CWDP-305 Exam Results

Comprehensive and Detailed Explanation:

The 5 GHz band offers more non-overlapping channels and is less susceptible to interference compared to the 2.4 GHz band. By moving corporate data clients and VoWiFi devices to the 5 GHz band, the network can achieve better performance and reduced interference, especially for latency-sensitive applications like voice over Wi-Fi.

In large enterprise WLAN deployments, efficient IP address and VLAN assignment is crucial for scalability and performance. Common and recommended methods include:

Static VLAN Assignment per SSID:Each SSID is mapped to a specific VLAN, allowing for straightforward traffic segregation.

Dynamic VLAN Assignment via AAA:Utilizing RADIUS servers to assign VLANs based on user credentials or group memberships provides flexibility and centralized control.

VLAN Pooling:Assigning IP addresses from multiple VLANs in a round-robin fashion helps distribute clients evenly and prevents DHCP exhaustion.

However, assigning VLANs based on real-time radio signal metrics like RSSI or SNR is not a standard or recommended practice. Such metrics are variable and can lead to inconsistent VLAN assignments, complicating network management and potentially affecting client performance.

Comprehensive and Detailed Explanation:

In a 3x3 802.11n configuration supporting two spatial streams over a 20 MHz channel with a short guard interval (400ns), the maximum data rate achievable is 144 Mbps. This is derived from the MCS (Modulation and Coding Scheme) index tables defined in the 802.11n standard, where MCS 15 corresponds to two spatial streams at 64-QAM modulation with a 5/6 coding rate. Therefore, the correct maximum MCS rate for this configuration is 144 Mbps.

Site survey adapters are often specialized devices with enhanced sensitivity and are calibrated for accurate measurements. In contrast, standard client devices may have varying hardware and driver configurations, leading to differences in RSSI readings. Therefore, it's common to observe discrepancies between survey results and actual client experiences. This emphasizes the importance of considering client device capabilities during WLAN design and validation.