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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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Implementing Cisco Enterprise Advanced Routing and Services (ENARSI) (300-410) Practice Tests

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Cisco 300-410 Practice Test 25

Question 240

At the Northport logistics site, an alternate EIGRP route is feasible but has a higher metric and is not installed alongside the primary path as desired. Which underlying technical condition best accounts for this evidence?

  1. The alternate path fails the strict EIGRP feasibility condition because 130 is not below 100.
  2. The leaf is participating in a query domain larger than its topology role requires.
  3. Default EIGRP forwarding does not use the desired unequal-cost feasible alternate without appropriate variance.
  4. Passive-interface suppresses routing-neighbor discovery where an EIGRP adjacency is required.

Explanation

Correct Answer

C:

The evidence at the Northport logistics site supports this condition: Default EIGRP forwarding does not use the desired unequal-cost feasible alternate without appropriate variance. The associated fix is: Configure EIGRP variance within the feasible-path and feasible-distance limitations for unequal-cost load balancing.

Incorrect Answers

A:

This diagnoses a different mechanism: The alternate path fails the strict EIGRP feasibility condition because 130 is not below 100. The reported symptom at the Northport logistics site instead concerns eigrp variance traffic sharing.

B:

That diagnosis belongs to eigrp query scope using stub, while the observation at the Northport logistics site points to eigrp variance traffic sharing.

D:

This diagnoses a different mechanism: Passive-interface suppresses routing-neighbor discovery where an EIGRP adjacency is required. The reported symptom at the Northport logistics site instead concerns eigrp variance traffic sharing.

Question 241

At the Elmfield engineering office, engineers change a link's configured delay and the EIGRP best path to the Midtown engineering center shifts despite unchanged line bandwidth. Which underlying technical condition best accounts for this evidence?

  1. The EIGRP route metric reflects interface delay as well as bandwidth under standard metric settings.
  2. The leaf is participating in a query domain larger than its topology role requires.
  3. EIGRP peers in different AS configurations will not establish the intended neighbor relationship.
  4. The adjacency rejects peer packets because their authentication settings do not agree.

Explanation

Correct Answer

A:

The evidence at the Elmfield engineering office supports this condition: The EIGRP route metric reflects interface delay as well as bandwidth under standard metric settings. The associated fix is: Assess the interface delay contribution to the EIGRP composite metric and set it deliberately.

Incorrect Answers

B:

This diagnoses a different mechanism: The leaf is participating in a query domain larger than its topology role requires. The reported symptom at the Elmfield engineering office instead concerns eigrp delay in composite metric.

C:

That diagnosis belongs to eigrp as mismatch, while the observation at the Elmfield engineering office points to eigrp delay in composite metric.

D:

The observation at the Elmfield engineering office does not point to eigrp authentication mismatch; it points to a different condition. The EIGRP route metric reflects interface delay as well as bandwidth under standard metric settings.

Question 242

At the Granite manufacturing plant, engineers change a link's configured delay and the EIGRP best path to the Meridian corporate campus shifts despite unchanged line bandwidth. Which underlying technical condition best accounts for this evidence?

  1. The alternate path fails the strict EIGRP feasibility condition because 130 is not below 100.
  2. The adjacency rejects peer packets because their authentication settings do not agree.
  3. Default EIGRP forwarding does not use the desired unequal-cost feasible alternate without appropriate variance.
  4. The EIGRP route metric reflects interface delay as well as bandwidth under standard metric settings.

Explanation

Correct Answer

D:

This diagnosis fits the symptoms at the Granite manufacturing plant. The EIGRP route metric reflects interface delay as well as bandwidth under standard metric settings. The remedial action is: Assess the interface delay contribution to the EIGRP composite metric and set it deliberately.

Incorrect Answers

A:

That diagnosis belongs to eigrp feasible successor inequality, while the observation at the Granite manufacturing plant points to eigrp delay in composite metric.

