Comprehensive and Detailed Explanation:
Increasing capacity in a coverage-based wireless network involves optimizing the network to handle more clients and traffic efficiently. The recommended techniques include:
A: Maximize airtime usage by disabling lower data rates:Disabling lower data rates (e.g., 1 Mbps, 2 Mbps) reduces the time the medium is occupied by slower transmissions, thereby increasing overall network efficiency and capacity.
B: Add additional APs and use directional antennas:Deploying more access points (APs) with directional antennas helps in segmenting the coverage area, reducing co-channel interference, and increasing capacity by allowing more simultaneous transmissions in different directions.
D: Lower power on the access points and, after careful planning, add more APs:Reducing the transmit power of APs minimizes overlap and interference between cells. After careful planning, adding more APs ensures coverage continuity and increases capacity by distributing the load among more APs.
C: Turn up power on the access points:Increasing the transmit power can lead to excessive overlap between cells, causing interference and reducing overall network capacity. Therefore, this is not a recommended practice for increasing capacity.
Reference:CWDP-305 Study Guide, Chapter on Infrastructure Design - Capacity Planning Techniques.

The Bill of Materials (BoM) is a comprehensive list that details all the components, devices, and parts required for the deployment of a WLAN infrastructure.It serves as a critical document for procurement and ensures that all necessary items are accounted for before the deployment begins.
The CWDP-305 Official Study and Reference Guide emphasizes the importance of the BoM in the design and deployment process:
"Create, distribute, and communicate design documentation - Bill of Materials (BoM)"NWExam Reference: CWDP-305 Official Study and Reference Guide, Chapter on Wireless Design Process

When the WLAN controller and APs reside on different subnets, a router is required to facilitate communication between them. The router enables Layer 3 routing, allowing the APs to discover and communicate with the controller across subnet boundaries.
Reference: CWDP-305 Official Study Guide, Chapter on Infrastructure Design

Understanding both the physical layout and logical configuration of the network is critical. The two most helpful documents for that are:
Blueprints:Provide the architectural layout of the facility, including walls, materials, and structural elements that affect RF propagation.
Network Closet Locations:Identify where networking equipment such as switches and patch panels are located for physical cabling and AP backhaul planning.
From CWDP-305:
"Accurate blueprints and physical infrastructure documentation, such as IDF/MDF locations, are essential for physical and logical WLAN planning."
- Reference: CWDP-305 Official Study and Reference Guide, Chapter on Wireless Design Process