CCNA 200-301 v2 (200-301) — Questions 226–300

Converting all access ports to trunks is unnecessary and incorrect because host-facing ports should remain access ports assigned to a single VLAN. Trunks are used to carry multiple VLANs between switches, not to connect end hosts. This change would not enable inter-VLAN routing.

Making both VLANs use the same IP subnet would break the fundamental purpose of VLANs, which is to separate broadcast domains and logically segment the network. Hosts in different VLANs must be in different subnets for proper routing; otherwise, they would expect to communicate directly at Layer 2, which is not possible across VLANs.

Disabling Spanning Tree Protocol (STP) on both VLANs would not enable inter-VLAN routing; it would only risk creating Layer 2 loops and broadcast storms. STP is a loop-prevention mechanism and has no role in Layer 3 routing between VLANs.

Option A incorrectly states that adjacency formation has failed. FULL state actually indicates a successful adjacency, and the /DR suffix refers to the neighbor’s role, not failure.

Option C is incorrect because exchanging only link-state requests happens in earlier OSPF states, not in FULL adjacency, which means all exchanges are complete.

Option D is invalid because the output shows native OSPF neighbor information, not BGP redistribution, so the neighbor is not learned through BGP.

Assuming that a protocol mismatch might exist without checking the existing configuration first.

Prioritizing a Layer 1 check over a Layer 2 parameter that must be identical for EtherChannel to bundle.

Confusing STP port states with EtherChannel negotiation states.

The IPv6 static route should use a fully specified next-hop (IPv6 address) rather than just an exit interface to avoid recursive routing failures.

Floating static routes require a higher administrative distance (e.g., 200) so they are only used when the primary route is unavailable.

A fully specified IPv6 static route includes both the exit interface and the next-hop IPv6 address to ensure proper routing.

Standard IPv4 ACLs only filter traffic based on the source IP address and cannot filter by destination IP or TCP/UDP port numbers, making this option incorrect for the question's requirements.

Prefix lists are used primarily for route filtering in routing protocols and do not filter traffic based on Layer 4 port numbers or destination IP addresses, so this option is incorrect.

Native VLAN ACLs apply to traffic within a VLAN but do not provide the granular filtering capabilities involving source/destination IP and port numbers, so this option is not correct.

Candidates assume that OSPF adjacency failures on Ethernet links are often due to network type mismatches, without considering that the default settings match.

Candidates may remember that duplicate router‑IDs break OSPF and jump to this conclusion without first analyzing the simpler configuration issue.

Many students learn that timer mismatches are a common OSPF problem and may incorrectly assume they are the cause when the real issue is a basic configuration oversight.

The ports are already configured with LACP active mode, as indicated by the protocol being LACP and the ports being bundled. Reapplying this command does not address the root cause of intermittent connectivity, which is likely due to VLAN mismatch.

The 'lacp rate fast' command changes the LACP packet transmission rate to every second, which is used for faster failure detection. It does not affect VLAN consistency or cause intermittent connectivity; the issue is likely due to VLAN mismatch, not LACP rate.

The ports are already configured as trunk ports (the Po1 is Layer2 and trunking is implied). Reapplying 'switchport mode trunk' does not address the VLAN inconsistency that causes intermittent connectivity.

Both routers are explicitly in OSPF area 0, so they are not in different areas.

OSPF neighbor formation does not depend on matching hostnames; router IDs and interface parameters are what matter.

Since the routers can ping each other, IP reachability exists, indicating the subnet mask is not preventing OSPF multicast packets from being delivered.

The 'show wlan summary' output explicitly shows the WLAN status as 'Enabled', so the WLAN is not disabled. A disabled WLAN would prevent associations, but that is not the case here.

The output shows PSK is enabled with a passphrase 'Cisco123', so a pre-shared key is configured. Missing PSK would cause authentication failures, but that is not the issue here.

CCKM is a fast roaming method that is optional for client association. Clients can associate without CCKM support; it only affects roaming performance, not initial association.

