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Cisco 300-410 Bundle

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 51

Question 500

At the Westlake utility network, spoke traffic to the Central grid operations center still traverses the hub even though the design requires direct dynamic spoke-to-spoke forwarding. After remediation, which observation would most directly demonstrate the intended result?

  1. The same tunnel interface can resolve and reach approved dynamic spoke peers.
  2. NHRP registration and resolution succeed in the intended cloud without joining a separate cloud.
  3. The routing protocol's hello traffic reaches the peer and its tunnel adjacency forms.
  4. NHRP shows the remote spoke's mapping and user traffic can traverse the direct tunnel.

Explanation

Correct Answer

D:

A meaningful acceptance check at the Westlake utility network should verify the actual forwarding or control-plane outcome. NHRP shows the remote spoke's mapping and user traffic can traverse the direct tunnel.

Incorrect Answers

A:

That test could pass while the specific fault remains. The same tunnel interface can resolve and reach approved dynamic spoke peers. It would not establish the required outcome for dmvpn spoke-to-spoke nhrp resolution at the Westlake utility network.

B:

The result addresses dmvpn nhrp network id mismatch, not the observed fault at the Westlake utility network. The decisive outcome is different: NHRP shows the remote spoke's mapping and user traffic can traverse the direct tunnel.

C:

This validates an unrelated control at the Westlake utility network: The routing protocol's hello traffic reaches the peer and its tunnel adjacency forms. It would not demonstrate correction of dmvpn spoke-to-spoke nhrp resolution.

Question 501

At the Bluewater clinical network, phase 2 DMVPN spokes learn remote LAN routes with the hub as next hop, forcing all spoke traffic through the hub. After remediation, which observation would most directly demonstrate the intended result?

  1. Remote branch routes retain the spoke next hop and direct NHRP resolution succeeds.
  2. NHRP shows the remote spoke's mapping and user traffic can traverse the direct tunnel.
  3. The spoke successfully registers at the hub and the accepted mappings reflect intended peers.
  4. The current hub responds to registrations and spoke resolution requests.

Explanation

Correct Answer

A:

This tests the exact behavior that was failing at the Bluewater clinical network. Remote branch routes retain the spoke next hop and direct NHRP resolution succeeds. The change supporting that outcome is: Preserve remote spoke tunnel next hops in routing advertisements when using phase 2 direct forwarding.

Incorrect Answers

B:

That test could pass while the specific fault remains. NHRP shows the remote spoke's mapping and user traffic can traverse the direct tunnel. It would not establish the required outcome for dmvpn phase 2 spoke next-hop preservation at the Bluewater clinical network.

C:

The result addresses dmvpn nhrp authentication mismatch, not the observed fault at the Bluewater clinical network. The decisive outcome is different: Remote branch routes retain the spoke next hop and direct NHRP resolution succeeds.

D:

This validates an unrelated control at the Bluewater clinical network: The current hub responds to registrations and spoke resolution requests. It would not demonstrate correction of dmvpn phase 2 spoke next-hop preservation.

Question 502

At the Cedarfield retail branch, phase 2 DMVPN spokes learn remote LAN routes with the hub as next hop, forcing all spoke traffic through the hub. After remediation, which observation would most directly demonstrate the intended result?

  1. The spoke successfully registers at the hub and the accepted mappings reflect intended peers.
  2. Subsequent eligible traffic uses a dynamically learned shortcut instead of remaining hub-transited.
  3. The hub NHRP cache shows the spoke's tunnel and public address mapping and the tunnel routing neighbor forms.
  4. Remote branch routes retain the spoke next hop and direct NHRP resolution succeeds.

Explanation

Correct Answer

D:

The stated result demonstrates that the specific condition at the Cedarfield retail branch has been corrected. Remote branch routes retain the spoke next hop and direct NHRP resolution succeeds.

Incorrect Answers

A:

The result addresses dmvpn nhrp authentication mismatch, not the observed fault at the Cedarfield retail branch. The decisive outcome is different: Remote branch routes retain the spoke next hop and direct NHRP resolution succeeds.

