Important Cisco 300-110 WLSD Exam Questions

Answer: A

Explanation:

This question requires straightforward wireless capacity engineering calculation. The total throughput requirement is 100 users 1 Mbps per user = 100 Mbps aggregate. Each channel in the design can support 20 Mbps of usable throughput --- this is the per-cell, per-channel allocation defined in the design parameters, representing usable throughput prior to RF overhead as stated in the question. The number of channels required is therefore: total required throughput divided by throughput per channel = 100 Mbps 20 Mbps per channel = 5 channels. In practice, each channel corresponds to a non-overlapping frequency assignment in the 5 GHz band. With 5 channels and 20 Mbps per channel, the design provides exactly 100 Mbps of aggregate capacity for 100 concurrent users at 1 Mbps each. This calculation methodology is foundational to Cisco's high-density WLAN design approach, where the number of spatial streams, channel allocations, and AP placement are all derived from the per-user throughput requirement multiplied by the concurrent user population. Reference: WLSD Study Guide --- High-Density WLAN Capacity Planning, Per-User Throughput Calculation, Channel Planning and Spatial Reuse.

Answer: C

Explanation:

The Cisco WLAN site survey methodology follows a structured, sequential process. The initial walkthrough --- sometimes called the discovery or orientation phase --- is the first step, during which the engineer physically tours the facility to understand its physical characteristics: building materials, structural layout, potential AP mounting locations, wiring closet positions, and environmental factors. After completing the initial walkthrough, the next logical phase is the predeployment survey (also referred to as a pre-deployment or predictive survey). The predeployment survey uses the information gathered during the walkthrough to create a detailed design plan --- either through a manual AP placement plan or a predictive survey tool such as Ekahau, where floor plans are annotated with materials and attenuation values and APs are virtually placed to model coverage. The predeployment survey output is the design document that drives the actual physical installation. A post-deployment survey (Option A) validates coverage after installation --- it cannot precede deployment. Active and passive surveys (Options B and D) are physical measurement techniques conducted either pre-deployment (with temporary APs) or post-deployment (with installed APs) --- they do not logically follow immediately after a walkthrough before any design work is done. Reference: WLSD Study Guide --- WLAN Site Survey Process, Predeployment Survey Phase, Airport Wireless Design Considerations.

Answer: C

Explanation:

For a high-density classroom deployment using 5 GHz with channel bonding in groups of two (40 MHz channels), the correct configuration is to set the channel width for 802.11a (5 GHz) to 40 MHz and set the 24 Mbps data rate to Mandatory. Channel bonding refers to combining two adjacent 20 MHz channels into a single 40 MHz channel, doubling the channel width. Since the requirement specifies 5 GHz operation (where high-density design is appropriate), this must be applied to the 802.11a radio profile, not 802.11b (which operates only on 2.4 GHz). Setting 24 Mbps as Mandatory ensures that APs transmit management frames (beacons, probe responses, and other control frames) only at 24 Mbps --- this is how the 'only allow APs to send 802.11 management frames at 24 Mbps' requirement is implemented. Setting it as Supported (Options B and D) would allow the AP to use lower rates for management frames. Options A and D incorrectly target 802.11b, which does not support 40 MHz channels. Reference: WLSD Study Guide --- High-Density WLAN Design, 802.11a Channel Configuration, Data Rate and Channel Width Settings.

Answer: C

Explanation:

The Cisco Catalyst 9800 IOS XE WLC uses a tag-based configuration architecture. Three primary tag types are used: site tags, policy tags, and RF tags. The site tag associates an AP with its operational context and contains two specific profile references: the AP join profile (defining AP-level parameters such as NTP, syslog, SSH, LED behavior, and CAPWAP timers) and the flex profile (defining FlexConnect-specific parameters including locally switched VLANs, split tunneling, local authentication settings, and VLAN-ACL mappings). The flex profile within the site tag enables the AP to operate in FlexConnect mode with locally configured switching behavior when WLC connectivity is lost. QoS (Option A) policies are applied at the policy tag level within WLAN policies. NAT (Option B) is not a native profile type in the 9800 tag architecture. VLAN (Option D) configurations are defined within the flex profile or policy profile and are not standalone profile types at the tag level. Understanding the three-tag model is essential for designing and troubleshooting 9800-based deployments. Reference: WLSD Study Guide --- Catalyst 9800 Configuration Model, Site Tag Architecture, Flex Profile and AP Join Profile.

Answer: D

Explanation:

Cisco WLC AP Failover Priority governs the order in which APs are processed when a WLC recovers and APs begin re-associating. The priority levels are: Critical, High, Medium, and Low. During recovery situations, the WLC will accept and process AP join requests in order of priority --- Critical priority APs are processed first, before all other priority levels. In a deployment where the WLC is located in a remote data center connected via WAN, the join process for all APs is slower due to WAN latency and potential bandwidth constraints. Under these conditions, assigning Critical priority to executive office APs ensures they are at the front of the processing queue and restore service before lower-priority APs. The executive office designation implies business-critical operations requiring the fastest possible wireless restoration --- a requirement that directly maps to the Critical priority level. High priority (Option A) would position the executive APs second in the queue behind any Critical priority APs. Medium (Option B) and Low (Option C) would place them further down the processing order. Reference: WLSD Study Guide --- AP Failover Priority Configuration, N+1 and SSO Redundancy Design, WAN-Linked Controller Deployments.