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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Management, Orchestration and Operations | 10% | - Management architecture and tools
|
| Topic 2: Lossless and AI-Optimized Networking | 15% | - Advanced transport and optimization
|
| Topic 3: Data Center Network Architecture Design | 30% | - Requirements analysis and solution design
|
| Topic 4: Data Center Network Security and Policy | 20% | - Security architecture and policy enforcement
|
| Topic 5: EVPN-VXLAN Overlay Technologies | 25% | - Overlay network design and implementation
|
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NEW QUESTION # 42
You have designed a two-tier L2 data center network for a customer. While presenting the solution, the customer states that they have a mission-critical multicast application with sources and receivers in the data center.
Which CX feature, in addition to features supplied by the PIM-SM standard, should you explain to emphasize the value of your solution?
Answer: A
Explanation:
In classical Protocol Independent Multicast - Sparse Mode (PIM-SM) deployments, a single router on a shared multi-access segment is elected as the Designated Router (DR) based on priority or highest IP address.
Under standard PIM-SM, only this active DR joins the multicast shared distribution tree and forwards multicast traffic onto the segment, while the non-DR remains idle. In high-availability environments, if the active DR fails, multicast forwarding halts until neighbor hold timers expire, a new DR is elected, and new PIM Join messages build the distribution tree.
To overcome this failover penalty in mission-critical environments, ArubaOS-CX introduces PIM-SM Active- Active with Virtual Switching Extension (VSX). When configured across a VSX core/aggregation pair, both peer switches synchronize IGMP snooping tables, multicast routes, and outgoing interface lists (OIL) across the VSX Inter-Switch Link (ISL).
One VSX node operates as the active Designated Router, while the peer operates as a proxy Designated Router with its forwarding state fully staged in hardware. Should the active DR encounter an uplink failure or chassis outage, the peer proxy DR assumes active stream forwarding instantaneously, minimizing packet loss and preserving application delivery for mission-critical video, financial telemetry, or medical imaging feeds.
Reference Topics: HPE ArubaOS-CX High Availability - VSX Multicast Enhancements; PIM-SM Active- Active Synchronization and Sub-Second Recovery.
NEW QUESTION # 43
Waratah Hospital, located in Australia, plans to move many data-center services to a new facility. (The remaining legacy data center is outside the scope of this project.) Waratah Hospital has engaged an external consultant to help design the new data-center network.
Based on the data-center network-infrastructure requirements, the external consultant has produced a high- level design. The design document is summarized below.
Requirements and information:
Six racks in the data-center room (a single row).
Redundant top-of-rack leaf switches with back-to-front cooling in each rack, delivering 10/25 Gbps connectivity to servers, storage, and other devices.
Four 100 GbE uplinks per leaf switch.
The customer requested that all switch ports face the rear of the racks (the hot aisle).
OOB management for servers, storage, and the network must be provided through an external switch with back-to-front cooling. This switch must be included in the solution. One OOB switch provides connectivity for two racks.
Core equipment for the OOBM network is being reused.
Middle-of-row spine switches.
The data center must connect to the hospital building with links providing 400 Gbps.
Internet access is supplied through an existing firewall cluster with two firewalls, with one firewall in each data room. The second firewall operates in standby mode, and VRRP is used for firewall failover. The data- center network must connect to these firewalls with links totaling 100 Gbps.
The external link is a dark-fiber direct link based on single-mode fiber (OS2). The distance to the main hospital is 1.5 KM. The links will terminate on two core switches in the hospital.
The customer also requires:
99.999% uptime for this life-critical environment.
Planned and unplanned downtime must be minimized.
Software upgrades are permitted only once per year with close to zero downtime.
All life-critical resources are accessed locally, and all resources exist within the hospital campus.
Waratah Hospital requires a highly secure data-center environment. Encrypted wire-speed connectivity between the data room and the hospital is mandatory because the link between the buildings crosses a public road.
Waratah Hospital has a mix of virtualized (vSphere) servers, Nutanix storage, bare-metal servers, backup servers, and other devices.
In the past, the hospital experienced a security breach that caused data loss, network downtime, and identity theft.
Given the scenario, what environmental information should be gathered to supplement the design? Choose two.
