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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.).

This option proposes: Inspect orchestrator policy distribution, WAN link health metrics, site tunnel status, application SLA thresholds and actual selected forwarding path. 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: Review broadcast-network designated-router election based on interface priority and router ID, noting that a stable election does not automatically preempt. It addresses the different topic OSPF broadcast DR and BDR election, 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: 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 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 cloud infrastructure team must connect thousands of virtual workloads across racks, yet a proposal relies on a single broadcast VLAN extending everywhere without fabric scalability analysis.).

This option proposes: Validate physical stack links, member roles and split-brain safeguards before considering a multi-switch logical chassis redundant. It addresses the different topic Switch stacking clustering and split-brain risk, not the directly tested Campus design versus data center fabric operational boundaries failure in the stated incident (A cloud infrastructure team must connect thousands of virtual workloads across racks, yet a proposal relies on a single broadcast VLAN extending everywhere without fabric scalability analysis.).

This option proposes: Troubleshoot a site-to-site IPsec tunnel by separating IKE security-association establishment from protected ESP payload transport. It addresses the different topic IPsec VPN IKE negotiation versus ESP data channel, not the directly tested Campus design versus data center fabric operational boundaries failure in the stated incident (A cloud infrastructure team must connect thousands of virtual workloads across racks, yet a proposal relies on a single broadcast VLAN extending everywhere without fabric scalability analysis.).

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 Campus design versus data center fabric operational boundaries failure in the stated incident (A cloud infrastructure team must connect thousands of virtual workloads across racks, yet a proposal relies on a single broadcast VLAN extending everywhere without fabric scalability analysis.).

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 cloud infrastructure team must connect thousands of virtual workloads across racks, yet a proposal relies on a single broadcast VLAN extending everywhere without fabric scalability analysis.).

This option proposes: Rapid Spanning Tree Protocol reduces convergence time by exchanging proposal/agreement information on eligible links and maintaining alternate paths, while only the root and designated forwarding ports should carry traffic in a stable tree. It addresses the different topic RSTP port roles and rapid convergence, not the directly tested Campus design versus data center fabric operational boundaries failure in the stated incident (A cloud infrastructure team must connect thousands of virtual workloads across racks, yet a proposal relies on a single broadcast VLAN extending everywhere without fabric scalability analysis.).

This option proposes: Inspect the active RIB prefix and mask, BGP network or import-route configuration, route-policy matches and outbound Adj-RIB-Out to the peer. It addresses the different topic BGP route origin network and redistribution policy, not the directly tested Campus design versus data center fabric operational boundaries failure in the stated incident (A cloud infrastructure team must connect thousands of virtual workloads across racks, yet a proposal relies on a single broadcast VLAN extending everywhere without fabric scalability analysis.).

This option proposes: Inspect the originating ASBR, type 5 LSA, external metric type and metric, cost toward the ASBR and actual selected external next hop. 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 cloud infrastructure team must connect thousands of virtual workloads across racks, yet a proposal relies on a single broadcast VLAN extending everywhere without fabric scalability analysis.).

This option proposes: Inspect orchestrator policy distribution, WAN link health metrics, site tunnel status, application SLA thresholds and actual selected forwarding path. 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 cloud infrastructure team must connect thousands of virtual workloads across racks, yet a proposal relies on a single broadcast VLAN extending everywhere without fabric scalability analysis.).

This option proposes: Choose the appropriate enterprise datacom architecture for a campus user edge versus a scalable data-center fabric before selecting a particular routing or switching feature. It addresses the different topic Campus design versus data center fabric operational boundaries, not the directly tested SDN WAN control and SD-WAN policy forwarding failure in the stated incident (An enterprise moves branch connectivity to dual Internet and MPLS circuits, but voice traffic still follows the congested path because the SD-WAN application SLA policy is missing.).

This option proposes: Ensure consistent MST region name, revision and VLAN-to-instance mapping before expecting switches to share the same spanning-tree instance topology. It addresses the different topic MSTP region and VLAN-to-instance mappings, not the directly tested SDN WAN control and SD-WAN policy forwarding failure in the stated incident (An enterprise moves branch connectivity to dual Internet and MPLS circuits, but voice traffic still follows the congested path because the SD-WAN application SLA policy is missing.).

This option proposes: Troubleshoot a site-to-site IPsec tunnel by separating IKE security-association establishment from protected ESP payload transport. It addresses the different topic IPsec VPN IKE negotiation versus ESP data channel, not the directly tested SDN WAN control and SD-WAN policy forwarding failure in the stated incident (An enterprise moves branch connectivity to dual Internet and MPLS circuits, but voice traffic still follows the congested path because the SD-WAN application SLA policy is missing.).

This option proposes: SNMP managers request device state, while traps and informs carry event notifications; SNMPv3 offers user-based authentication and optional privacy protection unlike insecure shared-community assumptions. It addresses the different topic SNMP manager polling traps and authenticated operation, not the directly tested SDN WAN control and SD-WAN policy forwarding failure in the stated incident (An enterprise moves branch connectivity to dual Internet and MPLS circuits, but voice traffic still follows the congested path because the SD-WAN application SLA policy is missing.).

This option proposes: MP-BGP EVPN advertises service information in appropriate address-family route types, such as MAC/IP reachability via Type 2 and IP prefix routes via Type 5, while the underlay must still carry VTEP reachability. It addresses the different topic MP-BGP EVPN route types and forwarding separation, not the directly tested SDN WAN control and SD-WAN policy forwarding failure in the stated incident (An enterprise moves branch connectivity to dual Internet and MPLS circuits, but voice traffic still follows the congested path because the SD-WAN application SLA policy is missing.).

