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Exam Code: 300-410

Exam Name Implementing Cisco Enterprise Advanced Routing and Services (ENARSI)

Certification Provider: Cisco

Corresponding Certification: CCNP Enterprise

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Cisco 300-410 Practice Test 67

Question 660

At a public utility network in Calgary, a post-change check targets this documented issue: The collector receives NetFlow v9 data records but cannot decode fields because the template has not been received. Which observation is the strongest evidence that the repair worked?

  1. Decoded flow records display the expected fields after the template is learned
  2. Inbound flow counters increase for captured test traffic
  3. The collector receives manageable sampled flow records and reports sampling metadata accurately
  4. The collector receives the expected exported flow records from the router

Explanation

Correct Answer

A:

This is the observable outcome for netflow v9 template information. It tests whether the targeted change, 'Ensure the exporter sends the corresponding NetFlow v9 templates and collector receives them', actually resolved the reported issue at a public utility network in Calgary. The original failure was: The collector receives NetFlow v9 data records but cannot decode fields because the template has not been received.

Incorrect Answers

B:

That observation verifies flow monitor interface direction in a different situation, such as when netFlow statistics are empty for inbound traffic because the flow monitor was applied only in the outbound direction. For the reported netflow v9 template information incident at a public utility network in Calgary, the required acceptance evidence is: Decoded flow records display the expected fields after the template is learned. This other result does not test that condition directly.

C:

That observation verifies high-rate sampled flow visibility in a different situation, such as when a high-speed interface exports excessive flow volume and overwhelms the collector, while an engineer proposes dropping all flow monitoring. For the reported netflow v9 template information incident at a public utility network in Calgary, the required acceptance evidence is: Decoded flow records display the expected fields after the template is learned. This other result does not test that condition directly.

D:

That observation verifies flexible netflow exporter target in a different situation, such as when a flow monitor collects records locally but the collector receives nothing because its exporter destination is wrong. For the reported netflow v9 template information incident at a public utility network in Calgary, the required acceptance evidence is: Decoded flow records display the expected fields after the template is learned. This other result does not test that condition directly.

Question 661

At a government campus in Canberra, engineers investigating router control-plane protection report: A platform shows low software CoPP counters and the team concludes no packets were dropped despite hardware policing. Which configuration or diagnostic response best addresses this exact fault?

  1. Apply CoPP to packets destined for the router control plane and use separate data-plane QoS for transit flows
  2. Separate authorized SSH management traffic into an appropriate CoPP class and set usable rates
  3. Inspect platform-appropriate hardware as well as software CoPP counters
  4. Apply a controlled CoPP policy to classify and police router-destined management traffic

Explanation

Correct Answer

C:

This action directly corrects copp hardware offload visibility. The observed fault is: A platform shows low software CoPP counters and the team concludes no packets were dropped despite hardware policing. The specified remedy addresses that mechanism rather than a nearby networking feature. Confirmation requires: Observed drop rates account for hardware-enforced policy decisions. The conclusion applies to the stated Cisco IOS/IOS XE scenario at a government campus in Canberra; syntax and capabilities remain platform dependent.

Incorrect Answers

A:

That approach is relevant to copp to-router versus transit, such as when a control-plane policy is expected to rate-limit transit traffic between two hosts but does not affect that flow. That is a different root cause from the copp hardware offload visibility fault observed at a government campus in Canberra. Applying that approach alone would not establish the required result: Observed drop rates account for hardware-enforced policy decisions.

B:

That approach is relevant to copp ssh throttling, such as when remote SSH login attempts time out because the management class policer is too low for legitimate maintenance bursts. That is a different root cause from the copp hardware offload visibility fault observed at a government campus in Canberra. Applying that approach alone would not establish the required result: Observed drop rates account for hardware-enforced policy decisions.

