Free Cisco 300-110 Exam Dumps October 2026

The requirement for users to retain their session state and IP address when roaming between buildings managed by different WLCs is a Layer 3 roaming scenario. In Cisco's wireless architecture, IP address preservation across controller boundaries is achieved through inter-controller mobility --- specifically the foreign-anchor mobility tunnel mechanism. When a client roams from Building A (WLC-A) to Building B (WLC-B), WLC-B becomes the foreign controller and WLC-A becomes the anchor controller. WLC-B tunnels the client's traffic back to WLC-A, allowing the client to retain its original IP address even while physically associated to an AP managed by WLC-B. This requires a mobility tunnel between WLC-A and WLC-B with both controllers configured in the same mobility group name --- the group name is the trust identifier that permits the mobility tunnel and anchor-foreign relationship to form. Without the same group name, the controllers will not form a trusted mobility peer relationship. AP groups (Option C) control SSID and VLAN assignments per AP cluster but have no impact on inter-controller roaming. HA cluster configuration (Option B) creates SSO redundancy, not roaming capability between separate N+1 controllers. Redundancy port connection (Option D) is used for SSO keepalive and state sync, not mobility tunneling. Reference: WLSD Study Guide --- Inter-Controller Mobility, Mobility Tunnels, Layer 3 Roaming and IP Address Preservation.

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.