B:

This validates an unrelated control at the Cedarfield retail branch: Subsequent eligible traffic uses a dynamically learned shortcut instead of remaining hub-transited. It would not demonstrate correction of dmvpn phase 2 spoke next-hop preservation.

C:

That test could pass while the specific fault remains. The hub NHRP cache shows the spoke's tunnel and public address mapping and the tunnel routing neighbor forms. It would not establish the required outcome for dmvpn phase 2 spoke next-hop preservation at the Cedarfield retail branch.

Question 503

At the Ironwood training campus, a phase 3 DMVPN network has working hub-and-spoke connectivity but repeated branch traffic never discovers a shorter direct path. After remediation, which observation would most directly demonstrate the intended result?

  1. The spoke successfully registers at the hub and the accepted mappings reflect intended peers.
  2. Subsequent eligible traffic uses a dynamically learned shortcut instead of remaining hub-transited.
  3. The current hub responds to registrations and spoke resolution requests.
  4. The routing protocol's hello traffic reaches the peer and its tunnel adjacency forms.

Explanation

Correct Answer

B:

The stated result demonstrates that the specific condition at the Ironwood training campus has been corrected. Subsequent eligible traffic uses a dynamically learned shortcut instead of remaining hub-transited.

Incorrect Answers

A:

That test could pass while the specific fault remains. The spoke successfully registers at the hub and the accepted mappings reflect intended peers. It would not establish the required outcome for dmvpn phase 3 redirect and shortcut at the Ironwood training campus.

C:

This validates an unrelated control at the Ironwood training campus: The current hub responds to registrations and spoke resolution requests. It would not demonstrate correction of dmvpn phase 3 redirect and shortcut.

D:

That test could pass while the specific fault remains. The routing protocol's hello traffic reaches the peer and its tunnel adjacency forms. It would not establish the required outcome for dmvpn phase 3 redirect and shortcut at the Ironwood training campus.

Question 504

At the Harborview media campus, a phase 3 DMVPN network has working hub-and-spoke connectivity but repeated branch traffic never discovers a shorter direct path. After remediation, which observation would most directly demonstrate the intended result?

  1. The routing protocol's hello traffic reaches the peer and its tunnel adjacency forms.
  2. The current hub responds to registrations and spoke resolution requests.
  3. The hub NHRP cache shows the spoke's tunnel and public address mapping and the tunnel routing neighbor forms.
  4. Subsequent eligible traffic uses a dynamically learned shortcut instead of remaining hub-transited.

Explanation

Correct Answer

D:

This tests the exact behavior that was failing at the Harborview media campus. Subsequent eligible traffic uses a dynamically learned shortcut instead of remaining hub-transited. The change supporting that outcome is: Verify the hub's NHRP redirect behavior and spokes' shortcut processing for the phase 3 design.

Incorrect Answers

A:

This validates an unrelated control at the Harborview media campus: The routing protocol's hello traffic reaches the peer and its tunnel adjacency forms. It would not demonstrate correction of dmvpn phase 3 redirect and shortcut.

B:

That test could pass while the specific fault remains. The current hub responds to registrations and spoke resolution requests. It would not establish the required outcome for dmvpn phase 3 redirect and shortcut at the Harborview media campus.

C:

The result addresses dmvpn spoke registration to hub, not the observed fault at the Harborview media campus. The decisive outcome is different: Subsequent eligible traffic uses a dynamically learned shortcut instead of remaining hub-transited.

Question 505

At the Northport logistics site, the DMVPN underlay and NHRP mappings are healthy, but IPsec negotiation fails because peers offer no matching IKE security proposal. After remediation, which observation would most directly demonstrate the intended result?

  1. The routing protocol's hello traffic reaches the peer and its tunnel adjacency forms.
  2. The egress PE processes the remaining packet or service label correctly with no traffic loss.
  3. A labeled packet to the customer subnet exits through the correct VRF-associated interface.
  4. IKE negotiates an active security association and encrypted user traffic passes.

