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質問 # 84
A global cruise line company needs to refresh its current fleet. They will refresh the 'insides' of the ship to be cost-effective and increase their sustainability. They will replace the complete WLAN/LAN hardware of the ship. In this refresh, the company will not refresh its current security requirements. The CIO also wants to limit the number of unused ports in the switches. Future expansion will always mean a refresh of hardware.
They start with the smallest ship with a maximum of 800 guests.
Each ship has a LAN infrastructure consisting of two core switches, up to 10 redundant distribution switches, and up to 500 access switches (400 cabins, 100 technical rooms). The core switches are located in the MDF of the ship and the distribution switches are located in the IDFs of the ship. Each cabin and technical room gets one single access switch.
The cabling structure of the ship will not be refreshed. Each IDF is connected to the MDF by SMF, of which two pairs are available for the interconnect between the core and distribution. The length of SM fiber between MDF and IDF is less than 300 meters (980 ft) and the type used is OS1. Each cabin is connected by a single OM2 pair to the IDF, the maximum length is 60 meters (200 ft). Each technical room is connected by a single OM2 pair to the IDF, with lengths between 100 and 150 meters (320 and 500 ft).
For each cabin/technical room the customer is looking to replace their current fan-less 2530/2540 without changing the requirements, except they need to upgrade the uplink to distribution switch to 10 GbE to handle the increased network traffic, and the technical rooms need redundant power.
The WLAN infrastructure will be 1:1 refreshed without new cabling or new AP locations. Their WLAN infrastructure is based on the 200/300 series indoor and outdoor APs running InstantOS (less than 300 APs), the customer has no change in WLAN requirements.
The cruise line company will replace its current Internet connection before the LAN/WLAN refresh. The new Internet connection will provide a 99.8% uptime, which is needed to ensure the paid guest Wi-Fi is always operational. With this new Internet connection, the CIO of the cruise line wants to base the design on the ESP architecture from Aruba because the Internet connection is guaranteed.
Based on best practices, what should you recommend as the correct optic type for the connection between the IDF and the cabins?
正解：A
解説：
* Cabling Type in Use:Each cabin and technical room is connected to the IDF with a single OM2 multimode fiber pair. The maximum length to cabins is 60 meters, and to technical rooms 100-150 meters.
* Best Practice for 10 GbE over OM2:According to Aruba's Campus Access Design Guides and HPE Aruba CX switch transceiver support matrices:
* OM2 multimode fiber supports 10GBASE-SR optics up to 82 meters.
* Since the maximum run is 60 meters, 10GBASE-SR is fully supported with headroom.
* 10GBASE-LRM can reach 220 m on MMF, but is not required here because the fiber length is much shorter. SR optics are simpler, lower cost, and recommended in best practices when distances are within OM2 limits.
* 10GBASE-T RJ-45 (Cat6A) is not applicable, as the cabling is fiber, not copper.
* BiDi 40 km optics are for long-haul single-mode fiber links, not short multimode fiber runs.
* Aruba Validated Design Reference:Aruba's Validated Solution Guides for Campus Access state that for short multimode connections (OM2/OM3/OM4), the recommended transceiver type is
10GBASE-SR (SFP+ LC) as it provides the most cost-effective and reliable option within the supported reach.
* Requirement Mapping:
* Uplinks to access switches in cabins/technical rooms must be 10 GbE capable.
* The OM2 cabling length (60-150 m) is within the supported distance for 10GBASE-SR.
* Therefore, the correct and most efficient optic choice is 10G SFP+ LC SR 300 m MMF Transceiver.
Final Justification:
Option B is correct because 10GBASE-SR over OM2 supports the required distances, aligns with Aruba design best practices, and avoids unnecessary cost/complexity of LRM or BiDi optics.
Reference Extracts (Aruba Official Study & Design Guides):
* Aruba Campus Access Design Guide: recommended transceiver selection for MMF cabling.
* Aruba CX Transceiver Guide: 10GBASE-SR supports OM2 up to 82 m, OM3 up to 300 m, OM4 up to
400 m.
* Aruba Validated Solution Guide: Always select SR optics for OM2 # 82 m runs as the cost-effective standard.