B:

The observation at the Granite manufacturing plant does not point to eigrp authentication mismatch; it points to a different condition. The EIGRP route metric reflects interface delay as well as bandwidth under standard metric settings.

C:

This diagnoses a different mechanism: Default EIGRP forwarding does not use the desired unequal-cost feasible alternate without appropriate variance. The reported symptom at the Granite manufacturing plant instead concerns eigrp delay in composite metric.

Question 243

At the Aspen agricultural office, R-ASP-WAN1 and R-VAL-WAN2 share a working IPv4 subnet, yet OSPF adjacency fails; one interface is area 0 and the other area 10. Which underlying technical condition best accounts for this evidence?

  1. OSPF neighbor packets describe incompatible area membership for a common link.
  2. Authentication settings on the OSPF peers no longer match, so received protocol packets are rejected.
  3. NSSA external routes use type-7 LSAs internally and depend on translation for normal areas.
  4. Different OSPF network-type expectations lead to inconsistent adjacency and DR behavior.

Explanation

Correct Answer

A:

OSPF neighbor packets describe incompatible area membership for a common link. That explains the specific symptom at the Aspen agricultural office. A direct corrective action is: Configure the two ends of the intended OSPF adjacency in the same area.

Incorrect Answers

B:

That diagnosis belongs to ospf authentication mismatch, while the observation at the Aspen agricultural office points to ospf area mismatch.

C:

The observation at the Aspen agricultural office does not point to ospf nssa external routes; it points to a different condition. OSPF neighbor packets describe incompatible area membership for a common link.

D:

This diagnoses a different mechanism: Different OSPF network-type expectations lead to inconsistent adjacency and DR behavior. The reported symptom at the Aspen agricultural office instead concerns ospf area mismatch.

Question 244

At the Oakbridge insurance office, R-OAK-EDGE1 and R-MOU-EDGE2 share a working IPv4 subnet, yet OSPF adjacency fails; one interface is area 0 and the other area 10. Which underlying technical condition best accounts for this evidence?

  1. Different OSPF network-type expectations lead to inconsistent adjacency and DR behavior.
  2. A virtual link cannot use a stub area as its transit area to repair backbone connectivity.
  3. OSPF neighbor packets describe incompatible area membership for a common link.
  4. NSSA external routes use type-7 LSAs internally and depend on translation for normal areas.

Explanation

Correct Answer

C:

This diagnosis fits the symptoms at the Oakbridge insurance office. OSPF neighbor packets describe incompatible area membership for a common link. The remedial action is: Configure the two ends of the intended OSPF adjacency in the same area.

Incorrect Answers

A:

The observation at the Oakbridge insurance office does not point to ospf dr network-type mismatch; it points to a different condition. OSPF neighbor packets describe incompatible area membership for a common link.

B:

This diagnoses a different mechanism: A virtual link cannot use a stub area as its transit area to repair backbone connectivity. The reported symptom at the Oakbridge insurance office instead concerns ospf area mismatch.

D:

The observation at the Oakbridge insurance office does not point to ospf nssa external routes; it points to a different condition. OSPF neighbor packets describe incompatible area membership for a common link.

Question 245

At the Redwood medical campus, OSPF neighbors on the transit link repeatedly fail to reach Full state after one router's authentication key was rotated. Which underlying technical condition best accounts for this evidence?

  1. Incompatible interface MTU values can prevent successful OSPF database-description exchange.
  2. The OSPF Hello options differ because one router does not agree that the area is a stub.
  3. NSSA external routes use type-7 LSAs internally and depend on translation for normal areas.
  4. Authentication settings on the OSPF peers no longer match, so received protocol packets are rejected.

Explanation

Correct Answer

D:

This diagnosis fits the symptoms at the Redwood medical campus. Authentication settings on the OSPF peers no longer match, so received protocol packets are rejected. The remedial action is: Align OSPF authentication type, algorithm and matching credentials across the shared link.