Explanation

Correct Answer

D:

The stated result demonstrates that the specific condition at the Northport logistics site has been corrected. IKE negotiates an active security association and encrypted user traffic passes.

Incorrect Answers

A:

The result addresses dmvpn multicast mapping for igp, not the observed fault at the Northport logistics site. The decisive outcome is different: IKE negotiates an active security association and encrypted user traffic passes.

B:

This validates an unrelated control at the Northport logistics site: The egress PE processes the remaining packet or service label correctly with no traffic loss. It would not demonstrate correction of ipsec ike proposal disagreement.

C:

That test could pass while the specific fault remains. A labeled packet to the customer subnet exits through the correct VRF-associated interface. It would not establish the required outcome for ipsec ike proposal disagreement at the Northport logistics site.

Question 506

At the Hillcrest research lab, the DMVPN underlay and NHRP mappings are healthy, but IPsec negotiation fails because peers offer no matching IKE security proposal. After remediation, which observation would most directly demonstrate the intended result?

  1. Overlapping prefixes remain distinct and only VPNs with matching RT policy import them.
  2. The routing protocol's hello traffic reaches the peer and its tunnel adjacency forms.
  3. IKE negotiates an active security association and encrypted user traffic passes.
  4. The current hub responds to registrations and spoke resolution requests.

Explanation

Correct Answer

C:

This tests the exact behavior that was failing at the Hillcrest research lab. IKE negotiates an active security association and encrypted user traffic passes. The change supporting that outcome is: Align the mutually supported IKE policy parameters for the approved VPN peers.

Incorrect Answers

A:

That test could pass while the specific fault remains. Overlapping prefixes remain distinct and only VPNs with matching RT policy import them. It would not establish the required outcome for ipsec ike proposal disagreement at the Hillcrest research lab.

B:

The result addresses dmvpn multicast mapping for igp, not the observed fault at the Hillcrest research lab. The decisive outcome is different: IKE negotiates an active security association and encrypted user traffic passes.

D:

That test could pass while the specific fault remains. The current hub responds to registrations and spoke resolution requests. It would not establish the required outcome for ipsec ike proposal disagreement at the Hillcrest research lab.

Question 507

At the Granite manufacturing plant, IKE authentication completes but the DMVPN data security association cannot establish after one device changes its IPsec proposal. After remediation, which observation would most directly demonstrate the intended result?

  1. IPsec SAs establish with the approved transform and protected tunnel traffic increments counters.
  2. The CE installs the permitted remote subnet with the correct next hop and VRF isolation.
  3. Subsequent eligible traffic uses a dynamically learned shortcut instead of remaining hub-transited.
  4. The intended VPN prefix is imported into the correct VRF and not into unrelated VRFs.

Explanation

Correct Answer

A:

This tests the exact behavior that was failing at the Granite manufacturing plant. IPsec SAs establish with the approved transform and protected tunnel traffic increments counters. The change supporting that outcome is: Align the tunnel protection profile and supported IPsec transform parameters at both peers.

Incorrect Answers

B:

That test could pass while the specific fault remains. The CE installs the permitted remote subnet with the correct next hop and VRF isolation. It would not establish the required outcome for ipsec profile transform mismatch at the Granite manufacturing plant.

C:

The result addresses dmvpn phase 3 redirect and shortcut, not the observed fault at the Granite manufacturing plant. The decisive outcome is different: IPsec SAs establish with the approved transform and protected tunnel traffic increments counters.

D:

This validates an unrelated control at the Granite manufacturing plant: The intended VPN prefix is imported into the correct VRF and not into unrelated VRFs. It would not demonstrate correction of ipsec profile transform mismatch.

Question 508

At the Elmfield engineering office, IKE authentication completes but the DMVPN data security association cannot establish after one device changes its IPsec proposal. After remediation, which observation would most directly demonstrate the intended result?

  1. The routing protocol's hello traffic reaches the peer and its tunnel adjacency forms.
  2. IPsec SAs establish with the approved transform and protected tunnel traffic increments counters.
  3. The hub NHRP cache shows the spoke's tunnel and public address mapping and the tunnel routing neighbor forms.
  4. NHRP shows the remote spoke's mapping and user traffic can traverse the direct tunnel.

