In Cisco mesh networking architecture, access points are classified into two primary roles: Root Access Points (RAP) and Mesh Access Points (MAP). A RAP is an access point that maintains a wired Ethernet backhaul connection back to the network infrastructure, while a MAP operates wirelessly, relying on mesh backlinks to upstream RAPs. When an engineer needs to change an AP mode - such as switching to bridge mode to extend the mesh - the AP role must first be defined correctly. The AP must be designated as a RAP before any mode-level configuration changes are applied. This sequencing is critical because the AP role defines the fundamental backhaul path; changing the mode without first establishing the role results in misconfiguration and potential connectivity loss. The RAP communicates directly with the wired infrastructure via its Ethernet port, making it the gateway for all downstream MAPs in the mesh topology. Options A (monitor), C (bridge), and D (local) refer to AP modes, not roles, and cannot be configured until the role is properly defined.
Reference: WLSD Study Guide - Mesh Networking Fundamentals, Outdoor Wireless Design, AP Role and Mode Configuration.

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 × 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 × 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.

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. Since the existing cabling is already CAT 6A, which supports 10 Gbps over short distances and 5 Gbps over 100 meters, there is no need to replace the wiring (Option D eliminates). The 100-meter distance limitation (Option C) already applies to standard Ethernet and is met by CAT 6A - this is not an action but a constraint check. Option E (55 meters) is only relevant for specific
5GBASE-T configurations and doesn ' t maximize support compared to A and B. Reference: WLSD Study Guide - mGig Infrastructure, 802.11ac Wave 2 Infrastructure Design, Switch Upgrade Planning.

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.

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.