D:

That approach is relevant to copp protection against cpu attack, such as when high-rate packets addressed to router management services exhaust CPU while transit interfaces remain uncongested. That is a different root cause from the copp hardware offload visibility fault observed at a government campus in Canberra. Applying that approach alone would not establish the required result: Observed drop rates account for hardware-enforced policy decisions.

Question 662

At a government campus in Canberra, a post-change check targets this documented issue: A platform shows low software CoPP counters and the team concludes no packets were dropped despite hardware policing. Which observation is the strongest evidence that the repair worked?

  1. Observed drop rates account for hardware-enforced policy decisions
  2. BGP neighbor sessions remain stable and CoPP drop counters for that class decline
  3. OSPF hellos reach the process and adjacencies remain stable under expected load
  4. Authorized SNMP polls succeed and exceeded-drop counts remain within accepted thresholds

Explanation

Correct Answer

A:

This is the observable outcome for copp hardware offload visibility. It tests whether the targeted change, 'Inspect platform-appropriate hardware as well as software CoPP counters', actually resolved the reported issue at a government campus in Canberra. The original failure was: A platform shows low software CoPP counters and the team concludes no packets were dropped despite hardware policing.

Incorrect Answers

B:

That observation verifies copp bgp keepalive drop in a different situation, such as when an overly strict CoPP policer drops BGP keepalives and neighbors repeatedly expire their hold timers. For the reported copp hardware offload visibility incident at a government campus in Canberra, the required acceptance evidence is: Observed drop rates account for hardware-enforced policy decisions. This other result does not test that condition directly.

C:

That observation verifies copp ospf hello starvation in a different situation, such as when oSPF adjacencies flap only during bursts because CoPP control-plane policing drops routed protocol hellos. For the reported copp hardware offload visibility incident at a government campus in Canberra, the required acceptance evidence is: Observed drop rates account for hardware-enforced policy decisions. This other result does not test that condition directly.

D:

That observation verifies copp snmp polling impact in a different situation, such as when the monitoring station sees SNMP timeouts during busy periods while CoPP exceeded counters increase for the polling class. For the reported copp hardware offload visibility incident at a government campus in Canberra, the required acceptance evidence is: Observed drop rates account for hardware-enforced policy decisions. This other result does not test that condition directly.

Question 663

At an energy services network in Calgary, engineers investigating remote site encrypted transport report: An IGP core forwards ordinary IP packets but labeled traffic fails because MPLS forwarding is absent on a core-facing interface. Which configuration or diagnostic response best addresses this exact fault?

  1. Enable MPLS on the supported core link and verify its label-forwarding state
  2. Interpret the outer label as transit transport forwarding and the inner label as VPN/service disposition at the egress PE
  3. Cross-check IGP next-hop selection with received LDP label mappings for that forwarding equivalence class
  4. Check MPLS TTL propagation configuration and platform forwarding behavior before treating visibility as reachability failure

Explanation

Correct Answer

A:

This action directly corrects mpls interface activation. The observed fault is: An IGP core forwards ordinary IP packets but labeled traffic fails because MPLS forwarding is absent on a core-facing interface. The specified remedy addresses that mechanism rather than a nearby networking feature. Confirmation requires: The interface participates in MPLS and LFIB entries are usable across the path. The conclusion applies to the stated Cisco IOS/IOS XE scenario at an energy services network in Calgary; syntax and capabilities remain platform dependent.

Incorrect Answers

B:

That approach is relevant to label stack for vpn, such as when an MPLS VPN packet arrives with an outer transport label and inner service label; an operator interprets both labels as unrelated IP headers. That is a different root cause from the mpls interface activation fault observed at an energy services network in Calgary. Applying that approach alone would not establish the required result: The interface participates in MPLS and LFIB entries are usable across the path.

C:

That approach is relevant to mpls ldp binding mismatch, such as when the IGP has a route but the LDP forwarding entry for the corresponding FEC points toward a different unexpected next hop. That is a different root cause from the mpls interface activation fault observed at an energy services network in Calgary. Applying that approach alone would not establish the required result: The interface participates in MPLS and LFIB entries are usable across the path.