Answer: A,C
Explanation:
Physical facility engineering is an essential prerequisite in data center network architecture to prevent hardware failure, thermal throttling, and unbudgeted infrastructure redesigns. When validating site facilities against proposed networking equipment, power draw and thermal dissipation must be quantified.
Power requirements-measured in maximum volt-amperes (VA) and watts under peak traffic loads-are essential to size the facility's uninterruptible power supply (UPS) systems, verify circuit breaker capacities, and ensure dual power distribution unit (PDU) feeds can deliver N+1 or 2N electrical redundancy to the switch power supplies. Concurrently, calculating heat dissipation-expressed in British Thermal Units per hour (BTU/hr)-is mandatory for HVAC facilities teams to engineer sufficient computer room air conditioning (CRAC) or air handling (CRAH) capacity.
Failure to accurately size thermal loads risks exceeding thermal thresholds, triggering automated internal fan ramp-ups, thermal degradation alarms, or defensive hardware shutdowns in life-critical medical topologies.
Note that connectivity and switch rack placement are already designated in the high-level design specification.
Reference Topics: HPE Data Center Facilities Preparation - Site Power Sizing, Thermal Management, Heat Dissipation (BTU/hr), and Environmental Constraints.
NEW QUESTION # 44
You are replacing the access layer in a customer data center network that uses VMware NSX. The customer has identified several subnets outside the VMware platform for which the customer wants to add overlay routing.
What high-level plan will work for this customer?
Answer: B
Explanation:
In modern data center architectures combining hardware switching fabrics with software-defined overlays, control-plane boundaries must be rigorously maintained. VMware NSX utilizes proprietary host-level encapsulation mechanisms (such as GENEVE or NSX-managed VXLAN) where the overlay dataplane is programmed directly via the NSX Manager and Edge transport nodes.
HPE ArubaOS-CX switches natively implement standards-based BGP EVPN (RFC 7432 / RFC 8365) to provide Layer 2 and Layer 3 VXLAN overlay services across physical and bare-metal environments. AOS- CX documentation and design standards explicitly dictate that native hardware-based EVPN-VXLAN deployments and VMware NSX-V hardware vtep integration models operate as separate, mutually exclusive functional domains. Consequently, physical CX switches cannot directly inject external non-VMware subnets into the internal host-level NSX overlay encapsulation tables via Fabric Composer plug-ins.
The architecturally sound strategy requires establishing a discrete, standards-based EVPN-VXLAN overlay fabric across the CX access/leaf layer for the external workloads. Routing between the VMware NSX overlay domain and the CX EVPN-VXLAN tenant domains is subsequently achieved through deterministic Layer 3 border handoffs (such as VRF-lite or external eBGP peering) at the data center core or border leaf tier.
Reference Topics: HPE Data Center Architectures - VXLAN EVPN Overlays vs. VMware NSX Software Fabric Boundaries; Inter-Domain Border Handoff Models.
NEW QUESTION # 45
What are important characteristics to mention while discussing possible connections for VMware hosts to server-access-switches?
Answer: B
Explanation:
VMware hosts can use LACP only when the required vSphere features/licensing are available, typically with a vSphere Distributed Switch. This is important when designing host-to-access- switch connectivity.
NEW QUESTION # 46
Which information is likely to appear in the device-inventory deliverables? Choose two.
Answer: C,D
Explanation:
During the final design documentation and project closeout phases, the architect compiles standard technical deliverables, including the physical topology diagrams, logical schema, rack elevations, and the Device Inventory document.
The Device Inventory deliverable serves as the single source of truth for all deployed physical and virtual network infrastructure assets. Essential baseline attributes documented for every switch chassis and management controller include the standardized Hostname (Device Name) and the primary Management IP Address (along with subnet mask and default gateway). Additionally, complete device inventory records capture serial numbers, MAC addresses, physical rack unit locations, installed software/firmware versions, and associated asset tags.
In contrast, Return Merchandise Authorization (RMA) workflow instructions represent operational maintenance procedures documented in day-2 support runbooks, while migration Gantt charts belong to the project management execution plan rather than the static device-inventory deliverable.
Reference Topics: HPE Network Documentation Standards - As-Built Deliverables; Formatting Device Inventory, Host Naming, and IP Management Records.
NEW QUESTION # 47
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