Static routes do not always override dynamic routes; route selection is based on administrative distance. OSPF has a default AD of 110, which is lower than 200, so the OSPF route is preferred. The statement that static routes always win is incorrect because AD values determine preference.

Routers install only the best route (lowest AD) for a given destination in the routing table, unless equal-cost multipath (ECMP) is configured with identical metrics. Since OSPF and static routes have different ADs, they are not installed simultaneously; only the OSPF route is used.

The router does not remove the OSPF route because the static route has a manually configured distance. The OSPF route has a lower AD (110) than the static route's AD (200), so OSPF remains the preferred route and stays in the routing table.

This misinterprets AD: after the primary route is gone, any route with a higher AD (i.e., lower numeric value) is no longer present, so the floating static route should be installed if reachable.

Permanent is rarely needed and does not make a route usable when the interface is down; it only keeps the routing table entry present, but traffic cannot be forwarded.

Changing a static route metric is not possible, and even if it were, it would not change the fact that the specified interface is down.

The specific factual error is that the pool address 203.0.113.2 and static mapping to 203.0.113.3 are valid and do not need changing.

The specific factual error is that PAT does not allow inbound connections initiated from outside; static NAT is required for that purpose.

The specific factual error is that the inside interface IP is part of the 192.168.1.0/24 network and should not be changed; the ACL should be adjusted instead.

An OSPF area mismatch prevents routers from forming a full adjacency; they typically remain in the INIT or 2-WAY state, not EXSTART. The EXSTART state indicates that the routers have already exchanged Hello packets and are attempting to negotiate the master/slave relationship, which requires matching area IDs.

Duplicate router IDs cause OSPF to behave unpredictably, often resulting in flapping adjacencies or multiple neighbors with the same ID, but they do not typically cause a stuck EXSTART state on a single link. The routers would still progress through the states, but the adjacency may be unstable.

A missing default route on R2 does not affect OSPF adjacency formation. OSPF neighbors exchange routing information using multicast Hello and DD packets, which do not require a default route. The adjacency process is independent of the routing table content.

The ipconfig /all command displays detailed IP configuration, including DNS servers and MAC addresses, but does not show active network connections or sessions. Since the client can ping the gateway, IP configuration is likely correct, and this command does not help identify issues with active sessions to the web server.

The tracert command performs a route trace to the destination, which requires Layer 3 reachability. Since ping to 192.168.1.100 already failed, tracert will likely also fail and does not provide information about active connections or listening ports. It is useful for identifying where packets are dropped along the path, but not for verifying active sessions.

The ping -t command sends continuous ICMP echo requests to test reachability over time, but it does not reveal connection states or listening ports. Since ping already failed, continuous pings will also fail and do not help identify issues with active TCP sessions to the web server.

The priority value is higher than the default, which would make R1 active instead of standby.

The decrement value does not match the required 20; it is 30.

The tracked interface is wrong; it should be GigabitEthernet0/1, not GigabitEthernet0/0.

CAPWAP is a control and provisioning protocol for wireless access points and controllers, not a WAN encapsulation for serial links. It operates at the application layer and is used in wireless LAN architectures, not for point-to-point data-link connections.

SNMP is an application-layer protocol for network management and monitoring, used to collect statistics and configure devices. It does not provide data-link layer encapsulation or establish point-to-point connections over serial links.

STP is a Layer 2 protocol that prevents loops in Ethernet switched networks by blocking redundant paths. It has no role in WAN serial links, which are point-to-point and inherently loop-free.

Incorrect because DELETE is the HTTP method used to remove resources. GET does not delete or alter the endpoint or its data, so this option misrepresents REST API semantics.

Incorrect because replacing or updating a resource is typically done with the PUT method. GET does not modify or replace resources, so this option confuses method purposes.

Incorrect because forcing a device into PPP mode is a configuration action unrelated to REST API method semantics. GET calls do not trigger operational mode changes.

