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DHCP snooping relies on differentiating trusted paths toward legitimate DHCP servers from untrusted endpoint-facing ports where rogue responses could appear. It is not a requirement to trust all interfaces indiscriminately; doing so would remove the filtering boundary. A properly scoped design typically trusts only the ports through which authorized server messages should enter.

DHCP snooping can be enabled for selected legitimate VLAN IDs including VLAN 55, subject to switch-platform support and configuration. VLAN 1 is not a universal requirement for inspecting server and client DHCP traffic. Moving users to another VLAN would alter segmentation without correcting which ports are permitted to originate DHCP server replies.

Spanning tree is a separate Layer 2 loop prevention mechanism that can operate alongside DHCP snooping. Disabling STP across a switched LAN may create dangerous loops and broadcast storms. The rogue DHCP problem should be addressed through DHCP snooping trust boundaries rather than by removing loop protection from the topology.

Mask 255.255.255.0 specifies a /24 destination, which is narrower than the requested 10.204.8.0/22 allocation. Although that route might reach part of the intended network, it would omit addresses in the other three constituent /24 blocks. Static routing must use the correct prefix and next hop for the required full destination range.

A /22 destination mask is correct, but Null0 is a discard interface rather than the specified reachable neighboring router 192.0.2.2. A summary route to Null0 is sometimes used to prevent routing loops, yet by itself it would drop matching packets instead of forwarding them to the branch. The problem explicitly requires next-hop delivery over Gi0/2.

Mask 255.255.248.0 is /21, covering a larger eight-/24 block than the desired /22. It could capture destinations beyond the intended remote network and change forwarding for adjacent prefixes. Even with a valid next hop, the route is incorrectly broad; the appropriate /22 mask has third octet 252.

An OSPF neighbor is a Layer 3 routing-protocol peer formed between suitable router interfaces, not a way to accelerate spanning-tree convergence on a workstation switchport. Assigning a user-facing Layer 2 port an OSPF standby role is not ordinary Cisco configuration. The reported need concerns a local access-port state transition, not exchange of IP routes.

Root Guard protects designated ports from accepting superior bridge information that could unexpectedly change the STP root position. It does not serve as the edge-port fast-forwarding setting for an ordinary workstation. On a genuine edge port, PortFast handles rapid forwarding, while additional protection may include BPDU Guard if an unauthorized bridge appears.

Disabling STP throughout the access and distribution network removes a key safeguard against Layer 2 loops and broadcast storms. One user PC needing faster link activation is not a reason to turn off the spanning-tree system on all other switching paths. Apply the designated edge feature narrowly while retaining normal network loop prevention.

chmod 644 /etc/hosts changes access permissions on a local hosts file and has no direct function for predicting which next hop the Linux kernel will use for a destination. Altering file permissions is also a state-changing administrative operation. The requested check should inspect the installed routing decision, not change unrelated local file metadata.

dig -t MX requests mail-exchanger DNS records for a name, rather than the local IP routing decision toward 198.51.100.34. It could help troubleshoot email routing but cannot reveal the kernel's selected source IP, outgoing interface and next-hop path for this packet. DNS name resolution and IP route selection are separate operations.

arp -d attempts to delete a neighbor-cache entry, changing local state and potentially triggering another address resolution. It does not calculate the full destination route chosen by the kernel. ARP concerns translating an on-link IPv4 next hop to a MAC address after a route decision has identified that neighbor, so it is the wrong first tool for this query.

A default static route sends unmatched IPv4 destinations toward a chosen next hop; it has no syntax or effect for setting OSPF router identity on a switchport access interface. The ip route command belongs in global routing configuration and serves forwarding, while the router-id setting belongs to the OSPF routing process. Mixing these concepts would not stabilize router identification.

logging buffered controls whether syslog messages are retained in a device's memory log and at what capacity or severity, not the OSPF process identifier. A process number identifies a local OSPF instance, whereas the router ID is a distinct 32-bit value advertised to peers. Changing logging settings cannot prevent router ID changes caused by interface address selection.

switchport voice vlan defines a voice VLAN on a suitable Layer 2 access interface, usually for a telephone that tags its voice frames. It does not participate in OSPF router-ID selection. An interface VLAN setting may affect network reachability but cannot replace the explicit identifier configured under the routing process.

HTTP DELETE normally requests removal of the resource identified by its URL, not creation of a new member in a policy collection. Calling DELETE on /policies would carry destructive semantics and could be rejected or dangerously interpreted by an implementation. A create request should use the method defined by that API, commonly POST for a collection endpoint.

HTTP GET is intended for retrieving a resource representation without requesting a state change. Supplying a JSON body that attempts to overwrite a collection conflicts with the method's ordinary safe read semantics and may be ignored or rejected. Use a documented write method with authorization when the application needs to create configuration rather than merely inspect existing policies.

