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| Section | Weight | Objectives |
|---|---|---|
| Wireless Site Survey | 25% | - Material attenuation and its design effects - Post-deployment site survey - Collect design requirements and evaluate constraints - Predictive site survey - Pre-deployment site survey - Planning tools and network metrics evaluation - Layer 1 site survey analysis |
| WLAN High Availability | 20% | - Design controller high availability - Design AP high availability |
| Wired and Wireless Infrastructure | 30% | - Design wireless bridging (mesh) - Design for data, voice, video, location - Logical infrastructure requirements - Design high-density wireless networks - Physical infrastructure requirements - Design radio management |
| Mobility | 25% | - Optimize client roaming - Site Tags - Validate mobility tunneling - Design mobility groups |
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NEW QUESTION # 94
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 # 95
An engineer in a branch office that does not have a wired backhaul must ensure that local clients can be switched locally and authenticated centrally. In which mode must the AP be configured?
Answer: A
Explanation:
Flex+Bridge mode is a specialized AP operating mode that combines two distinct Cisco wireless capabilities: FlexConnect (for local switching of client data traffic and central authentication via the WLC) and Bridge/Mesh mode (enabling wireless backhaul when no wired Ethernet uplink is available). In a branch environment without wired backhaul, a standard FlexConnect AP (Option D) cannot operate because FlexConnect still requires an Ethernet connection for its control plane.
Bridge mode alone provides mesh backhaul but does not support the local switching with central authentication model required here. MAP (Option A) is a Mesh Access Point role for wireless backhaul, and RAP (Option C) is a Root Access Point with a wired connection -- neither meets the no-wired-backhaul requirement with local switching. Flex+Bridge uniquely satisfies both requirements: the Flex component allows locally switched VLANs to be bridged directly to the access layer without traversing the WAN, while the Bridge component enables the AP to use a wireless mesh link for its backhaul uplink. Central authentication is maintained via the CAPWAP control tunnel over the mesh link.
NEW QUESTION # 96
An engineer must assess an existing company WLAN to determine the possibility for future IEEE
802.11ac Wave 2 wireless deployment. All access switches are Fast Ethernet-capable only, and the wired infrastructure between existing APs and access switches is based on the CAT 6A standard. Which two actions provide maximum support of Cisco 3800 Series access points?
(Choose two.)
Answer: B,C
Explanation:
Cisco 3800 Series APs support IEEE 802.11ac Wave 2, which can deliver throughput exceeding
1 Gbps. Fast Ethernet switches are limited to 100 Mbps per port, creating a severe bottleneck.
The two actions that provide maximum support are replacing with mGig switches (Option A) and replacing with gigabit switches with 10G uplinks (Option B). mGig (Multi-Gigabit Ethernet) switches support 2.5G and 5G speeds over existing CAT 6A cabling, allowing the full throughput of 802.11ac Wave 2 APs to be utilized without replacing the existing cable plant. Gigabit switches with 10G uplinks ensure that the access layer can support 1 Gbps per AP port while providing sufficient uplink capacity.
NEW QUESTION # 97
A customer has an existing wireless network with a Cisco 9800 WLC high availability cluster and Cisco 9120 APs. The customer asks an engineer to perform a post wireless survey that includes a list of any non-802.11 devices on the 5 GHz band. The engineer performs the survey using an 802.11a/b/g/n/ac/ax WLAN adapter but did not use a spectrum analyzer. Which approach meets the requirements?
Answer: B
Explanation:
Non-802.11 device detection on the 5 GHz band without a dedicated spectrum analyzer is possible through Cisco ' s CleanAir technology, which is embedded as an RF ASIC in many Cisco AP models including the
9120 series. CleanAir operates at the hardware layer - below the 802.11 MAC - enabling the APs to detect, classify, and report non-802.11 interference sources such as cordless phones, microwave ovens, video cameras, radar, and other unlicensed RF emitters in the 5 GHz spectrum. The WLC aggregates CleanAir reports from all APs and provides a consolidated interference device list accessible through the WLC ' s monitoring interface. Since the question specifies the 5 GHz band, the relevant 802.11 protocol for 5 GHz is
802.11a (and its successors 802.11n and 802.11ac). Exporting the list of 802.11a interferers from the WLC using the CleanAir RF ASIC correctly targets the 5 GHz band and identifies non-802.11 devices detected there. Option A incorrectly references 802.11b, which operates only on 2.4 GHz. Options B and C attempt to use the WLAN adapter for non-802.11 detection, but a standard WLAN adapter in monitor mode can only capture 802.11 frames - it cannot detect non-802.11 RF energy without a spectrum analyzer chipset.
Reference: WLSD Study Guide - Cisco CleanAir Technology, Non-802.11 Interference Detection, Post- Deployment Survey Methodology.
NEW QUESTION # 98
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: A
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. Adding local mode APs (Option B) would serve clients and compete for channel capacity. Grouping APs closer (Option C) reduces capacity and increases co-channel interference. Increasing transmit power (Option D) worsens hidden node conditions without improving location accuracy. Reference:
WLSD Study Guide - Cisco Location Services, Monitor Mode APs, Asset Tracking and WLAN Overlay Design.
NEW QUESTION # 99
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