The ACL used by NAT should match the inside local addresses that need to be translated, typically using a permit statement. If the ACL denies inside addresses, no traffic will be matched for translation, causing NAT to fail. The correct ACL should permit the inside network.

PAT (Port Address Translation) does not require DHCP on any interface. PAT translates multiple private IP addresses to a single public IP using different port numbers, and it works independently of how IP addresses are assigned. DHCP is only needed if the interface needs to obtain an IP address dynamically.

NAT overload (PAT) is independent of the routing protocol used. It works with static routes, OSPF, EIGRP, or any other routing protocol. The routing protocol only affects how packets are forwarded, not how NAT translates addresses.

Option A is incorrect because version control systems do not replace authentication for API clients. Authentication is handled by security protocols and credentials, not by version control.

Option C is incorrect because version control does not assign VLANs or perform any real-time network configuration tasks; it only manages the files that define such configurations.

Option D is incorrect because discovering neighboring devices at Layer 2 is a network function performed by protocols like CDP or LLDP, not by version control systems.

A trunk port is designed to carry traffic for multiple VLANs between switches, not for a single end host. Using switchport mode trunk on an access port would allow multiple VLANs and enable trunk negotiation, violating the requirement.

The dynamic desirable mode actively attempts to form a trunk with the connected device using DTP. This allows trunk negotiation, which contradicts the requirement to not negotiate trunking and to forward traffic for only one VLAN.

The no switchport command converts the Layer 2 switch port into a Layer 3 routed port, which does not operate as a switch port and cannot be assigned to a VLAN. This is used for routing between VLANs, not for connecting an end host to a single VLAN.

The specific factual error: The GET URI is missing ?content=nonconfig, and the Accept header should be application/yang-data+json. The error for wrong Accept is 406, not 404.

The specific factual error: The YANG module path should be ietf-interfaces:interfaces/interface=..., not Cisco-IOS-XE-native:interface/.... The error for wrong path is 404, not 406.

The specific factual error: The Accept header must be application/yang-data+json; application/json is not acceptable and returns 406, not 404.

A duplex mismatch occurs after auto-negotiation completes; no 'auto-negotiation failed' message appears on the interface.

Duplex mismatch causes errors and retransmissions, usually reducing the effective input rate, not increasing it.

Duplex mismatch keeps the line protocol up; it affects data integrity but not the Layer 1/2 link state.

The default route is incorrect because it is the least specific route and only used when no other matching routes exist; here, more specific routes are available.

The OSPF route to 10.1.1.0/24 is less specific than the /25 static route, so it is not selected despite matching the destination IP address.

The OSPF route to 10.1.0.0/16 is the least specific among the options and will not be chosen when more specific routes like /24 or /25 exist.

The IPv6 subnet mismatch prevents direct connectivity; R1 and R3 must be on the same subnet for a ping to work without additional routing.

The requirement explicitly states that the IPv6 address must be derived using EUI-64; a manually specified interface ID violates this.

The IPv6 subnet must be the same as R3's for direct connectivity; using a different subnet requires additional routing, which is not configured.

Disabling DAI on all VLANs globally removes ARP spoofing protection network-wide, which is excessive and reduces security unnecessarily. The question requires a targeted fix, so this option is incorrect.

Trusting the user-facing printer access port for DHCP snooping and DAI is too permissive and can allow malicious ARP packets, weakening security. It is not recommended as a best practice or exam answer.

Changing the printer to use a larger MTU does not affect ARP packet validation or DAI behavior. MTU size is unrelated to ARP inspection, so this option is irrelevant and incorrect.

The specific factual error is that the default route configuration is correct as given; there is no need to modify it. Changing the AD of the default route could cause routing issues.

The specific factual error is swapping the administrative distances: the primary route should have a lower AD than the floating route. Here, the primary route has AD 150 and the floating route has AD 1, causing the backup to be preferred.

The specific factual error is that static routes without an AD default to 1, so both routes would have equal AD. The floating route must have a higher AD (e.g., 150) to act as a backup.

