Layer 2 and Layer 3 Strategies JN0-281 Practice Questions (Page 6)

Questions 26–30

1. 26application · medium

   A data center network team is deciding between OSPF and EBGP for their new IP fabric underlay. They have a requirement to support a large number of leaf switches (over 100) and want to minimize the number of routing protocol instances. They also want to avoid the complexity of a separate IGP. Which protocol and design should they choose?

   • AEBGP with the same ASN on all leaf switches
   • BOSPF with a different area per leaf switch
   • COSPF with all switches in a single area
   • DEBGP with a private ASN per leaf switch
   Reveal Solution Discussion Select an answer first
2. 27foundation · easy

   What is a scalability consideration when choosing between Layer 2 and Layer 3 in a data center?

   • ALayer 2 and Layer 3 scale equally well.
   • BLayer 3 networks cannot scale beyond a single switch.
   • CLayer 3 networks scale better because they use routing protocols and avoid broadcast domains.
   • DLayer 2 networks scale better because they do not require IP addressing.
   Reveal Solution Discussion Select an answer first
4. 28foundation · easy

   What is a trade-off between Layer 2 and Layer 3 strategies in data center design?

   • ALayer 3 is simpler to operate than Layer 2.
   • BLayer 2 provides larger fault domains, while Layer 3 provides smaller fault domains.
   • CLayer 2 is more scalable than Layer 3.
   • DLayer 2 requires more IP addresses than Layer 3.
   Reveal Solution Discussion Select an answer first
5. 29application · medium

   A data center has a spine-and-leaf fabric with four spine switches and eight leaf switches. Each leaf has an equal-cost path to every spine. The network team wants to ensure that traffic is distributed across all available paths to maximize throughput. What must be configured on the leaf switches to achieve this?

   • AEnable ECMP and ensure all paths have the same metric
   • BEnable STP on the leaf switches
   • CUse BGP with different AS paths to each spine
   • DConfigure a static route with a lower preference to one spine
   Reveal Solution Discussion Select an answer first
6. 30foundation · easy

   What is the purpose of MC-LAG (Multi-Chassis Link Aggregation Group) in a data center?

   • ATo replace the need for any Layer 3 routing in the data center.
   • BTo encrypt all traffic between switches.
   • CTo provide redundancy and loop-free Layer 2 topologies by allowing a device to connect to two switches as if they were one.
   • DTo allow a single switch to be split into multiple virtual switches.
   Reveal Solution Discussion Select an answer first