IP Fabric Architectures (Spine/Leaf) JN0-281 Practice Questions (Page 1)

Questions 1–5

1. 1foundation · easy

   What is the primary purpose of the spine-leaf architecture in a data center?

   • ATo eliminate the need for routing protocols in the data center.
   • BTo provide a scalable, low-latency, and predictable network fabric for east-west traffic.
   • CTo reduce the number of switches required in the data center.
   • DTo simplify network management by using a single layer of switches.
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2. 2expert · hard

   A company is deciding between a traditional three-tier network and a spine-leaf fabric. The primary workload is a mix of east-west traffic (server-to-server) and north-south traffic (to the internet). The network team has a limited budget and wants to minimize the total cost of ownership (TCO) over 5 years, including operational overhead. Which factor most strongly favors the spine-leaf design?

   • ASpine-leaf eliminates the need for firewalls and load balancers, reducing capital expenses.
   • BSpine-leaf allows for incremental scaling by adding spines or leaves, avoiding large, disruptive upgrades to core switches.
   • CSpine-leaf uses a simpler routing protocol, which reduces the need for specialized network engineers.
   • DSpine-leaf requires fewer switches than a three-tier design for the same number of servers.
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4. 3foundation · easy

   Why does every leaf switch connect to every spine switch in a spine-leaf fabric?

   • ATo provide multiple equal-cost paths between any two leaves, enabling load balancing and redundancy.
   • BTo allow leaf switches to communicate directly with each other without using spines.
   • CTo reduce the number of ports required on each spine switch.
   • DTo ensure that each leaf has a backup path in case its primary spine fails.
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5. 4application · medium

   A cloud provider is deploying a spine-leaf fabric to support multiple tenants. They plan to use VXLAN to provide network isolation. The underlay network will use BGP for routing. In this design, what is the primary role of the spine switches?

   • ASpine switches are responsible for enforcing tenant security policies and filtering traffic based on VXLAN VNI.
   • BSpine switches act as route reflectors for the underlay BGP sessions and forward VXLAN-encapsulated packets based on the outer IP header.
   • CSpine switches terminate VXLAN tunnels and perform all tenant MAC address learning.
   • DSpine switches must be configured with all tenant VLANs to allow inter-VLAN routing.
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6. 5foundation · easy

   How does adding a new spine switch to a spine-leaf fabric affect the existing network?

   • AIt requires replacing all existing spines to maintain consistency.
   • BIt increases the number of paths available between leaves, improving bandwidth and redundancy.
   • CIt reduces the number of paths available because the new spine must share bandwidth.
   • DIt requires reconfiguring all existing leaf switches to add the new spine.
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