802.1Q is an open IEEE standard. Cisco-proprietary trunking is Inter-Switch Link (ISL).

Layer 2 switches cannot route between VLANs. Inter-VLAN routing requires a Layer 3 device such as a router or a Layer 3 switch with SVIs.

Trunk ports forward tagged frames so the receiving switch can distinguish VLANs. Removing tags from all frames would defeat the purpose of trunking.

Candidates think any absence of dynamic entries is due to ACL mismatch, overlooking the prerequisite that the inside interface must be configured with ip nat inside for NAT to function at all.

The presence of static NAT translations in the output indicates that the ip nat outside command is already applied on the WAN interface.

Candidates may focus on the static entries, but the symptom is missing dynamic translations; bad static mappings would not prevent dynamic translations from appearing.

The specific factual error: 'logging trap 7' is not a valid Cisco IOS command; the correct command uses the keyword 'debugging'. Also, the NTP server command alone does not fix the source interface issue.

The specific factual error: 'logging trap warnings' only sends messages with severity 0-4, missing severity 5-7 (notifications, informational, debug).

The specific factual error: 'ntp update-calendar' is not needed for NTP synchronization; the source interface is the key missing piece. 'logging trap informational' does not include debug messages.

This places the adjacency in area 1, not area 0 as required, and does not fix the timer mismatch on R2.

This does not fix the hello/dead timer mismatch; MTU is already matching at 1500.

This leaves the hello interval mismatched (10 vs 5) and alters the dead interval unnecessarily; R2 needs hello interval set to 5, not dead interval.

The specific factual error: An administrative distance of 255 is reserved for routes that are not considered valid; they are not installed in the routing table.

The specific factual error: The permanent keyword forces the route to stay in the routing table regardless of reachability, which is the opposite of what is needed.

The specific factual error: The AD values determine route preference; swapping them changes which route is preferred but does not address the removal of the route when the next-hop is unreachable.

The subnet 192.168.22.128/28 includes addresses 192.168.22.128 to 192.168.22.143. The host address 192.168.22.145 is outside this range, so it does not belong to this subnet.

The subnet 192.168.22.160/28 includes addresses 192.168.22.160 to 192.168.22.175. The host address 192.168.22.145 is below this range, so it cannot be in this subnet.

The subnet 192.168.22.148/28 is not a valid subnet because the network address must be a multiple of the subnet size (16). Valid network addresses for /28 are 0, 16, 32, 48, etc. 148 is not a multiple of 16, so this is not a valid subnet.

10.10.10.0 is the network address of the 10.10.10.0/25 subnet (range 0-127), but the host IP 10.10.10.130 is not in that range. The /25 mask creates two subnets: 10.10.10.0/25 and 10.10.10.128/25, and .130 belongs to the latter.

10.10.10.64 is not a valid network address for any /25 subnet derived from 10.10.10.0/24. A /25 subnet has a block size of 128, so the network addresses are multiples of 128: 0 and 128. 64 is a multiple of 64, which would be a /26 boundary, not /25.

10.10.10.255 is the broadcast address for the 10.10.10.128/25 subnet, not the network address. The broadcast address is the last address in the subnet (all host bits set to 1), while the network address is the first address (all host bits set to 0).

Incorrect because programming forwarding tables on switches is a southbound API function, not northbound.

Incorrect because a physical management port does not define API direction and is unrelated to northbound or southbound APIs.

Incorrect because wireless uplinks are physical connections and do not represent API communication directions.

Incorrect because the client already successfully joins and authenticates to the SSID, so SSID visibility is not the issue.

Incorrect because BGP autonomous system numbers relate to routing protocols and have no impact on wireless client roaming or connectivity.

Incorrect because ACL wildcard masks affect packet filtering rules and do not influence wireless roaming or client mobility between access points.

