Free Cisco 300-160 Exam Practice Questions & Explanations
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A network architect is designing connectivity between two data centers located 40 km apart to support synchronous storage replication and stretched Layer 2 workloads for a disaster recovery solution. Which technology is most appropriate to extend Layer 2 connectivity between the two sites while providing loop prevention and multipathing across the DCI links?
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A storage architect is designing a Fibre Channel SAN for a mission-critical database cluster. The design requires that a single link failure between a host and the SAN fabric must not cause loss of storage connectivity. The architect proposes connecting each host with a single HBA port to one fabric switch, relying on multipathing software alone to handle failures.
Is this design sufficient to meet the stated availability requirement?
The design is insufficient because a single HBA port connected to a single fabric switch creates a single point of failure; if that HBA, cable, or switch fails, connectivity is lost entirely regardless of multipathing software, since multipathing requires at least two independent physical paths (typically dual HBAs across two separate fabrics, SAN A and SAN B) to provide redundancy. A properly redundant Fibre Channel SAN design requires dual-fabric, dual-HBA connectivity.
A data center architect is designing the physical infrastructure for a new facility that must support high-density compute pods with strict power and cooling constraints. The design also needs to accommodate future scalability without major re-cabling. Which design approach best satisfies these infrastructure requirements?
A modular pod-based design with structured cabling and hot/cold aisle containment allows for predictable airflow management, efficient cooling, and incremental scalability as compute density grows. Scalable PDUs support future power growth without re-engineering the entire facility. Monolithic fixed-power designs and layouts without containment strategies lead to hotspots, inefficient cooling, and difficulty scaling, which violates data center infrastructure design best practices.
A financial services company is designing a new data center fabric using Cisco Nexus switches in a spine-leaf topology. The design must support a scalable Layer 2 overlay across the fabric while minimizing flooding and enabling efficient host mobility across racks. Which technology should be recommended as the control plane for this overlay?
VXLAN with BGP EVPN provides a scalable control plane for MAC/IP learning, reduces flooding through proactive route distribution, and supports host mobility across a spine-leaf fabric, making it the standard modern design choice for large Layer 2 overlays. STP alone does not scale well in spine-leaf topologies and creates blocked links. vPC only addresses dual-homing, not overlay scalability. FabricPath is a legacy technology largely superseded by VXLAN EVPN in current Cisco data center designs.