質問 # 85
A large multinational financial institution has contracted you to design a new full-stack wired and wireless network for their new 6-story regional office building. The bottom two floors of this facility will be retail space for a large banking branch. The upper floors will be carpeted office space for corporate users, each floor being approximately 100,000 sq ft (9290 sq m). Data centers are all offsite and will be out of scope for this project. The customer is underserved by its existing L2- based network infrastructure and would like to take advantage of modem best practices in the new design. The network should be fully resilient and fault-tolerant, with dynamic segmentation at the edge.
The retail space will include public guest Wi-Fi access. Retail associates will have corporate tablets for customer service, and there will be a mix of wired and wireless devices throughout the retail floors. The corporate users will primarily use wireless for connectivity, but several wired clients, printers, and hard VoIP phones will be in use.
The customer is also planning on renovating the corporate office space in order to take advantage of 'smart office' technology. These improvements will drive blue-dot wayfinding, presence analytics, and other location-based services.
The client is looking to utilize lower-cost OS-CX switches in their wiring closets. They calculate that each closet will need a stack of qty 6 PoE (AT) and qty 4 Gigabit Ethernet switches stacked with low-cost DACs.
Which series switch should you recommend?
正解：A
解説：
Cost-Effectiveness: The CX 6200M series is designed for cost-sensitive deployments while still providing essential features for modern network requirements, making it suitable for the client's goal of maintaining budget constraints.
PoE Support: The CX 6200M series supports PoE (Power over Ethernet), including PoE AT, which is necessary for powering devices like IP phones, cameras, and wireless access points throughout the retail and office environments.
Sufficient Port Density: With the ability to stack multiple switches, the CX 6200M can efficiently accommodate the requirement for both PoE and Gigabit Ethernet connections, supporting the overall network design.
DAC Compatibility: The switches in the CX 6200M series are compatible with low-cost DACs for stacking, making it a practical choice for the client's stacking solution.
質問 # 86
A customer wants to have the ability to show network usage. Which product would allow them to have this visibility?
正解：D
解説：
Comprehensive and Detailed Explanation From Exact Extract:
* Aruba Central:Aruba Central is the cloud-native management and monitoring platform within the Aruba ESP architecture. It provides:
* Network usage visibility: dashboards and reports on client, application, and device traffic across wired, wireless, and WAN.
* Application visibility and deep packet inspection (DPI): showing how much bandwidth is consumed by each app or category.
* Historical and real-time analytics: enabling IT to monitor utilization trends and demonstrate network usage to stakeholders.
* Why not the other options?
* UXI (User Experience Insight): Provides end-user experience monitoring by using sensor devices to simulate client behavior (e.g., connectivity tests, SaaS performance), but it does not give full network usage visibility in terms of traffic volume or bandwidth utilization.
* ArubaOS 8.x: This is the operating system for Aruba mobility controllers and APs, enabling advanced WLAN features, but not a dedicated platform for traffic visibility dashboards or long- term usage reporting.
* ClearPass: Provides policy-based access control and security (authentication, authorization, accounting, device profiling), but it is not designed to show network traffic usage or utilization statistics.
* Aruba Design Guidance Alignment:According to Aruba's Campus Access Design Guides and Aruba Central documentation, the correct tool for showing and reporting network usage visibility is Aruba Central, which integrates AI Insights, traffic monitoring, and reporting capabilities as part of the ESP cloud platform.
Final Justification:
Option B is correct because only HPE Aruba Networking Central provides the ability to monitor and display network usage visibility in a centralized, graphical, and reportable way.
Reference Extracts (Aruba Official Study & Design Guides):
* Aruba ESP Campus Design Guide: Aruba Central as the management and visibility layer.
* Aruba Central Technical Overview: built-in dashboards for bandwidth utilization, client traffic, and application visibility.
* Aruba Central AI Insights: usage trends and capacity monitoring.
質問 # 87
ACME retail has 38 locations spread out across five US states and two provinces in Canada.
They are looking to grow 20% over the next two years. They have an HQ with a staff of 200 employees. The organization has eight Regional Managers and two VPs who work from home and the road. Stores typically have 17 employees on average per location.
The two warehouses have a remote loading system and 20 employees each to load the trucks and fulfill the online orders. The warehouse has 40-foot ceilings and large metal racks to store inventory. The main location is 240K sq ft (22300 sq m) and the Canadian warehouse is 130K sq ft (12100 sq m). The forklifts on the loading docks are equipped with a wireless tablet on board.