DHCP address assignment is typically handled by dedicated DHCP servers or routers, not by the WLC. While the WLC can act as a DHCP relay or integrate with DHCP, it does not assign per-host addresses as a core function for every WLAN.

STP root bridge election is a Layer 2 switching function performed by switches in the campus network, not by a WLC. The WLC operates at higher layers and does not participate in STP processes.

The WLC does not replace Layer 2 switching functions; it focuses on wireless control and management. Switches still handle VLANs, STP, and forwarding in the access layer, while the WLC manages APs and wireless traffic.

The access list is used to define which inside local addresses are eligible for NAT. If the access list were misconfigured, the router would not create translations for those hosts. However, the scenario states that translations are present, indicating that the access list is correctly matching the internal hosts.

If the outside interface were missing the 'ip nat outside' command, the router would not perform NAT on outbound traffic at all, resulting in no translations being created. Since translations are present, this command is correctly configured.

Similar to option C, if the inside interface were missing the 'ip nat inside' command, no translations would be created. The presence of translations indicates that the inside interface is correctly configured.

Metrics from different routing protocols are not comparable because each protocol uses its own metric calculation (e.g., OSPF uses cost based on bandwidth, EIGRP uses composite metric based on bandwidth and delay). The router uses administrative distance to choose between routes from different protocols, not metric values.

A router installs only the best route to a destination in the routing table, unless equal-cost load balancing is configured. Since OSPF and EIGRP have different administrative distances, only the route with the lower AD is installed. Both routes cannot be installed simultaneously for the same prefix.

The router does compare routes from different protocols using administrative distance, not metrics. Since the metrics are from different protocols, they are not directly comparable, but the router still selects one route based on AD. Therefore, one route will be installed.

The absence of a speed command on the access port does not prevent VLAN forwarding or connectivity to the default gateway. Speed settings affect physical link parameters but not VLAN membership or Layer 2 forwarding.

VTP transparent mode controls VLAN propagation between switches but does not affect whether a VLAN exists locally. Missing VLANs must be created manually regardless of VTP mode.

DTP desirable mode is used to negotiate trunk links and is irrelevant for access ports, which do not trunk and only carry untagged frames for a single VLAN.

The specific factual error: The key is already correct as per the scenario; the problem is the missing AAA group definition.

The specific factual error: The port already has 802.1X enabled, so re-enabling it does not fix the authentication failure.

The specific factual error: The server is reachable, so connectivity is not the problem.

The specific factual error is that standard ACLs cannot filter by protocol (ICMP). They only match source IP addresses.

The specific factual error is that the ACL statement has the source and destination swapped, and it is applied on the wrong interface (G0/0 instead of G0/1).

The specific factual error is that the existing ACL 10 is too permissive and is applied on the wrong interface (G0/0 inbound) to filter traffic from R3 to R2. It must be removed to enforce the new restrictions.

The ACL is applied on the wrong interface; it should be applied inbound on G0/0, not G0/1.

The ACL is applied in the wrong direction; it should be inbound, not outbound.

The ACL is applied on an extra interface (G0/1) that is not required, which may block legitimate traffic.

The OSPF route to 10.10.10.0/24 matches the destination IP but has a shorter prefix length (/24) than the static route (/25). Since longest prefix match is the primary rule, this route is not used.

The default route 0.0.0.0/0 is the least specific and is only used when no other route matches the destination IP. Since more specific routes exist, the default route is not selected.

It is incorrect that packets are dropped due to overlapping routes. Cisco routers allow overlapping static and OSPF routes and forward packets based on the most specific prefix match, so the packet is not dropped.

Incorrect because automatic VLAN assignment for management traffic is unrelated to user identity or accountability; it concerns network segmentation, not administrative tracking.

Incorrect because route summarization efficiency deals with optimizing routing tables and has no connection to user account management or security accountability.

Incorrect because wireless roaming performance relates to client mobility and access point behavior, which does not involve administrative account design or accountability.

This option is incorrect because a static route with an administrative distance of 250 does not override the OSPF default route, which has a lower AD of 110. The high AD prevents immediate override.

