The primary concern when upgrading to 802.11ac Wave 2 capable APs with existing switches that only provide IEEE 802.3at (PoE+, 30W maximum) is the output power limitation. 802.11ac Wave 2 APs, particularly Cisco ' s 3800 and 4800 series, can require significantly more power than 30W to operate all radios and capabilities at full capacity. The Wave 2 standard introduced features such as Multi-User MIMO (MU-MIMO), beamforming, and additional spatial streams, all of which increase power consumption. When an AP doesn ' t receive sufficient power, it may reduce transmit power, disable radios, or reduce the number of spatial streams - directly degrading wireless performance. Interface throughput (Option A) may also be a concern with multi-gigabit capable APs, but the question specifically asks about the limitation introduced by
802.3at, which is directly a power delivery constraint. Collision domains (Option C) and high availability (Option B) are unrelated to the PoE standard. Reference: WLSD Study Guide - PoE Upgrade Planning,
802.11ac Wave 2 Infrastructure Requirements, Switch Power Budget Considerations.

In Cisco ' s guest anchor WLC deployment model, multiple anchor controllers can be configured in a DMZ to provide redundancy for guest WLAN traffic. The anchor priority value determines which anchor controller is preferred for establishing the guest mobility tunnel from the foreign WLC. Cisco ' s anchor priority system assigns the highest preference to the lowest numerical priority value. Priority 1 is the highest priority, meaning the foreign WLC will prefer Anchor1 when establishing the CAPWAP mobility tunnel for anchoring guest client traffic. Priority 2 would be assigned to Anchor2, and Priority 3 to Anchor3, creating a deterministic failover hierarchy. If Anchor1 becomes unreachable, the foreign controller automatically falls over to Anchor2, then to Anchor3. Priority 0 is not a valid anchor priority value in the Cisco WLC configuration. This design pattern is critical for enterprise guest deployments where DMZ anchor redundancy must be maintained without manual intervention. Reference: WLSD Study Guide - Guest Wireless Architecture, Anchor WLC Configuration, Mobility and DMZ Design.

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.

In Ekahau Site Survey ' s multi-floor predictive modeling workflow, alignment points are the critical mechanism that allows the software to understand the precise vertical spatial relationship between floors in a multi-story building. Once floor plans are imported with their scale correctly defined, alignment points must be placed on each floor at the same real-world physical location - such as a stairwell corner, elevator shaft, or structural column - so that Ekahau can accurately calculate vertical signal propagation and inter-floor RF bleed. Without alignment points, the software has no spatial reference to determine which area on Floor 2 is directly above a given point on Floor 1, making floor-to-floor signal bleed calculations geometrically impossible. Drawing coverage areas (Option A) is a post-AP-placement activity. Starting the auto planner (Option B) would attempt to place APs without the required spatial reference. Choosing AP models (Option D) is a subsequent step. Alignment points are a fundamental requirement for any predictive survey involving multi-floor buildings. Reference: WLSD Study Guide - Ekahau Predictive Survey Methodology, Multi- Floor Building Configuration, Signal Propagation Modeling.

The eping command is used on Cisco Wireless LAN Controllers to verify that the redundancy peer in a Stateful Switchover (SSO) pair of controllers is up and connected. This command sends ECHO packets (EoIP echo packets) to the peer controller to ensure the data path connectivity is functioning. In an SSO configuration, eping verifies the EoIP tunnel between the active and standby controllers, which is critical for state synchronization and seamless failover. If eping succeeds, it confirms that both the network path and the EoIP data encapsulation between the controllers are functional. The standard ping command (Option B) tests basic IP connectivity but does not validate the EoIP data path used by the SSO redundancy mechanism. The mping command (Option D) tests mobility control path connectivity between mobility group peers, not the SSO redundancy path. The rping command (Option A) is not a standard Cisco WLC command for testing SSO peer connectivity. Reference: WLSD Study Guide - WLC SSO Troubleshooting, eping Command, Redundancy Peer Connectivity Validation.