Explanation

Correct Answer

B:

This tests the exact behavior that was failing at the Elmfield engineering office. IPsec SAs establish with the approved transform and protected tunnel traffic increments counters. The change supporting that outcome is: Align the tunnel protection profile and supported IPsec transform parameters at both peers.

Incorrect Answers

A:

The result addresses dmvpn multicast mapping for igp, not the observed fault at the Elmfield engineering office. The decisive outcome is different: IPsec SAs establish with the approved transform and protected tunnel traffic increments counters.

C:

That test could pass while the specific fault remains. The hub NHRP cache shows the spoke's tunnel and public address mapping and the tunnel routing neighbor forms. It would not establish the required outcome for ipsec profile transform mismatch at the Elmfield engineering office.

D:

The result addresses dmvpn spoke-to-spoke nhrp resolution, not the observed fault at the Elmfield engineering office. The decisive outcome is different: IPsec SAs establish with the approved transform and protected tunnel traffic increments counters.

Question 509

At the Oakbridge insurance office, short management packets pass through the DMVPN, but larger TCP sessions repeatedly stall after encapsulation. After remediation, which observation would most directly demonstrate the intended result?

  1. The spoke successfully registers at the hub and the accepted mappings reflect intended peers.
  2. The egress PE processes the remaining packet or service label correctly with no traffic loss.
  3. Large application transfers complete without persistent fragmentation or TCP MSS black holes.
  4. The intended VPN prefix is imported into the correct VRF and not into unrelated VRFs.

Explanation

Correct Answer

C:

This tests the exact behavior that was failing at the Oakbridge insurance office. Large application transfers complete without persistent fragmentation or TCP MSS black holes. The change supporting that outcome is: Set appropriate tunnel MTU and TCP MSS handling based on GRE/IPsec overhead and verified PMTUD behavior.

Incorrect Answers

A:

That test could pass while the specific fault remains. The spoke successfully registers at the hub and the accepted mappings reflect intended peers. It would not establish the required outcome for gre over ipsec mtu and mss at the Oakbridge insurance office.

B:

The result addresses mpls penultimate-hop popping, not the observed fault at the Oakbridge insurance office. The decisive outcome is different: Large application transfers complete without persistent fragmentation or TCP MSS black holes.

D:

That test could pass while the specific fault remains. The intended VPN prefix is imported into the correct VRF and not into unrelated VRFs. It would not establish the required outcome for gre over ipsec mtu and mss at the Oakbridge insurance office.

Question 510

At the Aspen agricultural office, short management packets pass through the DMVPN, but larger TCP sessions repeatedly stall after encapsulation. After remediation, which observation would most directly demonstrate the intended result?

  1. LDP neighbors reach operational state and usable label bindings are visible for the core FECs.
  2. Large application transfers complete without persistent fragmentation or TCP MSS black holes.
  3. The spoke successfully registers at the hub and the accepted mappings reflect intended peers.
  4. The hub NHRP cache shows the spoke's tunnel and public address mapping and the tunnel routing neighbor forms.

Explanation

Correct Answer

B:

A meaningful acceptance check at the Aspen agricultural office should verify the actual forwarding or control-plane outcome. Large application transfers complete without persistent fragmentation or TCP MSS black holes.

Incorrect Answers

A:

This validates an unrelated control at the Aspen agricultural office: LDP neighbors reach operational state and usable label bindings are visible for the core FECs. It would not demonstrate correction of gre over ipsec mtu and mss.

C:

The result addresses dmvpn nhrp authentication mismatch, not the observed fault at the Aspen agricultural office. The decisive outcome is different: Large application transfers complete without persistent fragmentation or TCP MSS black holes.

D:

This validates an unrelated control at the Aspen agricultural office: The hub NHRP cache shows the spoke's tunnel and public address mapping and the tunnel routing neighbor forms. It would not demonstrate correction of gre over ipsec mtu and mss.