This option is incorrect because the static default route does not cause the router to ignore all default routes. Instead, it remains as a backup and only becomes active if the OSPF route disappears.

This option is incorrect because administrative distance does not change the route prefix or convert a default route into a host route. It only influences route preference and selection.

Root Guard prevents a port from becoming a root port by blocking superior BPDUs but does not shut down the port immediately. It is designed to maintain the root bridge position, not to disable ports upon accidental switch connections.

PortFast allows a port to transition quickly to the forwarding state, reducing STP convergence time. However, it does not disable the port if a BPDU is received, so it does not meet the requirement to shut down the port immediately.

Loop Guard prevents a port from transitioning to forwarding if BPDUs are lost, protecting against unidirectional link failures. It does not disable the port upon receiving BPDUs and therefore does not meet the requirement.

The command 'switchport trunk allowed vlan 30' is used on trunk ports to specify which VLANs are allowed to traverse the trunk link. It does not assign a VLAN to an access port; instead, it filters VLANs on a trunk, which is not appropriate for a port connected to a single PC.

The command 'encapsulation dot1Q 30' is used on a router subinterface to enable 802.1Q trunking and specify the VLAN for that subinterface. It is not a valid command on a switch access port, and switch ports do not use encapsulation commands for VLAN assignment.

The command 'ip helper-address 30' is used to configure DHCP relay on a router or Layer 3 switch interface, forwarding DHCP broadcasts to a DHCP server. It has nothing to do with VLAN assignment on a switch port.

The OSPF 10.0.0.0/8 route is less specific than the static 10.10.0.0/16 route. Since the router uses longest-prefix match, the broader /8 route is not selected for traffic destined to 10.10.20.1.

The default route would only be used if no more specific matching routes exist. Since both OSPF and static routes match, and the static route is more specific, the default route is not used here.

Overlapping networks are common in routing tables and do not prevent route selection. The router resolves overlapping prefixes by choosing the longest-prefix match, so this option is incorrect.

The exhibit shows both switches have native VLAN 1 configured, so there is no mismatch. A native VLAN mismatch would cause all VLAN traffic to fail or be misdirected, not just a single VLAN.

Since other VLANs are working across the same trunk, the trunk encapsulation (802.1Q) is functioning correctly. Changing to ISL would not fix the issue and would break connectivity for all VLANs.

A VLAN does not need to be the native VLAN to traverse a trunk; native VLAN is only for untagged traffic. Making VLAN 30 the native VLAN would not solve the problem and could introduce other issues.

Option A incorrectly suggests that tokens replace the need for an IP address on the client. IP addresses are fundamental for network communication and routing, and tokens do not substitute for them. This misunderstanding confuses network-layer addressing with application-layer authentication.

Option C incorrectly claims that tokens encrypt every packet at Layer 1. Tokens are not encryption mechanisms and do not operate at the physical layer. Encryption is handled by separate protocols such as TLS or IPsec.

Option D falsely asserts that tokens change HTTP from a stateless protocol to a routing protocol. HTTP remains stateless, and tokens enable session continuity without altering the protocol’s fundamental nature. Routing protocols are unrelated to token use.

DHCP (Dynamic Host Configuration Protocol) assigns IP addresses, subnet masks, default gateways, and other network configuration parameters to clients. It does not perform name resolution; DNS is required for that.

NTP (Network Time Protocol) is used to synchronize clocks between network devices, not to resolve hostnames to IP addresses. It operates on UDP port 123 and has no role in DNS resolution.

Syslog is a protocol for logging system messages and events from network devices. It has no function in name resolution; it is used for monitoring and troubleshooting.

A default gateway is needed only for management traffic from the switch itself, not for DNS forwarding; the switch already communicates with the router via its default route.

A static default route is already present and unrelated to DNS resolution; adding another route would not solve the name resolution failure.

