300-110 Exam Dumps and Practice Questions

A pre-site survey questionnaire is used to gather information before the physical survey begins, helping to define design requirements. The two most important information points it should contain are the access point density required and the applications that will run over the wireless network. Access point density (Option C) must be understood early because it depends on the number and types of users in each area, directly influencing the survey approach and AP placement strategy. Applications (Option E) are critical because they define the QoS requirements --- a company developing code may run video conferencing, large file transfers, and real-time collaboration tools, each with distinct bandwidth and latency requirements that shape the RF design criteria. The total number of existing APs (Option A) and the current controller model (Option D) are inventory questions, not design requirement inputs. Client device types (Option B) are important but are a subset of the application question --- applications drive the specific device capability requirements. Reference: WLSD Study Guide --- Pre-Site Survey Requirements Gathering, Customer Questionnaire, Design Requirements Definition.

The design requirements --- optimized performance, interference avoidance, high-density support, and roaming capability --- collectively point to a dual-band strategy using narrow channel widths. For 5 GHz operation (Option A), 20 MHz channels are the correct choice for high-density and campus-scale deployments. The 5 GHz band has a significantly greater number of non-overlapping channels compared to 2.4 GHz (up to 24 non-overlapping 20 MHz channels in UNII-1, UNII-2, and UNII-3), enabling a robust channel reuse plan with minimal co-channel interference. Wider 5 GHz channels (Options C and E --- 80 MHz and 40 MHz) would consume multiple channel blocks, dramatically reducing the number of available non-overlapping channels and increasing co-channel interference in dense deployments. For 2.4 GHz operation (Option B), 20 MHz channels are mandatory --- there are only three non-overlapping 20 MHz channels (1, 6, 11) in the 2.4 GHz band. Using 40 MHz channels in 2.4 GHz (Option D) eliminates all non-overlapping channel separation, causing massive co-channel interference and is universally contraindicated in enterprise designs. Reference: WLSD Study Guide --- Channel Planning, High-Density Design, Frequency Band Selection.

Voice over WLAN (VoWLAN) deployments require a minimum SNR threshold to maintain acceptable Mean Opinion Score (MOS) values for call quality. Cisco's 300-110 WLSD curriculum specifies that VoWLAN requires a minimum SNR of 25 dB throughout the coverage area. In an Ekahau post-deployment survey SNR heatmap, when the heatmap displays a consistent color indicating SNR at or above this threshold across the entire surveyed area --- including all rooms, corridors, and common areas such as the lobby --- the conclusion is that voice service is supported in all locations. The color coding in Ekahau's SNR heatmap uses green tones to indicate adequate SNR (typically 25 dB) and shifts toward yellow and red for degraded conditions. When the exhibit heatmap shows uniform adequate coverage across all surveyed areas without yellow or red zones, it confirms the SNR requirement for VoWLAN is universally met. Options A, B, and C suggest partial or no coverage, which would be indicated by mixed or poor SNR values --- conditions not present in this scenario. The post-deployment survey with Ekahau is the validation step confirming that the predictive design was accurately realized in the physical environment. Reference: WLSD Study Guide --- VoWLAN Design Requirements, SNR Thresholds, Post-Deployment Survey Validation with Ekahau.

In the Cisco Catalyst 9800 IOS XE WLC configuration framework, the site tag serves as the primary organizational and functional grouping element for FlexConnect APs at a given physical location. The site tag defines the FlexConnect site --- a logical boundary within which APs can perform local switching and local inter-AP roaming without requiring CAPWAP tunnel traversal to the WLC for every client handoff. Within a FlexConnect site defined by the site tag, APs can exchange client roaming context information directly with each other (peer-to-peer), enabling fast Layer 2 roaming for clients moving between APs that share the same site tag --- effectively defining the roaming domain for FlexConnect APs at that site. The site tag also references the flex profile (which defines VLAN mappings, local auth settings, and split tunneling parameters) and the AP join profile. Switch port configuration (Option A) is performed on the infrastructure switches, not through the WLC site tag. IP address assignment (Option B) is a DHCP function. Firewall policies (Option C) are applied through ACLs and policy tags, not site tags. Reference: WLSD Study Guide --- Catalyst 9800 Tag Architecture, FlexConnect Site Tag Role, Local Roaming in FlexConnect Deployments.

To focus the coverage heat map on the desired coverage threshold, the engineer should use the RSSI slider to set the heat map to the desired cutoff filter. This action adjusts the display to show only the signal levels that meet or exceed the specified RSSI value, effectively filtering out weaker signals and highlighting areas with sufficient coverage. In Ekahau and similar survey tools, the RSSI slider provides a dynamic way to set minimum signal thresholds, allowing the engineer to quickly validate whether coverage meets design targets such as -67 dBm for voice or -70 dBm for data. Changing the color scheme (Option A) only modifies the visual representation without filtering data. The RSSI calibration tool (Option B) adjusts how the tool perceives signal levels, not the display filter. Filtering by AP (Option D) would remove APs from the view, potentially hiding coverage gaps. Reference: WLSD Study Guide --- Post-Deployment Survey, Ekahau Heat Map Tools, RSSI Coverage Filtering.