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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: WLAN High Availability | 20% | - Design AP high availability - Design controller high availability |
| Topic 2: Wired and Wireless Infrastructure | 30% | - Physical infrastructure requirements - Design for data, voice, video, location - Design wireless bridging (mesh) - Logical infrastructure requirements - Design high-density wireless networks - Design radio management |
| Topic 3: Mobility | 25% | - Design mobility groups - Validate mobility tunneling - Optimize client roaming - Site Tags |
| Topic 4: Wireless Site Survey | 25% | - Material attenuation and its design effects - Pre-deployment site survey - Predictive site survey - Planning tools and network metrics evaluation - Collect design requirements and evaluate constraints - Layer 1 site survey analysis - Post-deployment site survey |
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NEW QUESTION # 67
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: C
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 # 68
A wireless consultant must design a Cisco WLAN. The consultant recommends a solution that requires 12 Cisco 9100 Series APs connected to a Cisco 3800 Series PoE+ switch. Each AP requires PoE+ for full functionality. What is the total PoE requirement in watts?
Answer: C
Explanation:
This question requires a straightforward PoE power budget calculation. The IEEE 802.3at standard (PoE+) delivers a maximum of 30W at the Power Sourcing Equipment (PSE/switch port). Cisco 9100 Series access points such as the C9120, C9130, and C9136 are designed to operate with full functionality using PoE+ at
30W per AP. The total PoE power requirement for 12 APs is calculated as: 12 APs ร 30W per AP = 360W.
This figure represents the total power draw that the Cisco 3800 Series PoE+ switch must be capable of supplying across the connected AP ports simultaneously. The Cisco Catalyst 3800 Series switches offer a total PoE power budget that must be validated against this 360W requirement during the design phase. Note that some Cisco 9100 APs support higher power modes through IEEE 802.3bt (PoE++), which can provide up to
90W - but the question specifies PoE+ (802.3at) for the switch infrastructure, making 30W ร 12 = 360W the correct answer. Option D (720W) would correspond to 24 APs at 30W each. Option B (1080W) would represent 36 APs. Option C (184.8W) corresponds to a non-standard per-AP power value. Reference: WLSD Study Guide - PoE Power Budget Planning, Cisco 9100 Series AP Power Requirements, Wired Infrastructure Design for Wireless Deployments.
NEW QUESTION # 69
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: A
NEW QUESTION # 70
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 # 71
A small customer has a legacy autonomous mode Wi-Fi deployment that provides a low-density and low- capacity service. The customer wants to update and replace this deployment with the latest Wi-Fi technology but has a fixed budget that will pay only to replace the APs. Which architectural controller deployment model suits this requirement?
Answer: A
Explanation:
Cisco ' s Embedded Wireless Controller (EWC) architecture is the ideal solution for small deployments with strict budget constraints where only the access points can be replaced. EWC is a controller function that runs directly within the Cisco Catalyst 9100 Series access point itself - eliminating the need for a dedicated physical or virtual WLC appliance. The APs serve dual roles as both the wireless radio infrastructure and the controller platform. The unified model (Option B) requires a dedicated hardware WLC such as the 9800 series, exceeding the customer ' s budget. Fabric (Option C) requires Cisco DNA Center and SD-Access infrastructure, making it cost-prohibitive for a small deployment. Cloud (Option D) requires ongoing subscription fees that may not fit a fixed one-time budget. EWC provides enterprise-grade features including centralized SSID management, RRM, and client mobility within the AP cluster - all without additional controller hardware investment. This makes it the canonical solution for SMB migrations from autonomous deployments. Reference: WLSD Study Guide - Controller Deployment Models, Embedded Wireless Controller Architecture, SMB and Branch Wireless Design.
NEW QUESTION # 72
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