CWDP-305 Exam Dumps - CWNP CWDP Wi-Fi Design Questions and Answers

Designing guest access with all guest users tunneled directly into the DMZ has two main advantages: it simplifies the network configuration and it enhances the security of the internal network. A DMZ is a demilitarized zone, which is a separate network segment that isolates the public-facing services from the private network. A DMZ provides a buffer zone between the Internet and the internal network, where potential attacks can be detected and prevented.

By tunneling all guest users directly into the DMZ, the network configuration is simplified because there is no need to segment and filter the guest traffic across the internal LAN. The guest traffic is encapsulated and routed to the DMZ controller, which acts as the anchor point for the guest WLAN. The guest traffic is then decrypted and forwarded to the Internet or the DMZ services. This way, the guest traffic does not mix with the internal traffic, and there is no need to apply VLANs, ACLs, or firewall rules to separate them.

Another advantage of tunneling all guest users directly into the DMZ is that it enhances the security of the internal network. By keeping the guest traffic in the DMZ, the internal network is protected from any potential threats or attacks that may originate from the guest users. The guest users have no visibility or access to the internal network resources, and they are subject to the security policies and controls of the DMZ. The border firewall configuration will not require any additional rules to pass guest traffic to the DMZ controller, because the guest traffic is already encapsulated and tunneled. This reduces the complexity and the risk of misconfiguration of the firewall rules. References: CWNP, CWDP Certified Wireless Design Professional Official Study Guide, Cisco Unified Wireless Guest Access Services, What Is a DMZ Network and Why Would You Use It?, Wireless Guest Access FAQ

The Physical Installation Guide is a document that offers step-by-step instructions for technicians on mounting and configuring access points. It includes details such as mounting locations, orientation, cabling requirements, and configuration settings. This guide ensures that APs are installed consistently and according to the design specifications, which is crucial for optimal network performance. Unlike the Statement of Work or Bill of Materials, which outline project scope and equipment lists respectively, the Physical Installation Guide focuses specifically on the practical aspects of AP deployment.

Site survey adapters are often specialized devices with enhanced sensitivity and performance characteristics compared to standard client Wi-Fi adapters.These specialized adapters can detect weaker signals and provide more detailed RF information, leading to higher RSSI readings during surveys.Consequently, standard client devices may experience lower RSSI values in the same environment.

The CWDP-305 Official Study and Reference Guide notes:MetaGeek Community

"Survey adapters are typically more sensitive than standard client devices, which can result in discrepancies between survey data and actual client experiences."

Project parameters in WLAN design software typically include requirements and constraints like:

Minimum required signal strength (e.g., –67 dBm for VoIP)

Minimum required SNR

Desired data rate coverage

These are configured before design work begins and guide how AP placement and coverage will be modeled.

From CWDP-305:

“Project parameters such as minimum signal strength, data rate, and required SNR must be defined before the actual placement of access points. These values define the target RF environment.”

— Reference: CWDP-305 Official Study and Reference Guide, Chapter on Wireless Design Process

USB 3.0 interfaces are known to generate RF interference in the 2.4 GHz band due to the high-frequency noise emitted by the differential signaling in USB 3.0 cables and ports. This interference can reduce SNR, especially for devices located close to the USB port.

From CWDP-305:

“USB 3.0 cables and ports can emit broadband noise in the 2.4 GHz band, negatively impacting receive sensitivity and SNR. This can distort measurements during protocol analysis or performance testing.”

— Reference: CWDP-305 Official Study and Reference Guide, Chapter on ProtocolandSpectrum Analysis

Band steering is a technique used to encourage dual-band clients to connect to the less congested 5 GHz band. However, some client devices are persistent and may not respond to steering attempts, continuing to probe only on the 2.4 GHz band. To ensure these clients can still connect to the network, band steering algorithms are designed to eventually allow association on the 2.4 GHz band after a certain number of ignored Probe Requests. This approach balances optimal network performance with client compatibility.

Extreme Networks Documentation

In outdoor environments, channel contention, co-channel interference (CCI), and adjacent channel interference (ACI) can negatively affect bridge performance. The most effective method for identifying usable channels is through a site survey, which includes spectrum analysis at both endpoints.

From CWDP-305:

“Performing an outdoor site survey is critical for point-to-point deployments. This reveals existing RF usage in the area, allowing the selection of channels with minimal interference for optimal link stability.”

— Reference: CWDP-305 Official Study and Reference Guide, Chapter on Advanced Site Surveys

If an access point (AP) fails to power up via Power over Ethernet (PoE), but the Ethernet cable functions correctly with other devices, the most probable cause is that the PoE switch has exhausted its power budget.Each PoE switch has a maximum power capacity, and exceeding this limit can prevent additional devices from receiving power.Extreme Networks

The CWDP-305 Official Study and Reference Guide discusses the importance of monitoring PoE budgets during WLAN deployments.

The 6 GHz band, introduced with Wi-Fi 6E (802.11ax), mandates the use of WPA3 security protocols. Specifically, WPA3-Personal and WPA3-Enterprise are required for networks operating in this band. WPA2-Personal is not permitted in the 6 GHz spectrum due to regulatory and security requirements.

Therefore, recommending WPA2-Personal for VoIP support in the 6 GHz band is technically inappropriate, as it does not comply with the mandatory security standards for this frequency range.

Wi-Fi Multimedia (WMM) is a subset of the IEEE 802.11e standard and is essential for enabling Quality of Service (QoS) features in Wi-Fi networks. When WMM is not enabled on an 802.11n WLAN, QoS features are unavailable, which can adversely affect the performance of latency-sensitive applications such as voice over IP (VoIP) and video streaming.گروه آموزشی و پژوهشی سیب

Additionally, certain 802.11n features, like higher data rates and frame aggregation, may not be fully utilized without WMM, leading to suboptimal network performance.