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That option concerns WLAN controller redundancy and NAC integration. That follows from the targeted Recommended action: Assess fast roaming within and between AP coverage cells using the configured mobility relationship and authentication requirements.

That option concerns Large campus WLAN AC AP and CAPWAP architecture. That follows from the targeted Recommended action: Assess fast roaming within and between AP coverage cells using the configured mobility relationship and authentication requirements.

This option proposes: Internal routers prefer the intended egress path while the preference stays within the correct autonomous system boundary. It addresses the different topic BGP LOCAL_PREF within one autonomous system, not the directly tested Wireless roaming mobility and session continuity failure in the stated incident (An engineer claims an SSID's roaming design is successful despite every client being forced to obtain a new DHCP lease whenever it changes AP.). The better discriminating check for this case is: Review the client's roam event timestamps, candidate AP signal conditions, reassociation/authentication records and address or session continuity. The targeted correction is: Assess fast roaming within and between AP coverage cells using the configured mobility relationship and authentication requirements.

This option proposes: Validate a wireless user VLAN pool and its DHCP scope availability when client addressing becomes uneven or fails under density. It addresses the different topic WLAN VLAN pools and DHCP address scopes, not the directly tested WLAN controller redundancy and NAC integration failure in the stated incident (An AP loses its preferred AC during an outage and does not join the standby because the discovery and redundancy settings were never tested.).

This option proposes: Assess fast roaming within and between AP coverage cells using the configured mobility relationship and authentication requirements. It addresses the different topic Wireless roaming mobility and session continuity, not the directly tested WLAN controller redundancy and NAC integration failure in the stated incident (An AP loses its preferred AC during an outage and does not join the standby because the discovery and redundancy settings were never tested.).

This option proposes: Choose OSPF summarization at the correct boundary and account for reachability when advertising aggregates. It addresses the different topic OSPF summarization at ABR and ASBR, not the directly tested WLAN controller redundancy and NAC integration failure in the stated incident (An AP loses its preferred AC during an outage and does not join the standby because the discovery and redundancy settings were never tested.).

This option proposes: MQC policy operation separates traffic classifiers, traffic behaviors and policies that bind them on a supported interface and direction; defining a classifier by itself does not apply a traffic action. It addresses the different topic Huawei MQC traffic classification and behavior binding, not the directly tested WLAN controller redundancy and NAC integration failure in the stated incident (An AP loses its preferred AC during an outage and does not join the standby because the discovery and redundancy settings were never tested.).

This option proposes: WLAN roaming is a client transition between APs, and preserving service depends on consistent SSID/security configuration, mobility coordination and the chosen network architecture, not simply RF overlap. It addresses the different topic Wireless roaming mobility and session continuity, not the directly tested WLAN controller redundancy and NAC integration failure in the stated incident (An AP loses its preferred AC during an outage and does not join the standby because the discovery and redundancy settings were never tested.).

This option proposes: In controller-managed WLANs an AP typically discovers and establishes control communication with the AC using CAPWAP, while local or centralized data forwarding depends on the chosen design and correct VLAN mapping. It addresses the different topic Large campus WLAN AC AP and CAPWAP architecture, not the directly tested WLAN controller redundancy and NAC integration failure in the stated incident (An AP loses its preferred AC during an outage and does not join the standby because the discovery and redundancy settings were never tested.).

This option proposes: Inspect AP discovery method, controller address reachability, CAPWAP control state, authorized AP inventory and configured service traffic forwarding mode. It addresses the different topic Large campus WLAN AC AP and CAPWAP architecture, not the directly tested WLAN controller redundancy and NAC integration failure in the stated incident (An AP loses its preferred AC during an outage and does not join the standby because the discovery and redundancy settings were never tested.).

This option proposes: Review VLAN IGMP query source, version, group reports, membership timers and the downstream interface in multicast routing state. It addresses the different topic IGMP querier membership reports and group timeout, not the directly tested WLAN controller redundancy and NAC integration failure in the stated incident (An AP loses its preferred AC during an outage and does not join the standby because the discovery and redundancy settings were never tested.).

