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| Section | Weight | Objectives |
|---|---|---|
| Wireless Site Survey | 25% | - Material attenuation and its design effects - Pre-deployment site survey - Planning tools and network metrics evaluation - Post-deployment site survey - Collect design requirements and evaluate constraints - Predictive site survey - Layer 1 site survey analysis |
| Wired and Wireless Infrastructure | 30% | - Physical infrastructure requirements - Design radio management - Logical infrastructure requirements - Design high-density wireless networks - Design wireless bridging (mesh) - Design for data, voice, video, location |
| Mobility | 25% | - Design mobility groups - Optimize client roaming - Validate mobility tunneling - Site Tags |
| WLAN High Availability | 20% | - Design AP high availability - Design controller high availability |
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NEW QUESTION # 20
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: C
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 # 21
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: D
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 # 22
An engineer is performing capacity planning for an open-plan office with 900 concurrent devices, each requiring 2 Mbps of application throughput. Assuming approximately 120 Mbps of usable aggregate throughput per 5 GHz radio, how should the AP count be determined?
Answer: A
Explanation:
Capacity-driven design starts with aggregate demand rather than area. Here 900 devices at 2 Mbps each represent 1800 Mbps of required throughput; dividing by roughly 120 Mbps of usable per-radio throughput yields a minimum of about 15 client-serving radios, before applying any headroom for growth or peak concurrency. That number is then cross-checked against the coverage model, because the resulting AP density must still deliver the required RSSI and SNR everywhere without creating excessive co-channel interference - if capacity demands more APs than coverage requires, transmit power and channel width are reduced to keep the cells small enough to coexist. Designing purely from coverage radius (Option A) is the classic failure mode in dense environments, producing enough signal but nowhere near enough airtime. Fixed device- per-AP ratios ignore the actual application profile, and available switch ports are a constraint to satisfy, not a method for sizing the RF design.
NEW QUESTION # 23
An engineer is designing a wireless network for a small airport and completes the initial walkthrough phase of the facility. Which step of the WLAN site survey should the engineer perform next?
Answer: D
Explanation:
The Cisco WLAN site survey methodology follows a structured, sequential process. The initial walkthrough -- sometimes called the discovery or orientation phase -- is the first step, during which the engineer physically tours the facility to understand its physical characteristics: building materials, structural layout, potential AP mounting locations, wiring closet positions, and environmental factors. After completing the initial walkthrough, the next logical phase is the predeployment survey (also referred to as a pre-deployment or predictive survey). The predeployment survey uses the information gathered during the walkthrough to create a detailed design plan -- either through a manual AP placement plan or a predictive survey tool such as Ekahau, where floor plans are annotated with materials and attenuation values and APs are virtually placed to model coverage. The predeployment survey output is the design document that drives the actual physical installation.
NEW QUESTION # 24
An engineer must design AP placements for a new branch office that contains two floors. The engineer uses Ekahau to complete the predictive survey. To calculate the signal bleed through between floors, the engineer creates a building, adds the floors, and attenuation areas. After the scale is set, what else must be added on the floors to accurately measure the signal bleed at a specific location?
Answer: B
Explanation:
In Ekahau Site Survey's multi-floor predictive modeling workflow, alignment points are the critical mechanism that allows the software to understand the precise vertical spatial relationship between floors in a multi-story building. Once floor plans are imported with their scale correctly defined, alignment points must be placed on each floor at the same real-world physical location -- such as a stairwell corner, elevator shaft, or structural column -- so that Ekahau can accurately calculate vertical signal propagation and inter-floor RF bleed. Without alignment points, the software has no spatial reference to determine which area on Floor 2 is directly above a given point on Floor 1, making floor-to-floor signal bleed calculations geometrically impossible.
NEW QUESTION # 25
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