Data Center Architect Free Sample Questions

Mapping a unique VNI to each VLAN provides the necessary Layer 2 extension across the fabric for the legacy cluster. Symmetric IRB (Integrated Routing and Bridging) ensures that traffic is routed optimally on both the ingress and egress VTEPs (leaf switches), which is critical for efficient east-west traffic patterns. This design contains the broadcast domain for each VLAN within its respective VNI, preventing broadcast storms from impacting the entire fabric.

The scenario describes a high volume of 'east-west' traffic (server-to-server). A key benefit of a spine-leaf architecture is its ability to handle this traffic pattern efficiently. The correct technical mapping is to design a fabric where the total bandwidth of the leaf switch uplinks to the spines is equal to (non-blocking) or slightly less than (low-oversubscription) the total bandwidth of the server-facing downlinks. This ensures that the high volume of inter-server communication does not create a bottleneck.

VSX (Virtual Switching Extension) directly addresses business continuity by creating a redundant, active-active gateway for servers and enabling in-service software upgrades, which minimizes downtime. This is a key business benefit.

Automation capabilities, often managed through tools like Aruba Central or NetEdit, directly impact ROI by lowering OpEx. Reduced manual configuration time and fewer errors lead to significant cost savings over the life of the network.

This question directly addresses the core tenets of HIPAA compliance: data segmentation and access control. Understanding the current state of how Electronic Protected Health Information (ePHI) is isolated and who can access it is fundamental to designing a new network that meets or exceeds those regulatory requirements. It opens the discussion about micro-segmentation, VRFs, and role-based access control.

Using a unique AS for each leaf pair in an eBGP underlay is a common best practice. Since all leaf pairs peer with the same spine AS, they can all use identical BGP configurations (neighbor IPs will differ, but policies, timers, etc., can be templated). The standard loop prevention mechanism of eBGP (AS_PATH) inherently prevents routes learned from one leaf from being advertised back down to another leaf via the spines, which simplifies the design and removes the need for complex route-maps or peer groups that would be required in other topologies.

Distributed Firewall Policies (DFP) on HPE Aruba CX switches enable stateful, policy-based traffic filtering at the VTEP (leaf switch) level. This allows for the creation of micro-segmentation policies that can isolate workloads down to the individual VM or container level, regardless of their VLAN or subnet. It is the core technology for implementing a zero-trust model for east-west traffic within the data center fabric.

This is false. A best-practice VSX design separates the keepalive traffic from the ISL. The ISL is a high-bandwidth link (or LAG) designed to carry data plane traffic and state synchronization between the VSX peers. The keepalive mechanism should use a separate, out-of-band connection (such as through management ports or a dedicated L3 link) to detect reachability between the peers and prevent split-brain scenarios. Mixing keepalives with production data on the ISL is not recommended.

The 'Prepare and Present the Solution' phase encompasses the creation of all necessary design documentation and the communication of that design. This includes the detailed technical documents (BOM, diagrams, IP schema) and the presentation materials required to explain the solution, justify its value, and gain approval from various stakeholders.

A spine-leaf (or Clos) fabric is inherently designed for modern data centers. Every leaf switch connects to every spine switch, meaning that traffic between any two servers (connected to different leaf switches) always traverses one leaf and one spine. This fixed, two-hop path provides predictable low latency. The architecture scales linearly by adding more spine switches to increase inter-leaf bandwidth or adding more leaf switches to increase server port capacity.

The requirement for scalable L3 connectivity directly to pods (which are often in their own subnets) is best addressed by EVPN Type-5 routes. Unlike Type-2 routes which advertise individual host /32 routes, Type-5 routes advertise IP prefixes (subnets). This allows the fabric to efficiently route traffic between different microservices without relying on L2 adjacency, perfectly aligning with the needs of a modern, routed container networking model and providing better scalability.