D:

That approach is relevant to mpls ttl handling, such as when an MPLS traceroute behaves differently from IP traceroute and the team assumes label switching is broken because hop visibility differs. That is a different root cause from the mpls interface activation fault observed at an energy services network in Calgary. Applying that approach alone would not establish the required result: The interface participates in MPLS and LFIB entries are usable across the path.

Question 664

At an energy services network in Calgary, a post-change check targets this documented issue: An IGP core forwards ordinary IP packets but labeled traffic fails because MPLS forwarding is absent on a core-facing interface. Which observation is the strongest evidence that the repair worked?

  1. A valid remote label and next hop populate the MPLS forwarding table for that FEC
  2. A labeled packet is switched using LFIB entries to the correct next hop without a full IP lookup at every transit hop
  3. The interface participates in MPLS and LFIB entries are usable across the path
  4. LFIB next hop and outgoing label align with the valid underlying IGP path

Explanation

Correct Answer

C:

This is the observable outcome for mpls interface activation. It tests whether the targeted change, 'Enable MPLS on the supported core link and verify its label-forwarding state', actually resolved the reported issue at an energy services network in Calgary. The original failure was: An IGP core forwards ordinary IP packets but labeled traffic fails because MPLS forwarding is absent on a core-facing interface.

Incorrect Answers

A:

That observation verifies provider core label loss in a different situation, such as when core IGP routes are stable but the ingress PE has no remote label for the required egress PE FEC. For the reported mpls interface activation incident at an energy services network in Calgary, the required acceptance evidence is: The interface participates in MPLS and LFIB entries are usable across the path. This other result does not test that condition directly.

B:

That observation verifies mpls label swapping in a different situation, such as when a core operator assumes each transit router forwards solely on the customer destination IP rather than the incoming MPLS label. For the reported mpls interface activation incident at an energy services network in Calgary, the required acceptance evidence is: The interface participates in MPLS and LFIB entries are usable across the path. This other result does not test that condition directly.

D:

That observation verifies mpls ldp binding mismatch in a different situation, such as when the IGP has a route but the LDP forwarding entry for the corresponding FEC points toward a different unexpected next hop. For the reported mpls interface activation incident at an energy services network in Calgary, the required acceptance evidence is: The interface participates in MPLS and LFIB entries are usable across the path. This other result does not test that condition directly.

Question 665

At a logistics WAN in Rotterdam, engineers investigating depot reachability report: A host matches an OSPF /24 and a lower-AD static /16; operations assumes the static summary must forward the packet. Which configuration or diagnostic response best addresses this exact fault?

  1. Apply longest-prefix matching first; the more-specific /24 forwards its matching traffic regardless of the /16 AD
  2. Apply ip policy route-map on the ingress Layer 3 interface carrying matching transit packets
  3. Compare the administrative distances first; by default internal EIGRP AD 90 outranks OSPF AD 110 for the same prefix
  4. Apply the appropriate prefix filter or route-map to the intended neighbor and inbound direction

Explanation

Correct Answer

A:

This action directly corrects longest prefix before ad. The observed fault is: A host matches an OSPF /24 and a lower-AD static /16; operations assumes the static summary must forward the packet. The specified remedy addresses that mechanism rather than a nearby networking feature. Confirmation requires: A route lookup for an address inside the /24 selects its next hop, while other /16 addresses follow the summary. The conclusion applies to the stated Cisco IOS/IOS XE scenario at a logistics WAN in Rotterdam; syntax and capabilities remain platform dependent.

Incorrect Answers

B:

That approach is relevant to pbr on wrong interface, such as when a policy-based route-map is created but traffic entering the branch router continues to follow destination RIB lookup. That is a different root cause from the longest prefix before ad fault observed at a logistics WAN in Rotterdam. Applying that approach alone would not establish the required result: A route lookup for an address inside the /24 selects its next hop, while other /16 addresses follow the summary.

