.
   • CERB reduces the routing table size on the spine, improving scalability.
   • DERB requires fewer IP addresses for the underlay.
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2. 2foundation · easy

   What is a key benefit of Edge-Routed Bridging (ERB) regarding spine dependency?

   • AIt requires the spine to perform all routing.
   • BIt increases the number of routing hops to the spine.
   • CIt reduces the dependency on the spine for routing decisions.
   • DIt eliminates the need for a spine layer entirely.
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4. 3foundation · easy

   Which statement correctly describes the role of the leaf layer in a Centrally Routed Bridging (CRB) architecture?

   • ALeaf switches perform routing between VLANs.
   • BLeaf switches perform only bridging functions.
   • CLeaf switches act as route reflectors for the fabric.
   • DLeaf switches provide the default gateway for hosts.
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5. 4application · medium

   A large enterprise is designing a campus fabric with 200 leaf devices. The network team is concerned about the size of the routing table on each device and the convergence time in case of a link failure. They expect most traffic to be north-south to a central data center. Which architecture should they select to minimize routing table size on the leaf devices?

   • ACRB, because routing is distributed to the leaves, which reduces the routing table size on each leaf.
   • BCRB, because leaf devices only need to know the local subnets and a default route to the spine, keeping the routing table small.
   • CERB, because each leaf only needs routes for its own locally attached subnets, minimizing the routing table.
   • DERB, because it uses a default route to the spine, which reduces the routing table size on the leaves.
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6. 5application · medium

   A campus fabric is being designed with a mix of east-west and north-south traffic. The network team wants to ensure that east-west traffic between servers on different leaves is as fast as possible. Which architecture should they choose?

   • ACRB, because it routes at the spine, which provides a direct path between leaves.
   • BERB, because it allows east-west traffic between leaves to be routed locally without traversing the spine.
   • CERB, because it routes at the leaf, but traffic between different leaves still needs to traverse the spine.
   • DCRB, because it reduces the number of hops for east-west traffic by routing at the leaf.
   Reveal Solution Discussion Select an answer first