This option proposes: Campus designs emphasize user access, WLAN, segmentation and availability, whereas data-center networks commonly emphasize scalable east-west service reachability, underlay/overlay design and high-density automated provisioning. It addresses the different topic Campus design versus data center fabric operational boundaries, not the directly tested SDN WAN control and SD-WAN policy forwarding failure in the stated incident (An enterprise moves branch connectivity to dual Internet and MPLS circuits, but voice traffic still follows the congested path because the SD-WAN application SLA policy is missing.).

This option proposes: Compare RP reachability, (*,G) and (S,G) state, PIM join or register messages and RPF interfaces before changing the multicast design. It addresses the different topic PIM sparse mode RP shared tree and shortest path transition, not the directly tested SDN WAN control and SD-WAN policy forwarding failure in the stated incident (An enterprise moves branch connectivity to dual Internet and MPLS circuits, but voice traffic still follows the congested path because the SD-WAN application SLA policy is missing.).

This option proposes: Compare traffic patterns, device role, access-layer services, user or workload segmentation, resiliency goals and the underlying control-plane topology. It addresses the different topic Campus design versus data center fabric operational boundaries, not the directly tested SDN WAN control and SD-WAN policy forwarding failure in the stated incident (An enterprise moves branch connectivity to dual Internet and MPLS circuits, but voice traffic still follows the congested path because the SD-WAN application SLA policy is missing.).

This option proposes: Inspect route sources, redistribution boundaries, attached route tags, candidate best paths and which protocol is currently advertising the problem prefix. It addresses the different topic Route redistribution feedback loops and route tags, not the directly tested SDN WAN control and SD-WAN policy forwarding failure in the stated incident (An enterprise moves branch connectivity to dual Internet and MPLS circuits, but voice traffic still follows the congested path because the SD-WAN application SLA policy is missing.).

This option proposes: Choose the appropriate enterprise datacom architecture for a campus user edge versus a scalable data-center fabric before selecting a particular routing or switching feature. It addresses the different topic Campus design versus data center fabric operational boundaries, not the directly tested SDN WAN control and SD-WAN policy forwarding failure in the stated incident (A managed WAN has healthy controller registration but data traffic between two sites fails because their transport tunnels and route advertisements are not established.).

This option proposes: Review broadcast-network designated-router election based on interface priority and router ID, noting that a stable election does not automatically preempt. It addresses the different topic OSPF broadcast DR and BDR election, not the directly tested SDN WAN control and SD-WAN policy forwarding failure in the stated incident (A managed WAN has healthy controller registration but data traffic between two sites fails because their transport tunnels and route advertisements are not established.).

This option proposes: Use a carefully scoped Huawei IP prefix list to match the intended route ranges and prefix lengths before applying an import or export policy. It addresses the different topic IP prefix filtering and exact route-match conditions, not the directly tested SDN WAN control and SD-WAN policy forwarding failure in the stated incident (A managed WAN has healthy controller registration but data traffic between two sites fails because their transport tunnels and route advertisements are not established.).

This option proposes: Campus designs emphasize user access, WLAN, segmentation and availability, whereas data-center networks commonly emphasize scalable east-west service reachability, underlay/overlay design and high-density automated provisioning. It addresses the different topic Campus design versus data center fabric operational boundaries, not the directly tested SDN WAN control and SD-WAN policy forwarding failure in the stated incident (A managed WAN has healthy controller registration but data traffic between two sites fails because their transport tunnels and route advertisements are not established.).

This option proposes: Large WLAN deployments can distribute users among VLANs with a VLAN pool, but every selected VLAN still needs the correct gateway, DHCP scope and forwarding path to support client sessions. It addresses the different topic WLAN VLAN pools and DHCP address scopes, not the directly tested SDN WAN control and SD-WAN policy forwarding failure in the stated incident (A managed WAN has healthy controller registration but data traffic between two sites fails because their transport tunnels and route advertisements are not established.).

This option proposes: Huawei ACL filtering considers rule order and match criteria; permit or deny decisions depend on the traffic-filter feature and where the ACL is applied, so a symmetric assumption about directions can be wrong. It addresses the different topic ACL traffic filter placement and rule order, not the directly tested SDN WAN control and SD-WAN policy forwarding failure in the stated incident (A managed WAN has healthy controller registration but data traffic between two sites fails because their transport tunnels and route advertisements are not established.).

This option proposes: Check whether the interface should form neighbors, its authentication mode, passive state, advertised prefix and neighboring device visibility. It addresses the different topic OSPF interface security and passive network advertisement, not the directly tested SDN WAN control and SD-WAN policy forwarding failure in the stated incident (A managed WAN has healthy controller registration but data traffic between two sites fails because their transport tunnels and route advertisements are not established.).

This option proposes: Compare traffic patterns, device role, access-layer services, user or workload segmentation, resiliency goals and the underlying control-plane topology. It addresses the different topic Campus design versus data center fabric operational boundaries, not the directly tested SDN WAN control and SD-WAN policy forwarding failure in the stated incident (A managed WAN has healthy controller registration but data traffic between two sites fails because their transport tunnels and route advertisements are not established.).

This option proposes: Compare the area link-state database, LSA type, advertising router, ABR reachability and route installation for the absent prefix. It addresses the different topic OSPF router network and summary LSA scope, not the directly tested SDN WAN control and SD-WAN policy forwarding failure in the stated incident (A managed WAN has healthy controller registration but data traffic between two sites fails because their transport tunnels and route advertisements are not established.).