C:

That approach is relevant to same-prefix administrative distance, such as when an internal EIGRP route and an OSPF route advertise the identical IPv4 prefix, but the engineer expects OSPF to win solely because its interface cost is lower. That is a different root cause from the longest prefix before ad fault observed at a logistics WAN in Rotterdam. Applying that approach alone would not establish the required result: A route lookup for an address inside the /24 selects its next hop, while other /16 addresses follow the summary.

D:

That approach is relevant to route-map attachment direction, such as when a prefix policy meant to constrain inbound BGP routes is applied only outbound to the peer. That is a different root cause from the longest prefix before ad fault observed at a logistics WAN in Rotterdam. Applying that approach alone would not establish the required result: A route lookup for an address inside the /24 selects its next hop, while other /16 addresses follow the summary.

Question 666

At a logistics WAN in Rotterdam, a post-change check targets this documented issue: A host matches an OSPF /24 and a lower-AD static /16; operations assumes the static summary must forward the packet. Which observation is the strongest evidence that the repair worked?

  1. Only the documented flow subset uses the alternate next hop and nonmatching traffic stays on RIB lookup
  2. A route lookup for an address inside the /24 selects its next hop, while other /16 addresses follow the summary
  3. The specific route receives its specialized action while other accepted routes match the fallback
  4. Matching inbound traffic follows the policy next hop while unmatched traffic continues normal routing

Explanation

Correct Answer

B:

This is the observable outcome for longest prefix before ad. It tests whether the targeted change, 'Apply longest-prefix matching first; the more-specific /24 forwards its matching traffic regardless of the /16 AD', actually resolved the reported issue at a logistics WAN in Rotterdam. The original failure was: A host matches an OSPF /24 and a lower-AD static /16; operations assumes the static summary must forward the packet.

Incorrect Answers

A:

That observation verifies pbr set next-hop and packet selection in a different situation, such as when a route-map modifies packets from an unintended subnet because its ACL permits every source. For the reported longest prefix before ad incident at a logistics WAN in Rotterdam, the required acceptance evidence is: A route lookup for an address inside the /24 selects its next hop, while other /16 addresses follow the summary. This other result does not test that condition directly.

C:

That observation verifies route-map sequence numbering in a different situation, such as when a new permit route-map entry is added after a broad permit any; its more-specific set action never runs. For the reported longest prefix before ad incident at a logistics WAN in Rotterdam, the required acceptance evidence is: A route lookup for an address inside the /24 selects its next hop, while other /16 addresses follow the summary. This other result does not test that condition directly.

D:

That observation verifies pbr on wrong interface in a different situation, such as when a policy-based route-map is created but traffic entering the branch router continues to follow destination RIB lookup. For the reported longest prefix before ad incident at a logistics WAN in Rotterdam, the required acceptance evidence is: A route lookup for an address inside the /24 selects its next hop, while other /16 addresses follow the summary. This other result does not test that condition directly.

Question 667

At a medical campus infrastructure team in Raleigh, engineers investigating core service availability report: An operator tries to securely copy router files using SCP but the device is configured only for unencrypted TFTP. Which configuration or diagnostic response best addresses this exact fault?

  1. Use a validated console or out-of-band recovery channel with protected authentication
  2. Inspect TFTP transfer direction and dynamic UDP ports or use a permitted secure alternative
  3. Limit the VTY transport input to SSH and maintain the approved authentication policy
  4. Enable supported SCP server/client functionality and appropriate SSH authentication for file transfer

Explanation

Correct Answer

D:

This action directly corrects scp file transfer enablement. The observed fault is: An operator tries to securely copy router files using SCP but the device is configured only for unencrypted TFTP. The specified remedy addresses that mechanism rather than a nearby networking feature. Confirmation requires: An authorized SCP transfer completes with the encrypted session and verified file checksum. The conclusion applies to the stated Cisco IOS/IOS XE scenario at a medical campus infrastructure team in Raleigh; syntax and capabilities remain platform dependent.

