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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Wireless Site Survey | 25% | - Predictive site survey - Planning tools and network metrics evaluation - Pre-deployment site survey - Material attenuation and its design effects - Post-deployment site survey - Layer 1 site survey analysis - Collect design requirements and evaluate constraints |
| Topic 2: Wired and Wireless Infrastructure | 30% | - Design for data, voice, video, location - Logical infrastructure requirements - Design wireless bridging (mesh) - Design high-density wireless networks - Design radio management - Physical infrastructure requirements |
| Topic 3: Mobility | 25% | - Optimize client roaming - Validate mobility tunneling - Design mobility groups - Site Tags |
| Topic 4: WLAN High Availability | 20% | - Design AP high availability - Design controller high availability |
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NEW QUESTION # 78
A customer has multiple WLCs running in N+1 redundancy with APs load balanced between the WLCs. The customer performs AP failover testing between the WLCs and notices that some of the APs do not move back to their primary WLC after it recovers. What are two points that must be addressed in the design? (Choose two.)
Answer: A,C
Explanation:
In an N+1 redundancy deployment, an AP ' s ability to return to its designated primary WLC after that controller recovers depends on two distinct configuration requirements working in concert. First, the AP Fallback feature (Option C) must be enabled on the WLC. AP Fallback instructs APs to monitor the availability of their configured primary controller and automatically reconnect to it when it becomes available again, rather than remaining permanently joined to the N+1 backup controller. Without AP Fallback enabled, APs stay connected to whichever controller they most recently joined. Second, the APs must have their primary WLC information correctly configured (Option D). If an AP does not have the primary controller ' s name, IP address, or FQDN correctly set, it cannot identify when its designated primary has recovered and therefore cannot initiate a return fallback. DHCP Option 43 (Option A) is used for initial AP discovery only.
Secondary WLC configuration (Option B) addresses failover direction but not the return path. AP failover priority (Option E) controls which APs are moved first during a failover event, not whether fallback occurs.
Reference: WLSD Study Guide - N+1 Redundancy Design, AP Fallback Configuration, Controller Primary, Secondary and Tertiary Assignment.
NEW QUESTION # 79
An engineer is implementing a wireless design for a manufacturing company with a Catalyst
9800, a stack of two Catalyst 9300-48HX switches, and 9166 APs. Each AP must be named using the Zone-053424189-01X string where X is the area number. The engineer needs to connect the APs to the switch stack using PoE. How many APs must the engineer connect to the stack so that they run with full functionality?
Answer: D
Explanation:
The Cisco Catalyst 9300-48HX is a high-density PoE switch specifically designed for Cisco Catalyst 9100 Series AP deployments. The 48HX variant features 48 Multi-Gigabit PoE ports with IEEE 802.3bt (PoE++) support, providing up to 90W per port. The Cisco 9166 Access Point is a Wi-Fi 6E AP that requires IEEE 802.3bt (PoE++) power to achieve full radio functionality -- enabling all three radios including the 6 GHz radio. In a two-switch stack of 48HX units, the total PoE budget is designed and rated to support full-port utilization with Cisco 9100 series APs simultaneously. The design intent is to connect APs to all ports on all switches -- maximizing the deployment density and ensuring every AP runs with full functionality. Connecting to only half the ports on one switch (Option B), half of each switch (Option C), or all ports on only one switch (Option D) would underutilize the infrastructure and fail to achieve the full deployment density that the switch stack was architected to deliver. The AP naming scheme requiring sequential area numbering requires all APs to be connected and fully operational across the entire stack.
NEW QUESTION # 80
An engineer is designing the wired infrastructure to support VoWLAN. Which QoS design should be applied to the switch ports connecting the APs?
Answer: A
Explanation:
In a centrally switched CAPWAP deployment, client traffic is encapsulated between the AP and the controller, and the AP copies the QoS marking from the inner client packet into the DSCP field of the outer CAPWAP header. If the switch port connecting the AP does not trust DSCP, the switch rewrites those markings to zero at ingress and every voice packet loses its priority treatment for the remainder of its journey across the wired network. Trusting DSCP on the AP- facing port preserves the marking end to end and allows the campus queueing policies to place voice into the priority queue. Trusting CoS is ineffective here because the AP-to-switch link is typically an access port carrying untagged frames with no 802.1p field to trust. Leaving the port untrusted or policing it aggressively strips or drops the very traffic the design is intended to protect, and omitting trust configuration on a switch that defaults to untrusted produces the same failure.
NEW QUESTION # 81
An engineer must configure the virtual IP address on multiple controllers in a mobility group. Which rule must the engineer follow to ensure proper roaming?
Answer: B
Explanation:
In a Cisco wireless mobility group, all Wireless LAN Controllers (WLCs) must be configured with the same virtual IP address to ensure proper roaming. The virtual IP address is a Layer 3 construct used by wireless clients during the DHCP renewal process when roaming between subnets managed by different WLCs. All WLCs in the same mobility group use the same virtual IP (typically from the unused 1.1.1.0/24 or similar non- routable space) so that clients receive consistent DHCP server responses regardless of which controller they are associated with. If different virtual IP addresses were used (Option B), clients roaming between controllers would experience DHCP failures during inter-controller roaming because the DHCP server address seen by the client would change. Options A and C relate to DNS hostname configuration, which is useful for AP discovery but does not affect the roaming behavior of client devices. The virtual IP address consistency across all mobility group members is a fundamental requirement for seamless inter-controller roaming. Reference: WLSD Study Guide - Mobility Group Configuration, Virtual IP Address, Inter- Controller Roaming Requirements.
NEW QUESTION # 82
An engineer is performing a Layer 1 passive wireless site survey utilizing a channel analyzer software in the 2.4 GHz spectrum. Which chart indicates the ratio of interference present during the duration of the capture?
Answer: B
Explanation:
In a Layer 1 passive wireless site survey using a channel analyzer tool (such as Metageek Chanalyzer or Cisco Spectrum Expert) in the 2.4 GHz spectrum, the chart that indicates the ratio of interference present during the capture duration is the Duty Cycle chart. The duty cycle chart displays the percentage of time that detected energy -- including both Wi-Fi and non-Wi-Fi signals
-- is present on each channel. A high duty cycle on a channel indicates that the channel is occupied by transmissions for a significant portion of time, reducing available airtime for Wi-Fi clients. This chart directly communicates the ratio of interference because it shows what fraction of the observation period had detectable RF energy above the noise floor. Signal strength charts show amplitude (how strong), while duty cycle charts show temporal occupancy (how often) -- the latter is the correct metric for quantifying interference ratio.
NEW QUESTION # 83
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