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| Section | Objectives |
|---|---|
| Wireless Security Design | - Guest access and segmentation strategies - WPA2/WPA3 enterprise security design - 802.1X authentication and RADIUS integration |
| Cisco Wireless Architecture | - Mobility groups and roaming design - Controller-based architecture (WLC) - Lightweight Access Point (LAP) deployment models |
| Troubleshooting and Validation | - Validation tools and post-deployment testing - Wireless performance troubleshooting methodologies |
| Wireless Site Survey and Requirements Analysis | - Business and technical requirements gathering - Physical environment assessment and constraints - Coverage and capacity planning |
| High Availability and Performance Optimization | - Redundancy design for controllers and APs - Load balancing and RF optimization |
| RF Fundamentals and Design Principles | - Channel planning and interference mitigation - Antenna types and placement strategies - RF behavior and propagation |
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NEW QUESTION # 27
A wireless engineer is getting ready to perform a predictive site survey. The new network needs to support data and voice over wireless. Which two Cisco recommendations should be considered for the design? (Choose two.)
Answer: C,E
Explanation:
For a network supporting both data and voice over wireless, two key Cisco design recommendations apply. First, the 5 GHz radio band is recommended for voice over wireless due to its wider channel bandwidths, allowing for higher data rates and better quality of service for latency-sensitive applications. 40 MHz channels in the 5 GHz band provide significantly higher throughput than 20 MHz channels in 2.4 GHz, making Option B correct for the bandwidth reason stated. Second, setting the cell boundary to -67 dBm ensures sufficient signal strength for reliable voice communication at the cell edge, which is the Cisco standard threshold for VoWLAN coverage.
NEW QUESTION # 28
A customer wants to provide wireless coverage in a parking lot outside of a building. An engineer determines that three APs are required. The APs can be mounted on the light poles in the parking lot because there are cable routes already in place for these locations. The closest wiring closet is approximately 200 meters away. Which setup powers and connects the APs back to the customer network?
Answer: D
Explanation:
This question hinges on a fundamental network engineering constraint: the maximum transmission distance of copper Ethernet cabling. IEEE 802.3 standards specify a maximum segment length of 100 meters for all standard PoE and Ethernet over Category 5e, 6, or 6A UTP copper cabling. The parking lot light poles are approximately 200 meters from the closest wiring closet -- more than double the maximum copper distance. This immediately eliminates Options A and D (Category 6 UTP): at 200 meters, UTP copper cannot reliably carry Ethernet at any supported speed. The correct solution is fiber optic connectivity between the wiring closet and the parking lot poles, combined with a local AC/DC power module at each pole location. Fiber optic cabling supports runs of hundreds of meters to kilometers -- easily spanning 200 meters. At the AP mounting location on the light pole, an AC/DC power module (powered from the pole's existing electrical supply) converts AC power to the DC power the AP requires. Option B (fiber with 802.3af) is incorrect because PoE cannot be delivered over fiber -- 802.3af requires copper cabling for simultaneous power and data delivery. The AC/DC power module at the remote end is the correct power solution when fiber is required.
NEW QUESTION # 29
A wireless engineer is using Ekahau site survey to validate that an existing wireless network is operating as expected. Which type of survey should be used to identify end-to-end network performance?
Answer: B
Explanation:
An active ping survey is used to validate network performance by sending and receiving data packets to measure end-to-end network performance, including latency, packet loss, and throughput. Ekahau site survey tools can perform active ping surveys to test the connectivity and performance of the wireless network while the surveyor walks the floor plan, producing a geographically correlated map of network performance metrics.
This differs fundamentally from passive surveys, which only measure signal strength from beacons. A GPS- assisted survey (Option A) is used for large outdoor areas to automate location tracking. Spectrum analysis (Option B) identifies Layer 1 RF conditions but does not measure network performance. A passive survey (Option C) measures RSSI and SNR but does not test actual data connectivity or throughput. Active ping is the correct tool for validating that the network delivers the expected end-to-end service levels. Reference:
WLSD Study Guide - Ekahau Survey Types, Active Survey Methodology, Post-Deployment Validation.
NEW QUESTION # 30
The wireless team must configure a new voice SSID for optimized roaming across multiple WLCs with Cisco
8821 phones. Which two settings accomplish this goal? (Choose two.)
Answer: A,E
Explanation:
For optimized roaming across multiple Wireless LAN Controllers (WLCs) with Cisco 8821 IP phones, two critical settings must be configured. First, configuring mobility groups between WLCs (Option A) allows for seamless inter-controller roaming by establishing mobility tunnels between controllers, enabling them to share client security context, preventing re-authentication when a phone roams from an AP on one WLC to an AP on another. Second, using Cisco Centralized Key Management (CCKM) for authentication (Option B) reduces the time required for re-authentication during roaming from a full 802.1X exchange to a single- message re-key process. CCKM stores the wireless security keys at the WLC level, enabling rapid key re- derivation during roaming without contacting the RADIUS server. AP groups (Option C) control SSID and VLAN assignments per AP cluster but have no impact on inter-controller roaming. AVC profiles (Options D and E) control application visibility and QoS marking - marking voice as best effort (Option E) would actually degrade rather than improve voice quality. Reference: WLSD Study Guide - VoWLAN Mobility Optimization, CCKM Configuration, Mobility Group Design for Multi-Controller Deployments.
NEW QUESTION # 31
Which strategies must the engineer use for the antenna deployment model in a warehouse?
Answer: A
Explanation:
Warehouse wireless deployments present unique RF engineering challenges: extremely high ceilings (often
25-45 feet), dense metallic shelving systems that create specular reflections and RF shadows, narrow aisles between rack systems, and the need to cover linear travel paths for RF scanner devices. The recommended Cisco antenna strategy for warehouses is wall-mounted patch (directional) antennas. Patch antennas provide a forward-facing radiation pattern that can be aimed precisely down warehouse aisles, delivering concentrated RF energy where RF scanners actually operate - in the aisles between shelving - rather than dispersing energy into metallic shelving structures. Wall mounting at intermediate height (typically 10-15 feet on aisle- end walls) places the antenna at a height that aligns the main lobe with the working zone of handheld scanners. Ceiling-mounted omnidirectional antennas (Options A and C) at warehouse ceiling height suffer from excessive path loss to floor-level devices and metal shelving obstructions. Low-gain wall-mounted omnidirectional antennas (Option B) lack the directivity needed to focus energy down specific aisles.
Reference: WLSD Study Guide - Warehouse Wireless Design, Antenna Selection and Placement, Industrial RF Environment Considerations.
NEW QUESTION # 32
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