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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Wireless Site Survey | 25% | - Post-deployment site survey - Collect design requirements and evaluate constraints - Layer 1 site survey analysis - Predictive site survey - Planning tools and network metrics evaluation - Material attenuation and its design effects - Pre-deployment site survey |
| Topic 2: Mobility | 25% | - Site Tags - Validate mobility tunneling - Optimize client roaming - Design mobility groups |
| Topic 3: Wired and Wireless Infrastructure | 30% | - Design high-density wireless networks - Physical infrastructure requirements - Logical infrastructure requirements - Design for data, voice, video, location - Design wireless bridging (mesh) - Design radio management |
| Topic 4: WLAN High Availability | 20% | - Design AP high availability - Design controller high availability |
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NEW QUESTION # 12
During a post-deployment site survey, issues are found with non-Wi-Fi interference. What should the engineer use to identify the source of the interference?
Answer: D
Explanation:
Cisco Spectrum Expert is a dedicated spectrum analysis tool designed to identify and analyze non-Wi-Fi interference sources at Layer 1. During a post-deployment site survey, it can detect interference from various devices such as cordless phones, Bluetooth devices, microwave ovens, video cameras, and other unlicensed RF emitters. The tool provides a visual representation of the RF environment across the frequency spectrum, allowing engineers to pinpoint the exact source of interference and characterize it by duty cycle, frequency, and interference pattern. A network analysis module (Option A) operates at Layer 2 and above, unable to detect non-802.11 RF emissions. Wireless intrusion prevention (Option B) detects rogue APs and 802.11 attacks but not Layer 1 RF noise. Wireshark (Option C) is a packet capture tool for Layer 2-7 analysis and cannot detect non-Wi-Fi RF energy. Reference: WLSD Study Guide - Layer 1 Spectrum Analysis, Post- Deployment Survey, Non-Wi-Fi Interference Identification.
NEW QUESTION # 13
A company has three Cisco WLCs that are joined as a mobility group. Mobility multicast messaging is enabled. All the WLCs in the mobility group communicate via a multicast. Which configuration must be identical between the three WLCs to validate communication?
Answer: D
Explanation:
When Cisco WLCs are configured to use multicast for mobility group communications, all WLCs participating in the same mobility group must be configured with an identical multicast group IP address. The mobility multicast mode allows a WLC to send a single multicast frame received simultaneously by all other WLCs in the group, rather than sending individual unicast copies to each peer. For this to function correctly, every WLC in the group must join the same IP multicast group address, and the underlying network infrastructure must be configured to support IP multicast routing or IGMP snooping for that specific group address. If any WLC is configured with a different multicast IP address, it will join a different multicast group and will not receive mobility messages from the other WLCs, effectively isolating it from the group ' s communication plane. Service port IP addresses (Option A) are unique per controller. Interface IDs (Option B) are locally significant identifiers. Management IP addresses (Option C) are unique per WLC and identify each peer in unicast configurations. Reference: WLSD Study Guide - Mobility Group Configuration, Multicast Mobility Messaging, WLC Peer Communication.
NEW QUESTION # 14
A network engineer is deploying Cisco 9130I APs on multiple Cisco Catalyst 9800-80 WLCs with Cisco Catalyst Center. The engineer must enable Cisco AI Analytics and location analytics to use the RRM features to automatically manage the WLC RF profiles. Which type of license must be used on Cisco Catalyst Center?
Answer: D
Explanation:
Cisco Catalyst Center's AI-driven network management capabilities -- including AI Analytics, AI- Enhanced RRM (Radio Resource Management), location analytics (DNA Spaces integration), and automated RF profile management -- are exclusively available under the Catalyst Advantage license tier. The Advantage tier builds upon the Essentials tier and adds access to the full suite of AI/ML- powered assurance and optimization features. Specifically, AI-Enhanced RRM leverages machine learning models trained on historical RF telemetry to predict and prevent RF issues, dynamically adjust channel and power assignments, and automate RF profile selection -- capabilities that cannot be activated without the Advantage license. Location analytics through Catalyst Center integrates with Cisco Spaces to provide real-time client location tracking, asset tracking, and spatial analytics.
NEW QUESTION # 15
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: A
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 # 16
An engineer is designing a high-density WLAN that must support 100 concurrent users with 100 Mbps throughput consistently. The design allows for 20 Mbps per cell and per channel on the 5 GHz band. How many channels must the design use to provide 1 Mbps per user prior to RF overhead?
Answer: B
Explanation:
This question requires straightforward wireless capacity engineering calculation. The total throughput requirement is 100 users ?1 Mbps per user = 100 Mbps aggregate. Each channel in the design can support 20 Mbps of usable throughput -- this is the per-cell, per-channel allocation defined in the design parameters, representing usable throughput prior to RF overhead as stated in the question. The number of channels required is: total required throughput divided by throughput per channel = 100 Mbps ?20 Mbps per channel = 5 channels. In practice, each channel corresponds to a non-overlapping frequency assignment in the 5 GHz band. With 5 channels and 20 Mbps per channel, the design provides exactly 100 Mbps of aggregate capacity for 100 concurrent users at 1 Mbps each. This calculation methodology is foundational to Cisco's high-density WLAN design approach, where the number of spatial streams, channel allocations, and AP placement are all derived from the per-user throughput requirement multiplied by the concurrent user population.
NEW QUESTION # 17
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