BPDU guard is Layer 2 loop protection rather than device power allocation.

Per-port power settings cannot create power that the total switch PoE supply does not have; measure budget and class demand first.

Reducing available power cannot resolve power-denied messages from phones requiring a higher negotiated power class.

An IDS observes rather than forwards between networks. A true general network fact is not necessarily the direct diagnosis. The named change was install an unmanaged layer 2 switch, whose relevant defect is that it bridges Ethernet frames without an intersubnet routing interface.

An AP joins wireless clients to a LAN and does not automatically provide intersubnet routing. It concerns a different proposed change, not the change being evaluated.

Routers use Layer 3 forwarding decisions to connect distinct IP subnets. The statement addresses a different mechanism. Here the engineer specifically proposed install an unmanaged layer 2 switch; the decisive limitation is that it bridges Ethernet frames without an intersubnet routing interface.

Collapsing segmentation is not inter-VLAN routing and removes intended boundaries. It concerns a different proposed change, not the change being evaluated.

Central logging does not move packets between VLANs. The statement addresses a different mechanism. Here the engineer specifically proposed create more access ports on a layer 2-only switch; the decisive limitation is that more bridge ports do not form routed gateways.

A multilayer switch routes between its active VLAN interfaces in hardware. A true general network fact is not necessarily the direct diagnosis. The named change was create more access ports on a layer 2-only switch, whose relevant defect is that more bridge ports do not form routed gateways.

DNS caching does not inspect application payloads for attack signatures. It concerns a different proposed change, not the change being evaluated.

A repeater is not a security inspection control. A true general network fact is not necessarily the direct diagnosis. The named change was mirror all traffic to a passive span receiver, whose relevant defect is that a mirrored capture receives copies without being in the forwarding path.

An inline enforcement device can block matches rather than only report them. That distinction is technically relevant elsewhere, but it does not identify the failure of the proposed mirror all traffic to a passive span receiver. The actual issue is that a mirrored capture receives copies without being in the forwarding path.

A tap observes physical traffic and never advertises an SSID. It concerns a different proposed change, not the change being evaluated.

The AP provides the 802.11-to-Ethernet access path and retains VLAN policy. A true general network fact is not necessarily the direct diagnosis. The named change was connect each laptop directly to an optical line terminal, whose relevant defect is that an OLT is unrelated to enterprise Wi-Fi association.

Address translation does not create the required wireless radio cells. That distinction is technically relevant elsewhere, but it does not identify the failure of the proposed connect each laptop directly to an optical line terminal. The actual issue is that an OLT is unrelated to enterprise Wi-Fi association.

A WLC centralizes policy and AP management in a controller-based WLAN. A true general network fact is not necessarily the direct diagnosis. The named change was use a dns a record for every radio, whose relevant defect is that DNS name resolution is not an AP radio-policy controller.

Segmentation without control-plane reachability can prevent AP management. It concerns a different proposed change, not the change being evaluated.

A hub cannot configure an AP or SSID. This observation would apply to another device or feature, not the proposed use a dns a record for every radio. For this scenario, DNS name resolution is not an AP radio-policy controller is the direct cause.

VLAN tagging concerns traffic classification, not available electrical power. It concerns a different proposed change, not the change being evaluated.

Power over Ethernet injects electrical power on the same copper Ethernet link when standards and budgets match. The statement addresses a different mechanism. Here the engineer specifically proposed replace the cable with single-mode optical fiber alone; the decisive limitation is that passive fiber does not deliver the standard copper PoE power feed.

A neighbor-discovery protocol does not add physical PoE circuitry. A true general network fact is not necessarily the direct diagnosis. The named change was replace the cable with single-mode optical fiber alone, whose relevant defect is that passive fiber does not deliver the standard copper PoE power feed.

An SSID advertises a WLAN and stores no application records. This observation would apply to another device or feature, not the proposed configure a switch mac aging timer as the database service. For this scenario, MAC aging maintains an Ethernet forwarding table, not application data is the direct cause.

LACP aggregates links but cannot answer SQL requests. It concerns a different proposed change, not the change being evaluated.

Servers provide the application service; clients initiate requests to its listener. That distinction is technically relevant elsewhere, but it does not identify the failure of the proposed configure a switch mac aging timer as the database service. The actual issue is that MAC aging maintains an Ethernet forwarding table, not application data.

Routing tables hold forwarding prefixes, not application transactions. This observation would apply to another device or feature, not the proposed turn the access point into the application database. For this scenario, an AP supplies network access rather than the described application logic is the direct cause.

The endpoint initiates traffic; the server-side process accepts and services it. A true general network fact is not necessarily the direct diagnosis. The named change was turn the access point into the application database, whose relevant defect is that an AP supplies network access rather than the described application logic.

Root guard protects a bridge topology and does not implement client software. It concerns a different proposed change, not the change being evaluated.

Stateful inspection correlates return traffic to established flows before policy decisions. That distinction is technically relevant elsewhere, but it does not identify the failure of the proposed use only a passive ethernet splitter. The actual issue is that a splitter does not enforce stateful policy.

ARP maps addresses on a link and does not recognize session state. It concerns a different proposed change, not the change being evaluated.

Removing routing disables required paths without implementing a stateful firewall. This observation would apply to another device or feature, not the proposed use only a passive ethernet splitter. For this scenario, a splitter does not enforce stateful policy is the direct cause.

BPDU guard is Layer 2 loop protection rather than device power allocation. It concerns a different proposed change, not the change being evaluated.

DNS suffixes do not raise the electrical PoE budget. The statement addresses a different mechanism. Here the engineer specifically proposed increase the ospf hello timer; the decisive limitation is that oSPF timers are for routed neighbor formation, not Ethernet power.

Power denial with intact data forwarding is a PoE allocation or class problem. This observation would apply to another device or feature, not the proposed increase the ospf hello timer. For this scenario, oSPF timers are for routed neighbor formation, not Ethernet power is the direct cause.