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| Section | Objectives |
|---|---|
| Wireless Site Survey and Requirements Analysis | - Physical environment assessment and constraints - Coverage and capacity planning - Business and technical requirements gathering |
| Wireless Security Design | - 802.1X authentication and RADIUS integration - Guest access and segmentation strategies - WPA2/WPA3 enterprise security design |
| Troubleshooting and Validation | - Wireless performance troubleshooting methodologies - Validation tools and post-deployment testing |
| High Availability and Performance Optimization | - Load balancing and RF optimization - Redundancy design for controllers and APs |
| RF Fundamentals and Design Principles | - RF behavior and propagation - Antenna types and placement strategies - Channel planning and interference mitigation |
| Cisco Wireless Architecture | - Controller-based architecture (WLC) - Lightweight Access Point (LAP) deployment models - Mobility groups and roaming design |
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NEW QUESTION # 28
A network engineer is designing a wireless network to support high availability. The network will need to support the total number of APs and client SSO. Live services should continue to work without interruption during the failover. Which two requirements need to be incorporated into the design to meet these needs?
(Choose two.)
Answer: B,E
Explanation:
To support high availability with client SSO (Stateful Switchover) and no interruption to live services during failover, the design must incorporate two requirements. First, redundant WLCs (Option A) are essential - without a physical standby controller, there is no entity to take over when the primary WLC fails. In an SSO configuration, one WLC is active and one is standby, and the standby must be ready to assume the active role instantaneously. Second, the high availability pair requires one of the WLCs to have a valid AP count license (Option B). In a Cisco WLC SSO pair, the standby controller ' s AP count license applies when it becomes active - without a valid license on at least one WLC in the pair, APs cannot join after failover. A 10-second RTT maximum (Option C) is a latency requirement for the redundancy link but is not a primary design requirement that addresses the overall high availability architecture. A back-to-back direct connection (Option D) is one way to connect the redundancy ports but is not mandatory if a low-latency switch connection is used. Code version 7.5 or newer (Option E) is a requirement for specific legacy SSO platforms but not a general design principle. Reference: WLSD Study Guide - WLC SSO High Availability Design, AP License Requirements, Redundant Controller Architecture.
NEW QUESTION # 29
A hospital has a Cisco Catalyst 9800 Series Wireless Controller in an SSO solution deployed in the primary data center. The hospital plans to increase redundancy in the wireless environment.
Management decides to deploy an extra Catalyst 9800 WLC offsite to another data center on a different subnet. A WAN link connects the data centers with a firewall at both ends. Which two design approaches must the engineer take to ensure that the APs can fail over? (Choose two.)
Answer: D,E
Explanation:
For APs to be able to fail over between a primary SSO pair in one data center and a standalone WLC in a remote data center connected via WAN with firewalls, two design requirements must be met. First, a mobility tunnel must be created between the wireless controllers (Option A). The mobility tunnel enables the controllers to exchange mobility control messages, peer information, and eventually AP context when failover occurs. Without the mobility tunnel, the remote WLC is not recognized as a valid failover target by the APs through the mobility domain. Second, UDP ports 16666 and 16667 must be open through the firewalls between the controllers (Option D).
UDP port 16666 is used for mobility control traffic and UDP port 16667 is used for mobility data traffic -- both must be permitted through the firewalls at both data centers for the mobility tunnel to establish and function.
NEW QUESTION # 30
Users who leave the office with a wireless headset must be able to hand oft the voice call with minimal disruption. The engineer drafted four possible Door plans for AP placement:
* red dots and arrows represent the direction of travel
* blue dots represent the AP placements
Which floor plan provides the requested functionality?
A)
B)
C)
D)
Answer: C
Explanation:
VoWLAN handoff quality is fundamentally determined by the AP placement strategy relative to the direction of user movement. When a user is in motion carrying an active voice call, the roaming event must occur before signal quality degrades below the minimum acceptable VoWLAN threshold (typically -67 dBm for voice, with a minimum SNR of 25 dB). This requires the user to encounter increasing signal strength from a neighboring AP before the current AP ' s signal drops below the threshold. The optimal AP placement follows the principle of overlapping coverage along the predicted path of travel - APs must be positioned so that as a user moves, they progressively enter the coverage zone of the next AP while still within adequate range of the current one. Floor plan B represents the correct design where APs are positioned along the travel path with sufficient cell overlap (typically 15-20%) to ensure seamless 802.11r fast BSS transitions. Incorrect floor plans place APs perpendicular to travel direction, at path endpoints only, or with insufficient overlap zones - all of which create roaming dead zones where the handoff occurs too late, causing voice call disruption.
Reference: WLSD Study Guide - VoWLAN AP Placement, Roaming Design for Moving Users, Cell Overlap and Fast Transition Planning.
NEW QUESTION # 31
An engineer is using Ekahau Site Survey to create a WLAN plan for a warehouse. The plan is to use patch antennas. Which setting is adjusted when simulated APs are placed on the map?
Answer: C
Explanation:
In Ekahau Site Survey, when planning a warehouse deployment using patch (directional) antennas, the antenna downtilt setting is the critical adjustment made when placing simulated APs on the floor plan map.
Patch antennas have a defined radiation pattern with a main lobe that must be aimed precisely at the intended coverage zone. In a warehouse environment, APs with patch antennas are typically wall-mounted and aimed down aisles. The downtilt angle determines the vertical component of the antenna ' s aim - adjusting the downtilt in Ekahau tilts the simulated antenna ' s main radiation lobe downward toward the warehouse floor and the working zone of RF scanner devices, rather than projecting RF energy horizontally at an ineffective angle. Ekahau allows engineers to specify the horizontal and vertical orientation of the antenna in three dimensions, and the downtilt value directly controls how the software models the antenna ' s coverage pattern in the vertical plane. AP channel (Option A) is set during channel planning, not during AP placement. Wi-Fi technology (Option B) determines the modulation and protocol standard but is set as an AP property. AP transmission power (Option D) controls cell radius but is set separately from antenna orientation. Reference:
WLSD Study Guide - Ekahau Predictive Survey, Directional Antenna Configuration, Warehouse RF Design and Antenna Orientation.
NEW QUESTION # 32
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
Answer: B
Explanation:
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.
NEW QUESTION # 33
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