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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: WLAN High Availability | 20% | - Design controller high availability - Design AP high availability |
| Topic 2: Wireless Site Survey | 25% | - Pre-deployment site survey - Planning tools and network metrics evaluation - Layer 1 site survey analysis - Collect design requirements and evaluate constraints - Predictive site survey - Post-deployment site survey - Material attenuation and its design effects |
| Topic 3: Mobility | 25% | - Design mobility groups - Validate mobility tunneling - Site Tags - Optimize client roaming |
| Topic 4: Wired and Wireless Infrastructure | 30% | - Design wireless bridging (mesh) - Design for data, voice, video, location - Physical infrastructure requirements - Design high-density wireless networks - Logical infrastructure requirements - Design radio management |
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NEW QUESTION # 74
A university is deploying a wireless lecture-capture application that streams video to many clients simultaneously. Which controller design should the engineer specify to make efficient use of the wired network?
Answer: A
Explanation:
In multicast-unicast mode the controller replicates each multicast packet once for every joined AP and sends the copies as unicast CAPWAP frames, which consumes controller CPU and multiplies traffic across the wired uplink in direct proportion to the AP count - this does not scale for a campus-wide video application. In multicast-multicast mode the controller sends a single copy of the packet to a configured AP multicast group address, and the wired network's multicast infrastructure replicates it only where needed, delivering it to all subscribed APs efficiently. This requires that multicast routing (PIM) be enabled on the wired infrastructure between the controller and the APs, and that IGMP snooping be configured appropriately on the access switches.
Enabling broadcast forwarding floods traffic without any subscription control and creates its own scaling problem, and disabling multicast entirely returns the design to per-client unicast replication over the air.
NEW QUESTION # 75
A network engineer is designing a new wireless network for a campus. The network must include optimized performance, avoid interference, availability in high-density areas, and roaming. Which two approaches must be taken? (Choose two.)
Answer: B,C
Explanation:
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 a significantly greater number of 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.
NEW QUESTION # 76
A customer has a Cisco wireless network that supports VoWLAN services. The customer wants supported voice clients to receive roaming recommendations and suggestions from APs. This functionality must not impact non-VoWLAN clients. What should be enabled on the VoWLAN SSID?
Answer: C
Explanation:
IEEE 802.11v BSS Transition Management is the standard that enables the network (via the AP) to actively provide roaming recommendations and suggestions to associated clients. When enabled on a SSID, the AP can send BSS Transition Management Request frames to clients, informing them of preferred target APs ranked by signal quality, load, and channel conditions. Critically, BSS Transition Management is a voluntary mechanism - clients that support 802.11v can act on the AP ' s recommendation, while clients that do not support 802.11v simply ignore the BSS Transition Request frames and continue operating normally. This selective applicability directly satisfies the requirement that non-VoWLAN clients must not be impacted.
802.11k (Option A) enables clients to build neighbor lists through measurement reports - this is a client- initiated process, not an AP-to-client recommendation. CCKM (Option B) is a Cisco proprietary fast roaming mechanism for legacy clients, unrelated to roaming guidance. 802.11r (Option D) accelerates the re- association handshake during roaming but does not provide proactive roaming recommendations. Reference:
WLSD Study Guide - VoWLAN Design, 802.11v BSS Transition Management, Roaming Optimization Protocols.
NEW QUESTION # 77
A network design supports data and voice in 2.4 GHz and 5.0 GHz. The design must support asset tracking without affecting the existing design. Which action must be taken?
Answer: D
Explanation:
Cisco's WLAN location and asset tracking architecture (based on Cisco Spaces or legacy Cisco MSE/CMX) relies on the ability to receive and measure the RF signal from tagged assets at multiple APs simultaneously. For accurate location determination using triangulation or trilateration algorithms, a minimum of three APs must receive the tag's signal with sufficient RSSI.
Monitor mode APs are dedicated to passive RF listening -- they do not transmit client-serving SSIDs and focus their full radio attention on scanning all channels for signal measurement.
Placing monitor mode APs specifically on the perimeter of an asset tracking area provides the spatial diversity and boundary detection capability needed to accurately triangulate assets throughout the interior, without requiring any modifications to the existing data/voice serving APs.
Adding monitor mode APs at the perimeter as an overlay ensures the existing 2.4 GHz and 5 GHz voice/data design is entirely undisturbed.
NEW QUESTION # 78
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?
Ekahau SNR Heatmap -- Post-Deployment Survey Output
Answer: D
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.
NEW QUESTION # 79
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