The 'ip domain-lookup' command only enables the DNS client on the switch itself, not DNS forwarding for clients like PC1.

Assuming that a connection failure always starts at Layer 1 or 3, ignoring the specific error message that points to an application-layer mismatch.

Misplaced troubleshooting – attempting to relax security instead of fixing the server’s key size to meet the documented standard.

Drastic and insecure step that misdiagnoses the root cause; the issue is key size, not protocol version.

Incorrect because replacing SSH with Telnet reduces security by transmitting data unencrypted, exposing credentials and management traffic to interception, which violates best practices and the policy’s intent to secure management access.

Incorrect because enabling PortFast affects Spanning Tree Protocol port states to speed up network convergence and does not provide any control over router management access or SSH session initiation.

Incorrect because raising the syslog severity threshold only changes the level of logged messages and does not restrict or control which hosts can initiate SSH connections to the router.

The 'root primary' command does not guarantee root status if another switch has a priority lower than 24576. The question expects manual recovery, not automatic.

Priority 0 is not incorrect but is not the standard recommendation. The recovery method is wrong: disabling BPDU Guard does not clear the err-disabled state.

The command 'clear spanning-tree detected-protocols' does not clear the err-disabled state; it only resets the port's protocol state.

The trunk port Gi1/0/24 is in 'on' mode and trunking, as shown in 'show interfaces trunk'. Therefore, the trunk is operational and not the cause of the issue.

The 'show vlan brief' output shows that port Gi1/0/12 is assigned to VLAN 10, so the PC is in the correct VLAN. This is not the issue.

A duplicate IP address would cause connectivity issues to the gateway as well, but the PC can ping the gateway successfully. Therefore, duplicate IP is not the problem.

The modes 'desirable' and 'auto' are used by PAgP (Cisco proprietary), not LACP. LACP uses 'active' and 'passive' modes for negotiation.

The 'show etherchannel summary' command does not display 'UP' or 'DOWN' in plain text; it uses two-letter codes like SU (Layer 2 up), SD (shutdown), etc. This is a common misinterpretation of the output format.

LACP 'active' mode can form an EtherChannel with either 'active' or 'passive' mode. If both sides are passive, the channel will not form because neither initiates negotiation.

Option B is incorrect because the static route command does not enable OSPFv3. OSPFv3 requires separate configuration commands and is a dynamic routing protocol, unlike static routes.

Option C is incorrect because routing does not convert link-local addresses into global unicast addresses. Address types remain consistent, and routing forwards packets based on existing address formats.

Option D is incorrect because ::/0 is a default route covering all IPv6 addresses, not a summary route with a /64 prefix. Summarization involves aggregating multiple routes into a larger prefix, which is not the case here.

The route 10.50.0.0/16 is the least specific among the options because it covers a large range of IP addresses. Although it matches the destination IP 10.50.10.140, it is overridden by more specific routes with longer subnet masks, so it is not chosen.

The route 10.50.10.0/24 is more specific than the /16 but less specific than the /25. Since 10.50.10.140 falls within the /25 subnet, the router prefers the /25 route over this /24 route, making this option incorrect.

The default route is only used when no other matching routes exist. Since multiple specific routes match 10.50.10.140, the router will not use the default route, so this option is incorrect.

The routing table shows a static route to 10.10.20.0/24 via 10.10.10.2, so the route is present. The issue is not a missing route.

The interface is shown as directly connected with a local address, indicating it is up and operational. An administratively down interface would show 'administratively down' in the status.

The output shows 'Gateway of last resort is 10.10.10.2 to network 0.0.0.0', confirming the default route is configured.

The specific factual error is using 'switchport mode trunk' instead of 'switchport mode access'. Access ports are used for end devices like IP phones and APs, not trunks.

The specific factual error is using 'power inline never' which disables PoE. The correct command to enable PoE is 'power inline auto'.

The specific factual error is reversing the VLAN assignments: 'switchport access vlan 110' and 'switchport voice vlan 10' instead of the correct order.