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OSPF metric and administrative distance serve different decisions. Metrics compare eligible paths within a routing protocol, while AD compares route sources to an identical prefix. A reachable static route with AD 5 is preferred to the OSPF source AD 110.

Same-prefix candidates are not necessarily equal-cost installed next hops. The significant AD difference normally causes one source to win rather than mixing static and OSPF forwarding by default. ECMP requires multiple eligible next hops under applicable selection rules.

Default AD values may make connected or static entries preferable to OSPF, but administrators can override the static distance as this scenario does. IOS uses the configured AD for comparing the same prefix, not an unchangeable preference for dynamic protocols.

UDP provides datagrams without built-in acknowledgment, ordered delivery or retransmission guarantees. Applications can implement reliability above UDP, but the prompt explicitly wants transport-layer loss recovery. That behavior is supplied by TCP rather than raw UDP.

ICMP echo assists diagnostics and basic reachability checks, but it does not provide an ordered application byte stream, congestion/flow control and data retransmission. A successful ping is not proof a complete accounting file was transferred.

Local MAC learning chooses how switches forward frames on a VLAN; it does not acknowledge application bytes across routed networks. A damaged or missing segment may require retransmission at a transport or application layer. TCP directly addresses the stated file-transfer requirement.

The passphrase authenticates clients but does not determine which subnet authorized guests receive. The reported fault is guest traffic landing in the wrong VLAN, not a failed security handshake. Update and verify interface/VLAN mapping while maintaining an appropriate authentication policy.

Radio width affects RF capacity and interference but does not select a client subnet. Guests are already joining the SSID; the incorrect outcome occurs after association when traffic enters the wrong wired VLAN. Fix the WLAN mapping, not RF bandwidth.

The SSID is the network's advertised name and is not a VLAN assignment. Renaming it could confuse clients but would not correct the staff-subnet placement. The controller must associate the WLAN with the intended guest VLAN and secure downstream connectivity.

The /16 mask describes 172.20.0.0/16, a much broader range than the specified /24. It could redirect traffic for other 172.20 subnets incorrectly. A route to the precise remote branch network requires mask 255.255.255.0.

The proposed next hop is not the remote neighbor identified by the scenario; it is the local transit-side address in the illustrative topology. Static routes must direct packets to an appropriate reachable next hop toward the destination. Using oneself cannot provide the intended branch forwarding path.

This targets R1's already local LAN rather than the missing branch destination. It could create confusing alternative route behavior without installing the required prefix. Use the actual remote LAN 172.20.40.0/24 as the static destination.

This reverses the syslog priority numbering. It would cause administrators to filter the wrong events and potentially discard critical device failures. Interpret the numeric levels using the defined severity names rather than assuming larger numbers mean greater urgency.

Syslog messages do have numeric severity categories, and operators can use them to control recording or forwarding volume. MAC addresses identify Layer 2 interfaces, which are unrelated to the syslog priority field. The collector's threshold must use the standard severity ordering.

Facility commonly categorizes the source or subsystem of a syslog message, whereas severity carries the urgency level. Collectors can use both for routing and filtering. Ignoring severity would prevent the stated critical-only retention behavior.

HTTPS port 443 is unrelated to SSH and does not implement the requested source-network restriction. An extended ACL could filter by protocols and ports if needed, but the stated rule simply differentiates source networks for management access.

Cisco standard IPv4 ACL entries examine source address, not the packet destination. Reinterpreting the source-based rule as a destination match could permit unintended clients or block the wrong traffic. The 192.0.2.0/24 value describes authorized management clients.

Port security operates at the switch Layer 2 port/MAC level and does not specify which routed source subnets may open a VTY session. Remote SSH sources may traverse routers, so the correct control is a management-plane IP source restriction.

PATCH expresses a partial modification of a resource and may be rejected or trigger changes depending on the API contract. An empty body does not turn it into a safe read. GET is the appropriate method for inspecting current inventory.

DELETE represents removal of a target resource, not reading its inventory. Issuing it on a management API could be destructive if the credentials permit that action. The requirement explicitly prohibits changes, so a retrieval method is needed.

POST frequently creates subordinate objects or starts operations. It does not provide the usual safe, read-only collection lookup and might change the controller's inventory. Use the published GET endpoint for the resource list rather than inventing objects.

Standard HSRP group operation has active and standby roles and a single active gateway for that group, unlike designs that use multiple groups or other load-balancing approaches. Assuming simultaneous unrestricted forwarding ignores role coordination and can cause misdiagnosis.

HSRP preserves a virtual IP across active/standby failover; no automatic per-client DHCP gateway reconfiguration is required.

The purpose of a first-hop redundancy virtual address is to avoid requiring host default-gateway changes during member failover. A surviving participant assumes the virtual role. Clients should still use the same virtual IP rather than learn a new physical interface address.

Those boundaries describe a /24, not the /26 configured on the host. A /26 creates four separate 64-address blocks within the /24. Treating all 256 addresses as one subnet would incorrectly include hosts from unrelated /26 segments.

The pair would imply a 32-address /27 range, not a 64-address /26. The configured prefix covers .64 through .127, so .95 is an ordinary usable host address. Always derive the block size from the prefix length.

The individual host IP is neither the subnet network nor the directed broadcast. The last usable host in this /26 is .126, while .127 is the broadcast. Network boundary selection is based on masked bits, not the observed client address.

That would put untagged data traffic into the voice network rather than preserve the intended separation. The PC should remain in data VLAN 15 while phone media and signaling use the designated voice VLAN, subject to the site's QoS and security policies.

A normal desktop is not an interswitch trunk peer and is not intended to negotiate multiple VLANs through DTP. The phone/access-port design uses a data VLAN and a configured voice VLAN instead of relying on dynamic trunk negotiation from an endpoint.

An IP phone can tag frames for its voice VLAN, and the access port must explicitly support that separate voice mapping from the PC data VLAN.

A switch still needs appropriate MAC learning for ordinary client forwarding. DHCP snooping examines DHCP message direction and ingress trust state; broadly disabling MAC learning would harm client connectivity without explicitly enforcing authorized DHCP server behavior.

Allowing unsolicited server replies from untrusted endpoints defeats the primary anti-rogue-server purpose. Clients might receive a malicious router or DNS server. The feature should classify client-facing ports as untrusted and allow server-originated responses only from authorized sources.

NAT changes IP address translation, not the Layer 2 trust decision required to stop rogue DHCP offers. It could even hide the origin of the unauthorized response. DHCP snooping is designed to discard the wrong message on an untrusted ingress port.