3.1 Resilient, Scalable, and Secure Modular Networks, Covering Traditional and Software-Defined Architectures, Considering: 400-007 Practice Questions (Page 3)

Questions 11–15

1. 11expert · hard

   A financial trading firm is designing a new network for its high-frequency trading (HFT) platform. The platform requires deterministic sub-100-microsecond latency between trading servers and the market data feed. The firm is considering two designs: a traditional three-tier architecture with a pair of core switches, and a spine-and-leaf fabric using VXLAN. The firm has a limited budget and cannot replace all existing switches. The network architect must choose a design that meets the latency requirement while minimizing cost. Which design should the architect recommend?

   • AUse the existing three-tier architecture and optimize the path by placing trading servers on the same access switch as the market data feed.
   • BImplement a spine-and-leaf fabric using the existing switches as leaf nodes and adding new spine switches, with VXLAN for segmentation.
   • CUse a software-defined network (SDN) controller to dynamically route HFT traffic over the least-congested path in the existing network.
   • DUse a hybrid design: keep the existing core/distribution for general traffic, and add a dedicated low-latency path for HFT traffic using direct connections between trading servers and the market data feed.
   Reveal Solution Discussion Select an answer first
2. 12foundation · easy

   An organization wants to deploy new branch routers in minutes instead of days. Which automation goal does this represent?

   • AProvisioning speed
   • BConsistency
   • CCompliance
   • DError reduction
   Reveal Solution Discussion Select an answer first
4. 13foundation · easy

   When designing a network for a small enterprise, the design team notes that the existing IT staff has expertise in Cisco IOS but not in new SD-WAN technologies. Which type of constraint does this represent?

   • AOperational constraint
   • BBusiness constraint
   • CApplication constraint
   • DTechnical constraint
   Reveal Solution Discussion Select an answer first
5. 14application · medium

   A retail company is migrating its data center from a legacy three-tier architecture to a software-defined data center using Cisco ACI. The migration must be completed without any downtime, and the company has a low risk tolerance. The current network uses a mix of VLANs and VRFs to segment traffic. Which migration strategy best meets these requirements?

   • AMigrate the core first, then the access, and finally the workloads.
   • BUse a network virtualization overlay on the existing hardware to simulate ACI before migrating.
   • CPerform a big-bang cutover over a weekend, moving all workloads at once.
   • DBuild the ACI fabric in parallel and migrate workloads gradually, using a Layer 2 extension to maintain connectivity.
   Reveal Solution Discussion Select an answer first
6. 15application · medium

   A healthcare provider is designing a network for a new telemedicine service that transmits high-definition video between clinics and a central data center. The service requires low latency and high bandwidth, and it must be highly available. The provider has a limited budget and cannot afford redundant WAN links at every clinic. Which design approach best meets the application requirements within the budget?

   • AUse a single high-bandwidth WAN link at each clinic and rely on the service provider's SLA for availability.
   • BUse a single WAN link at smaller clinics and redundant links at larger clinics that handle more traffic.
   • CImplement redundant WAN links at all clinics, using active/standby failover to ensure availability.
   • DDeploy a WAN optimization solution to reduce bandwidth needs and allow the use of a single, lower-cost link.
   Reveal Solution Discussion Select an answer first