A typical store is reportedly about 60,000 sq ft (5575 sq m) and smaller stores are planned at
25,000 sq ft (2320 sq m). The locations need to expand the abilities to vendors that need to add setup displays or interactive kiosks in the stores. The current infrastructure was installed in 2015 and used wireless N technology in a coverage model. The wiring is Cat5, and they are unsure of the fiber connections. The inventory is all placed on the floor when it is delivered to the local store.
Inventory control is handled through Zebra barcode scanners, and they have had a lot of issues in getting signals throughout the stores and this makes monthly inventory difficult. The organization has a small help desk to troubleshoot issues that happen at the retail locations and PC support for the office. The company is looking to upgrade away from the current PBX system later this year. With the need to grow and cut costs, they are interested in moving the data to the cloud but need to get almost real-time inventory control for the online service to function.
The network has all been wired over the last ten years, but with the new systems being all wireless, they have seen the trend to offer wireless to all the vendors for their needs but also would be to allow employees, guests, and contractors all to use it. With the new IT director starting next week, the project has been set by the CTO of the company. The marketing group has asked how they can interact with the customers and get more info, while the IT support desk needs to cut staff in half.
The office has an MDF and two IDFs located on floors one and two. The MDF is in the basement, and you have multiple WAN circuits for the HQ links. Each store has a local handoff from the cable company (ethernet) in the middle of the store in the office, so distance for the wiring is not an issue.
The customer has budget concerns but does want something that could last 7+ years.
Based on the best practices and customer requirements, what is the correct WLAN approach?
正解：B
解説：
For ACME Retail, which has multiple locations and a mix of environments including high-ceiling warehouses and retail spaces, an Aruba Instant OS 8 deployment is a suitable WLAN approach.
Aruba Instant OS provides a controller-less architecture, which simplifies the deployment and management of the wireless network, especially across multiple sites. This approach enables ACME Retail to manage their entire wireless network from a single interface without the need for dedicated hardware controllers, reducing costs and complexity. Instant OS also supports advanced features like Adaptive Radio Management and ClientMatch to ensure optimal performance in diverse environments, making it an effective solution for ACME's varied locations and requirements.
質問 # 88
XYZ Regional Hospital is an integrated healthcare system of hospitals, neighborhood health centers, and small doctor offices. XYZ Regional Hospital has recently merged with 1 neighborhood health center and 125 doctor branch offices. The wireless, wired access, and AAA solutions are outdated and need to be replaced.
XYZ Regional Hospital is looking to future-proof and improve efficiency across all sites by enhancing wired and wireless access and migrating to a centralized and unified wired/wireless and policy management solution that can provide uninterrupted availability of all systems.
Locations:
* XYZ Regional Hospital is located in New York City.
* Dila Health Center is located in City A.
* Mount Health Center is located in City B.
* Rock Health Center is located in City C.
* Branch clinics are located at different locations across the United States.
Requirements:
* Provide, via management software, one single pane of glass to manage wired/wireless LANs, and VPNs across campus, branch, and remote via web/cloud architecture with near real-time insight, troubleshooting, and service-level performance reporting.
* Seamless integration across wired, wireless, WAN, SD-Branch, and IoT.
* Provide secure wireless access to all employees and partners, and guest Wi-Fi to patients/visitors.
* All APs must support Wi-Fi 6E (802.11ax certified).
* Security: WPA2/WPA3, 802.1X with RADIUS.
* Identify and authenticate every wired and wireless device.
* Provide end-to-end role-based security.
* Enable seamless mobility for staff, patients, and visitors.
* Support zero-touch deployment to cut deployment times from days to hours.
* Establish a resilient, future-ready network infrastructure with intelligence, scalability, and intuitive toolsets.
* Provide a fully redundant branch solution with dynamic path selection to the hospital.
NAC Solution Requirements:
* Fully redundant NAC solution for management and authentication.
* Local wireless and wired authentication for the main hospital.
The IT director of XYZ Regional Hospital is interested in a solution for nurse workstation tracking.
What solution would meet the customer's requirements? (Select three.)
正解：A、D、F
質問 # 89
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