Incorrect Answers

A:

That approach is relevant to console versus vty recovery, such as when wAN routing is down and engineers try to troubleshoot using remote VTY login without a console or out-of-band plan. That is a different root cause from the scp file transfer enablement fault observed at a medical campus infrastructure team in Raleigh. Applying that approach alone would not establish the required result: An authorized SCP transfer completes with the encrypted session and verified file checksum.

B:

That approach is relevant to tftp transfer firewall, such as when a device can ping its image server but TFTP copy fails because an intermediate ACL blocks the required UDP TFTP exchange. That is a different root cause from the scp file transfer enablement fault observed at a medical campus infrastructure team in Raleigh. Applying that approach alone would not establish the required result: An authorized SCP transfer completes with the encrypted session and verified file checksum.

C:

That approach is relevant to ssh transport restriction, such as when a VTY line allows Telnet login even though the management policy requires encrypted CLI access. That is a different root cause from the scp file transfer enablement fault observed at a medical campus infrastructure team in Raleigh. Applying that approach alone would not establish the required result: An authorized SCP transfer completes with the encrypted session and verified file checksum.

Question 668

At a medical campus infrastructure team in Raleigh, a post-change check targets this documented issue: An operator tries to securely copy router files using SCP but the device is configured only for unencrypted TFTP. Which observation is the strongest evidence that the repair worked?

  1. An authorized local account authenticates through SSH with the correct privilege and access controls
  2. Bidirectional SSH session packets follow the intended management VRF and logins succeed
  3. Web management uses TLS and ordinary HTTP is unavailable or redirected according to approved policy
  4. An authorized SCP transfer completes with the encrypted session and verified file checksum

Explanation

Correct Answer

D:

This is the observable outcome for scp file transfer enablement. It tests whether the targeted change, 'Enable supported SCP server/client functionality and appropriate SSH authentication for file transfer', actually resolved the reported issue at a medical campus infrastructure team in Raleigh. The original failure was: An operator tries to securely copy router files using SCP but the device is configured only for unencrypted TFTP.

Incorrect Answers

A:

That observation verifies vty login local in a different situation, such as when local user accounts exist but remote SSH sessions fail at password prompts because the VTY line uses incompatible login settings. For the reported scp file transfer enablement incident at a medical campus infrastructure team in Raleigh, the required acceptance evidence is: An authorized SCP transfer completes with the encrypted session and verified file checksum. This other result does not test that condition directly.

B:

That observation verifies ssh source interface routing in a different situation, such as when management SSH works from one site but not another because replies leave through an unintended VRF or source path. For the reported scp file transfer enablement incident at a medical campus infrastructure team in Raleigh, the required acceptance evidence is: An authorized SCP transfer completes with the encrypted session and verified file checksum. This other result does not test that condition directly.

C:

That observation verifies https management instead of http in a different situation, such as when router web-management credentials traverse an unencrypted HTTP service despite a secure management requirement. For the reported scp file transfer enablement incident at a medical campus infrastructure team in Raleigh, the required acceptance evidence is: An authorized SCP transfer completes with the encrypted session and verified file checksum. This other result does not test that condition directly.

Question 669

An ENARSI troubleshooting review at a manufacturing group in Copenhagen finds the following symptom in factory overlay tunnels: Spoke-to-hub GRE packets are being sent without the required encryption because no tunnel protection profile is attached. What is the BEST targeted correction?