This option proposes: Compare WLAN service templates, VLAN pool membership and assignment method, gateway/SVI, relay configuration and per-VLAN available leases. It addresses the different topic WLAN VLAN pools and DHCP address scopes, not the directly tested WLAN controller redundancy and NAC integration failure in the stated incident (An AP loses its preferred AC during an outage and does not join the standby because the discovery and redundancy settings were never tested.).

That option concerns IPsec VPN IKE negotiation versus ESP data channel. That follows from the targeted action: Validate resilient AC roles and per-user access decisions when WLAN controller failure or endpoint authorization affects service.

That option concerns Large campus WLAN AC AP and CAPWAP architecture. That follows from the targeted action: Validate resilient AC roles and per-user access decisions when WLAN controller failure or endpoint authorization affects service.

That option concerns Wireless roaming mobility and session continuity. That follows from the targeted action: Validate resilient AC roles and per-user access decisions when WLAN controller failure or endpoint authorization affects service.

This option proposes: Assess fast roaming within and between AP coverage cells using the configured mobility relationship and authentication requirements. It addresses the different topic Wireless roaming mobility and session continuity, not the directly tested WLAN controller redundancy and NAC integration failure in the stated incident (A campus grants guest Wi-Fi users employee VLAN access after a RADIUS attribute mapping change, despite an NAC policy designed to separate them.).

This option proposes: Trace PIM-SM receiver joins toward an RP and subsequent shortest-path behavior when investigating delayed or suboptimal multicast. It addresses the different topic PIM sparse mode RP shared tree and shortest path transition, not the directly tested WLAN controller redundancy and NAC integration failure in the stated incident (A campus grants guest Wi-Fi users employee VLAN access after a RADIUS attribute mapping change, despite an NAC policy designed to separate them.).

This option proposes: Trace an enterprise wireless AP's registration to its access controller and the separation of management from user traffic in supported forwarding modes. It addresses the different topic Large campus WLAN AC AP and CAPWAP architecture, not the directly tested WLAN controller redundancy and NAC integration failure in the stated incident (A campus grants guest Wi-Fi users employee VLAN access after a RADIUS attribute mapping change, despite an NAC policy designed to separate them.).

This option proposes: WLAN roaming is a client transition between APs, and preserving service depends on consistent SSID/security configuration, mobility coordination and the chosen network architecture, not simply RF overlap. It addresses the different topic Wireless roaming mobility and session continuity, not the directly tested WLAN controller redundancy and NAC integration failure in the stated incident (A campus grants guest Wi-Fi users employee VLAN access after a RADIUS attribute mapping change, despite an NAC policy designed to separate them.).

This option proposes: PIM-DM generally follows a flood-and-prune model, building source-based multicast distribution where an interface without interested downstream receivers can be pruned to reduce unnecessary traffic. It addresses the different topic PIM dense mode flooding and prune mechanisms, not the directly tested WLAN controller redundancy and NAC integration failure in the stated incident (A campus grants guest Wi-Fi users employee VLAN access after a RADIUS attribute mapping change, despite an NAC policy designed to separate them.).

This option proposes: In controller-managed WLANs an AP typically discovers and establishes control communication with the AC using CAPWAP, while local or centralized data forwarding depends on the chosen design and correct VLAN mapping. It addresses the different topic Large campus WLAN AC AP and CAPWAP architecture, not the directly tested WLAN controller redundancy and NAC integration failure in the stated incident (A campus grants guest Wi-Fi users employee VLAN access after a RADIUS attribute mapping change, despite an NAC policy designed to separate them.).

This option proposes: Inspect AP discovery method, controller address reachability, CAPWAP control state, authorized AP inventory and configured service traffic forwarding mode. It addresses the different topic Large campus WLAN AC AP and CAPWAP architecture, not the directly tested WLAN controller redundancy and NAC integration failure in the stated incident (A campus grants guest Wi-Fi users employee VLAN access after a RADIUS attribute mapping change, despite an NAC policy designed to separate them.).