HEAD is used to request response headers without a representation body, often for metadata or existence checks. It is not an ordinary method for sending a new-policy JSON document to create a configuration object. The desired operation changes server state, whereas HEAD is supposed to be safe and read-oriented; the proper endpoint method must follow the controller's specification.

An IPsec tunnel can provide packet confidentiality and integrity across a network path, whereas a DNS A record supplies an address mapping. A client resolving app.example.test may subsequently establish a separate protected connection, but DNS itself does not encrypt all application payloads. Conflating name resolution with tunneling can obscure the actual transport security controls.

OSPF is an interior routing protocol used by routers to compute reachability based on link-state information and path costs. DNS resolution does not choose the kernel's forwarding next hop or compare OSPF metrics. Once the client obtains the application's IPv4 address, its local network stack and routers perform subsequent forwarding decisions independently of the A record lookup.

ARP resolves a directly attached IPv4 neighbor or next hop to a link-layer address; it does not normally deliver the host's subnet mask as a response to a DNS lookup. Address and mask configuration usually comes from static settings or DHCP. An A-record answer is an application naming result, not the interface configuration mechanism mentioned in this choice.

Authentication verifies an administrator's identity, but it does not by itself create a durable log of privileged commands executed after login. A username may be valid while the organization still lacks a record of who invoked reload and when. The requirement explicitly asks for an audit trail of an action, not just proof that a session initially authenticated.

A DHCP lease renewal records or updates an interface's IP address parameters and lease state. It does not associate a management command with an authenticated administrator or generate a privileged-execution audit record. A switch can renew its management lease independently of whether anyone is connected to its CLI, so this does not answer the accountability requirement.

Authorization determines whether an authenticated user may perform a privileged operation, including potentially restricting reload. It is important to prevent unauthorized disruption but is not a substitute for recording the action after it occurs. A command could be allowed correctly yet leave no persistent evidence if accounting is disabled or its log destination is unavailable.

Static NAT maps an IP address through a translating gateway; it cannot determine which Wi-Fi channels a radio scans or make the AP detect rogue transmitters. AP management addressing may require routing to the controller, but that is distinct from the radio's operating mode. Changing NAT configuration will not replace a controller's RF-monitoring behavior.

OSPF designated-router election is a Layer 3 routing-process function on certain multi-access segments and does not control an 802.11 radio's scanning duty cycle. An access switch's routing neighbors may support connectivity to the controller, but they do not turn a client-serving AP into a monitor sensor. WLAN monitoring is configured through AP and controller features.

Local mode is a common operating role for a Cisco lightweight AP serving associated clients, and it may perform some background scanning depending on implementation. The requirement is to prioritize dedicated detection rather than client service, so Monitor mode is the clearer fit. Saying Local mode has no scanning support at all is also too broad for many Cisco platforms.

A static default route controls how unmatched IP destinations are forwarded and is unrelated to identifying electromagnetic interference from a nearby microwave appliance. Even if the wireless controller is reached through a router, a Layer 3 path change cannot determine which radio-frequency bands are being disrupted. The symptom occurs despite healthy wired uplinks, pointing toward RF investigation.

PoE budgets affect whether powered wired or wireless endpoint devices receive enough electrical power, but increasing supply to every printer does not reveal microwave-generated 2.4 GHz interference. A power deficiency would tend to produce device resets or inadequate supply symptoms instead of time-correlated wireless connection loss near one appliance. The first investigation should measure the RF environment.

The SSID is a wireless network identifier advertised to clients; its character count does not alter the airwaves occupied by nearby interference sources. Changing it may force client profile updates without improving signal quality or channel utilization. A network can advertise a perfectly valid SSID while a non-Wi-Fi transmitter degrades the same frequencies.

VRRP does not allocate data VLANs from endpoint DNS hostnames. VLAN assignment is a Layer 2 access and policy design function, while first-hop redundancy maintains a common gateway address on an existing IP subnet. A host may obtain its VLAN through separate access-control features, but that behavior is not the reason routers participate in VRRP.

A virtual router can assume a failed peer's gateway identity only if another member is functioning and can forward traffic. VRRP cannot compensate for a complete lack of an upstream route or a disconnected network beyond the gateway. Default-gateway failover and end-to-end routing availability are related but distinct design concerns.

IPsec keys provide encryption and authentication material for protected tunnels and are not automatically rotated merely because VRRP changes which router owns a LAN's virtual gateway. A design might coordinate VPN state during high availability, but VRRP itself is not an IPsec key-management system. The protocol's core task is first-hop virtual router redundancy.