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| Section | Weight | Objectives |
|---|---|---|
| Wired and Wireless Infrastructure | 30% | - Design for data, voice, video, location - Design radio management - Physical infrastructure requirements - Logical infrastructure requirements - Design high-density wireless networks - Design wireless bridging (mesh) |
| Mobility | 25% | - Design mobility groups - Site Tags - Validate mobility tunneling - Optimize client roaming |
| Wireless Site Survey | 25% | - Planning tools and network metrics evaluation - Pre-deployment site survey - Post-deployment site survey - Predictive site survey - Collect design requirements and evaluate constraints - Material attenuation and its design effects - Layer 1 site survey analysis |
| WLAN High Availability | 20% | - Design AP high availability - Design controller high availability |
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질문 # 71
A wireless consultant must design a Cisco WLAN. The consultant recommends a solution that requires 12 Cisco 9100 Series APs connected to a Cisco 3800 Series PoE+ switch. Each AP requires PoE+ for full functionality. What is the total PoE requirement in watts?
정답：D
설명：
This question requires a straightforward PoE power budget calculation. The IEEE 802.3at standard (PoE+) delivers a maximum of 30W at the Power Sourcing Equipment (PSE/switch port). Cisco 9100 Series access points such as the C9120, C9130, and C9136 are designed to operate with full functionality using PoE+ at
30W per AP. The total PoE power requirement for 12 APs is calculated as: 12 APs × 30W per AP = 360W.
This figure represents the total power draw that the Cisco 3800 Series PoE+ switch must be capable of supplying across the connected AP ports simultaneously. The Cisco Catalyst 3800 Series switches offer a total PoE power budget that must be validated against this 360W requirement during the design phase. Note that some Cisco 9100 APs support higher power modes through IEEE 802.3bt (PoE++), which can provide up to
90W - but the question specifies PoE+ (802.3at) for the switch infrastructure, making 30W × 12 = 360W the correct answer. Option D (720W) would correspond to 24 APs at 30W each. Option B (1080W) would represent 36 APs. Option C (184.8W) corresponds to a non-standard per-AP power value. Reference: WLSD Study Guide - PoE Power Budget Planning, Cisco 9100 Series AP Power Requirements, Wired Infrastructure Design for Wireless Deployments.
질문 # 72
A network engineer is designing a new wireless network. The network must include these requirements: ?optimized performance ?avoid interference ?availability in high-density areas ?roaming Which two approaches must be taken? (Choose two.)
정답：A,C
설명：
The design requirements -- optimized performance, interference avoidance, high-density support, and roaming capability -- collectively point to a dual-band strategy using narrow channel widths.
For 5 GHz operation (Option A), 20 MHz channels are the correct choice for high-density and campus- scale deployments. The 5 GHz band has significantly more non-overlapping channels compared to 2.4 GHz (up to 24 non-overlapping 20 MHz channels in UNII-1, UNII-2, and UNII-3), enabling a robust channel reuse plan with minimal co-channel interference and excellent roaming cell separation.
질문 # 73
A customer wants a network engineer to design a Cisco wireless solution that will have redundancy through SSO and LAG. APs in the executive office must reassociate to the WLC as soon as possible in the event of a failure. The WLCs are located in a remote data center. The head office uses a WAN for connectivity with the data center. Which priority must be incorporated in the design to be assigned to the executive APs?
정답：B
설명：
Cisco WLC AP Failover Priority governs the order in which APs are processed when a WLC recovers and APs begin re-associating. The priority levels are: Critical, High, Medium, and Low. During recovery situations, the WLC will accept and process AP join requests in order of priority - Critical priority APs are processed first, before all other priority levels. In a deployment where the WLC is located in a remote data center connected via WAN, the join process for all APs is slower due to WAN latency and potential bandwidth constraints. Under these conditions, assigning Critical priority to executive office APs ensures they are at the front of the processing queue and restore service before lower-priority APs. The executive office designation implies business-critical operations requiring the fastest possible wireless restoration - a requirement that directly maps to the Critical priority level. High priority (Option A) would position the executive APs second in the queue behind any Critical priority APs. Medium (Option B) and Low (Option C) would place them further down the processing order. Reference: WLSD Study Guide - AP Failover Priority Configuration, N+1 and SSO Redundancy Design, WAN-Linked Controller Deployments.
질문 # 74
Refer to the exhibit. A wireless engineer is using the Ekahau Site Survey tool to conduct a post-deployment survey. The engineer analyzes the pictured output to determine if SNR meets the voice requirements. How is the voice support based on the output?
Exhibit - Q15: Ekahau SNR Heatmap - Post-Deployment Survey Output
정답：A
설명：
Voice over WLAN (VoWLAN) deployments require a minimum SNR threshold to maintain acceptable Mean Opinion Score (MOS) values for call quality. Cisco ' s 300-110 WLSD curriculum specifies that VoWLAN requires a minimum SNR of 25 dB throughout the coverage area. In an Ekahau post-deployment survey SNR heatmap, when the heatmap displays a consistent color indicating SNR at or above this threshold across the entire surveyed area - including all rooms, corridors, and common areas such as the lobby - the conclusion is that voice service is supported in all locations. The color coding in Ekahau ' s SNR heatmap uses green tones to indicate adequate SNR (typically #25 dB) and shifts toward yellow and red for degraded conditions.
When the exhibit heatmap shows uniform adequate coverage across all surveyed areas without yellow or red zones, it confirms the SNR requirement for VoWLAN is universally met. Options A, B, and C suggest partial or no coverage, which would be indicated by mixed or poor SNR values - conditions not present in this scenario. The post-deployment survey with Ekahau is the validation step confirming that the predictive design was accurately realized in the physical environment. Reference: WLSD Study Guide - VoWLAN Design Requirements, SNR Thresholds, Post-Deployment Survey Validation with Ekahau.
질문 # 75
A wireless engineer must design a backhaul link. The engineer has a mesh access point that has a wired connection back to the infrastructure. What must be changed in the AP role before a change is made in the AP mode?
정답：B
설명：
In Cisco mesh networking architecture, access points are classified into two primary roles: Root Access Points (RAP) and Mesh Access Points (MAP). A RAP is an access point that maintains a wired Ethernet backhaul connection back to the network infrastructure, while a MAP operates wirelessly, relying on mesh backlinks to upstream RAPs. When an engineer needs to change an AP mode -- such as switching to bridge mode to extend the mesh -- the AP role must first be defined correctly. The AP must be designated as a RAP before any mode-level configuration changes are applied. This sequencing is critical because the AP role defines the fundamental backhaul path; changing the mode without first establishing the role results in misconfiguration and potential connectivity loss. The RAP communicates directly with the wired infrastructure via its Ethernet port, making it the gateway for all downstream MAPs in the mesh topology.
질문 # 76
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