This option proposes: Compare received iBGP routes to the same prefix, LOCAL_PREF values, policy application points and next-hop reachability across edge routers. It addresses the different topic BGP LOCAL_PREF within one autonomous system, not the directly tested WLAN controller redundancy and NAC integration failure in the stated incident (A campus grants guest Wi-Fi users employee VLAN access after a RADIUS attribute mapping change, despite an NAC policy designed to separate them.). The better discriminating check for this case is: Inspect primary/backup controller registrations, AP failover behavior, RADIUS/802.1X results, user authorization attributes and policy applied to a test client. The targeted correction is: Validate resilient AC roles and per-user access decisions when WLAN controller failure or endpoint authorization affects service.

This option proposes: Review the client's roam event timestamps, candidate AP signal conditions, reassociation/authentication records and address or session continuity. It addresses the different topic Wireless roaming mobility and session continuity, not the directly tested WLAN controller redundancy and NAC integration failure in the stated incident (A campus grants guest Wi-Fi users employee VLAN access after a RADIUS attribute mapping change, despite an NAC policy designed to separate them.).

That option concerns IPsec VPN IKE negotiation versus ESP data channel. That follows from the targeted Recommended action: Validate resilient AC roles and per-user access decisions when WLAN controller failure or endpoint authorization affects service.

That option concerns Wireless roaming mobility and session continuity. That follows from the targeted Recommended action: Validate resilient AC roles and per-user access decisions when WLAN controller failure or endpoint authorization affects service.

That option concerns WLAN VLAN pools and DHCP address scopes. That follows from the targeted Recommended action: Validate resilient AC roles and per-user access decisions when WLAN controller failure or endpoint authorization affects service.

This option proposes: Apply OSPF neighbor authentication and passive-interface policy without accidentally suppressing required route advertisements. It addresses the different topic OSPF interface security and passive network advertisement, not the directly tested Campus design versus data center fabric operational boundaries failure in the stated incident (A multinational wants a centrally managed employee campus with many wireless users but a designer selects a server-only VXLAN service topology without considering access authentication.).

This option proposes: Distinguish software-defined network control-plane orchestration from application-aware SD-WAN path selection in an enterprise WAN deployment. It addresses the different topic SDN WAN control and SD-WAN policy forwarding, not the directly tested Campus design versus data center fabric operational boundaries failure in the stated incident (A multinational wants a centrally managed employee campus with many wireless users but a designer selects a server-only VXLAN service topology without considering access authentication.).

This option proposes: Check the MED value and the policy context before using BGP advertisements to suggest which entry link another AS should prefer. It addresses the different topic BGP MED interpretation between neighboring autonomous systems, not the directly tested Campus design versus data center fabric operational boundaries failure in the stated incident (A multinational wants a centrally managed employee campus with many wireless users but a designer selects a server-only VXLAN service topology without considering access authentication.).

This option proposes: An OSPF ASBR originates type 5 external LSAs in eligible areas; E1 metrics account for internal cost toward the ASBR, whereas E2 selection prioritizes external cost except for applicable tie-breakers. It addresses the different topic OSPF external LSAs and E1 versus E2 cost, not the directly tested Campus design versus data center fabric operational boundaries failure in the stated incident (A multinational wants a centrally managed employee campus with many wireless users but a designer selects a server-only VXLAN service topology without considering access authentication.).

This option proposes: A Virtual Routing and Forwarding instance keeps a distinct routing table for assigned interfaces, and inter-VRF connectivity needs explicit appropriate route sharing or security-controlled transit rather than an assumption of global-table access. It addresses the different topic VRF traffic separation and route leaking controls, not the directly tested Campus design versus data center fabric operational boundaries failure in the stated incident (A multinational wants a centrally managed employee campus with many wireless users but a designer selects a server-only VXLAN service topology without considering access authentication.).

This option proposes: SDN-based WAN management centralizes policy orchestration and visibility, while SD-WAN forwarding uses measured underlay links and application or SLA policies to choose paths; controller reachability alone does not guarantee user traffic meets latency targets. It addresses the different topic SDN WAN control and SD-WAN policy forwarding, not the directly tested Campus design versus data center fabric operational boundaries failure in the stated incident (A multinational wants a centrally managed employee campus with many wireless users but a designer selects a server-only VXLAN service topology without considering access authentication.).