Pass the CWNP CWDP Wi-Fi Design CWDP-305 Questions and answers with CertsForce

Channel bonding is a feature introduced in 802.11n and enhanced in 802.11ac that allows the combination of two adjacent channels to double the channel width, thereby increasing throughput. However, 1x1:1 client devices, which have a single transmit and receive antenna and support only one spatial stream, often lack the capability to utilize channel bonding effectively. These low-end devices are limited in their hardware and cannot take full advantage of the increased bandwidth that channel bonding offers.

Comprehensive and Detailed Explanation:

An LLD (Low-Level Design) document contains technical specifications and granular configuration details about the WLAN infrastructure. This includes VLAN mappings, IP address schemes, and what network devices (e.g., switches or routers) are responsible for routing between VLANs.

“LLD” is the correct type of document to specify VLAN configuration in detail.

“Routing” is the correct function when VLANs must communicate with each other across subnets, and the document should indicate which devices perform inter-VLAN routing.

“The Low-Level Design includes VLAN assignments, routing roles, IP schemas, and all technical details that installers and engineers need to configure the system.”

— CWDP-305 Study Guide, Chapter: Wireless Design Process

In public Wi-Fi environments, it's common to implement security measures that prevent clients from communicating directly with each other. This is achieved through peer-to-peer blocking, also known as client isolation. When enabled, this feature ensures that each client can communicate with the AP and access external networks but cannot interact with other clients on the same WLAN.

This setup enhances security by reducing the risk of attacks or unauthorized access between clients.

Comprehensive and Detailed Explanation:

High channel utilization can be caused by various factors, but one critical issue to rule out is the presence ofan RF signal generator causing a Denial of Service (DoS)attack. Such devices can emit continuous or intermittent signals that occupy the channel, preventing legitimate Wi-Fi communication. Identifying and eliminating such sources is essential for maintaining optimal network performance.

Low PHY rates: Can contribute to increased airtime usage but are not the primary concern in this context.

High workload or frame rates: Indicate heavy usage but not necessarily malicious interference.

Comprehensive and Detailed Explanation:

The current WLAN setup with only two APs supporting over 300 client devices is insufficient and leads to performance degradation. Simply adding more APs without a proper design can cause co-channel interference and other issues. Upgrading Ethernet connections or increasing AP power does not address the core problem of inadequate design for high-density environments. The appropriate action is to redesign the WLAN specifically for the auditorium, considering factors such as client density, application requirements, and RF environment to ensure reliable and efficient Wi-Fi performance.

802.11r Fast Transition (FT) defines two methods to facilitate quick and secure roaming between access points:

Over-the-Air (OTA): The client communicates directly with the target AP to perform the authentication exchange during roaming.

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Over-the-DS (Distribution System): The client communicates with the current AP, which then relays the authentication information to the target AP over the wired network.

Both methods aim to reduce latency during the roaming process, ensuring seamless connectivity for applications sensitive to delays, such as VoIP.

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Comprehensive and Detailed Explanation:

Virtual Private Networks (VPNs) are commonly employed in WLANs for:

Remote AP tunneling to a corporate WLAN controller or VPN concentrator:This allows remote access points (APs) to securely connect back to the corporate network over the internet, ensuring that data traffic is encrypted and secure.

Client device connectivity to corporate resources from unsecured public networks:VPNs enable client devices to securely access corporate resources when connected to public or unsecured networks, protecting sensitive data from potential threats.

USB 3.0 devices and hubs can emit electromagnetic interference (EMI) in the 2.4 GHz frequency band, which is commonly used by Wi-Fi and Bluetooth devices. This interference can elevate the noise floor in the 2.4 GHz band, leading to inaccurate readings during site surveys. Such interference can result in misinterpretation of the RF environment, potentially impacting the design and performance of the WLAN.YouTube

The CWDP-305 Official Study and Reference Guide advises caution when using USB 3.0 devices during site surveys:

"Be aware that USB 3.0 devices can cause interference in the 2.4 GHz band. When conducting site surveys, ensure that equipment used does not introduce additional noise that could skew results."

In environments with high-security restrictions, such as meat processing facilities, it's imperative to obtain the necessary access and clearance before conducting a site survey.This ensures compliance with security protocols and prevents unauthorized access to sensitive areas.

The CWDP-305 Official Study and Reference Guide emphasizes the importance of adhering to site-specific security requirements during site surveys.

When conducting a site survey, accurately determining ceiling heights is crucial for proper AP placement and coverage prediction.If ladder use is restricted, utilizing a laser distance meter provides a precise and cost-effective solution.Laser measures can quickly and safely determine vertical distances without the need for physical elevation.گروه آموزشی و پژوهشی سیب

The CWDP-305 Official Study and Reference Guide emphasizes:

"Laser distance meters are valuable tools during site surveys, allowing for accurate measurements of ceiling heights and other distances without the need for ladders or lifts."