  1. Configure the hub tunnel for appropriate multipoint GRE and NHRP registration
  2. Apply the intended IPsec profile to the appropriate DMVPN tunnel and verify negotiated SAs
  3. Apply a supported tunnel front-door VRF lookup appropriate to the WAN underlay design
  4. Use show dmvpn with tunnel and NHRP diagnostics to inspect actual peer state

Explanation

Correct Answer

B:

This action directly corrects tunnel ipsec profile binding. The observed fault is: Spoke-to-hub GRE packets are being sent without the required encryption because no tunnel protection profile is attached. The specified remedy addresses that mechanism rather than a nearby networking feature. Confirmation requires: GRE transport is protected by the expected IPsec associations and encrypted packet counters increase. The conclusion applies to the stated Cisco IOS/IOS XE scenario at a manufacturing group in Copenhagen; syntax and capabilities remain platform dependent.

Incorrect Answers

A:

That approach is relevant to dmvpn mgre hub, such as when a single-hub DMVPN must support many dynamically registered spokes, but the hub tunnel is configured as a fixed point-to-point GRE tunnel. That is a different root cause from the tunnel ipsec profile binding fault observed at a manufacturing group in Copenhagen. Applying that approach alone would not establish the required result: GRE transport is protected by the expected IPsec associations and encrypted packet counters increase.

C:

That approach is relevant to dmvpn front-door vrf, such as when the tunnel's physical WAN interface belongs to a transport VRF but tunnel underlay lookups incorrectly use the global table. That is a different root cause from the tunnel ipsec profile binding fault observed at a manufacturing group in Copenhagen. Applying that approach alone would not establish the required result: GRE transport is protected by the expected IPsec associations and encrypted packet counters increase.

D:

That approach is relevant to dmvpn peer-state cli, such as when tunnel interfaces show up/up but the team has not checked whether NHRP peers are registered and active. That is a different root cause from the tunnel ipsec profile binding fault observed at a manufacturing group in Copenhagen. Applying that approach alone would not establish the required result: GRE transport is protected by the expected IPsec associations and encrypted packet counters increase.

Question 670

For factory overlay tunnels at a manufacturing group in Copenhagen, a maintenance test revisits the fault: Spoke-to-hub GRE packets are being sent without the required encryption because no tunnel protection profile is attached. Which result validates the intended fix most directly?

  1. Both encryption and decryption counters increase during bidirectional protected testing
  2. IPsec negotiation and protected payload counters operate without exposing unrelated services
  3. GRE transport is protected by the expected IPsec associations and encrypted packet counters increase
  4. The spoke behind NAT establishes IPsec and bidirectional encrypted traffic flows

Explanation

Correct Answer

C:

This is the observable outcome for tunnel ipsec profile binding. It tests whether the targeted change, 'Apply the intended IPsec profile to the appropriate DMVPN tunnel and verify negotiated SAs', actually resolved the reported issue at a manufacturing group in Copenhagen. The original failure was: Spoke-to-hub GRE packets are being sent without the required encryption because no tunnel protection profile is attached.

Incorrect Answers

A:

That observation verifies ipsec outbound-only counters in a different situation, such as when the local spoke increments IPsec encapsulation counters but receives no decapsulated packets from the hub. For the reported tunnel ipsec profile binding incident at a manufacturing group in Copenhagen, the required acceptance evidence is: GRE transport is protected by the expected IPsec associations and encrypted packet counters increase. This other result does not test that condition directly.

B:

That observation verifies ike esp underlay filtering in a different situation, such as when a DMVPN peer can ping its hub's public interface but IKE or ESP packets are blocked by a WAN ACL. For the reported tunnel ipsec profile binding incident at a manufacturing group in Copenhagen, the required acceptance evidence is: GRE transport is protected by the expected IPsec associations and encrypted packet counters increase. This other result does not test that condition directly.

D:

That observation verifies nat-t reachability in a different situation, such as when a DMVPN spoke behind NAT cannot establish IPsec because the path filters NAT traversal traffic. For the reported tunnel ipsec profile binding incident at a manufacturing group in Copenhagen, the required acceptance evidence is: GRE transport is protected by the expected IPsec associations and encrypted packet counters increase. This other result does not test that condition directly.