Incorrect Answers

A:

That diagnosis belongs to ospf mtu exstart, while the observation at the Redwood medical campus points to ospf authentication mismatch.

B:

The observation at the Redwood medical campus does not point to ospf stub area options mismatch; it points to a different condition. Authentication settings on the OSPF peers no longer match, so received protocol packets are rejected.

C:

This diagnoses a different mechanism: NSSA external routes use type-7 LSAs internally and depend on translation for normal areas. The reported symptom at the Redwood medical campus instead concerns ospf authentication mismatch.

Question 246

At the Cedarbrook hospital, OSPF neighbors on the transit link repeatedly fail to reach Full state after one router's authentication key was rotated. Which underlying technical condition best accounts for this evidence?

  1. A virtual link cannot use a stub area as its transit area to repair backbone connectivity.
  2. Authentication settings on the OSPF peers no longer match, so received protocol packets are rejected.
  3. The OSPF Hello options differ because one router does not agree that the area is a stub.
  4. OSPF neighbor packets describe incompatible area membership for a common link.

Explanation

Correct Answer

B:

This diagnosis fits the symptoms at the Cedarbrook hospital. Authentication settings on the OSPF peers no longer match, so received protocol packets are rejected. The remedial action is: Align OSPF authentication type, algorithm and matching credentials across the shared link.

Incorrect Answers

A:

This diagnoses a different mechanism: A virtual link cannot use a stub area as its transit area to repair backbone connectivity. The reported symptom at the Cedarbrook hospital instead concerns ospf authentication mismatch.

C:

The observation at the Cedarbrook hospital does not point to ospf stub area options mismatch; it points to a different condition. Authentication settings on the OSPF peers no longer match, so received protocol packets are rejected.

D:

This diagnoses a different mechanism: OSPF neighbor packets describe incompatible area membership for a common link. The reported symptom at the Cedarbrook hospital instead concerns ospf authentication mismatch.

Question 247

At the Bayview university campus, R-BAY-DIST1 and R-ALB-DIST2 see each other's OSPF hellos, but the neighbor stalls in ExStart after an interface MTU change. Which underlying technical condition best accounts for this evidence?

  1. Authentication settings on the OSPF peers no longer match, so received protocol packets are rejected.
  2. OSPF neighbor packets describe incompatible area membership for a common link.
  3. OSPF prefers intra-area routes to inter-area routes for the same prefix even when cost figures differ.
  4. Incompatible interface MTU values can prevent successful OSPF database-description exchange.

Explanation

Correct Answer

D:

The evidence at the Bayview university campus supports this condition: Incompatible interface MTU values can prevent successful OSPF database-description exchange. The associated fix is: Correct the interface MTU mismatch rather than bypassing the OSPF database-description check.

Incorrect Answers

A:

The observation at the Bayview university campus does not point to ospf authentication mismatch; it points to a different condition. Incompatible interface MTU values can prevent successful OSPF database-description exchange.

B:

This diagnoses a different mechanism: OSPF neighbor packets describe incompatible area membership for a common link. The reported symptom at the Bayview university campus instead concerns ospf mtu exstart.

C:

That diagnosis belongs to ospf intra-area route preference, while the observation at the Bayview university campus points to ospf mtu exstart.

Question 248

At the Clearwater library district, R-CLW-EDGE1 and R-WES-RT2 see each other's OSPF hellos, but the neighbor stalls in ExStart after an interface MTU change. Which underlying technical condition best accounts for this evidence?

  1. A virtual link cannot use a stub area as its transit area to repair backbone connectivity.
  2. Incompatible interface MTU values can prevent successful OSPF database-description exchange.
  3. OSPF prefers intra-area routes to inter-area routes for the same prefix even when cost figures differ.
  4. The OSPF Hello options differ because one router does not agree that the area is a stub.

Explanation

Correct Answer

B:

The evidence at the Clearwater library district supports this condition: Incompatible interface MTU values can prevent successful OSPF database-description exchange. The associated fix is: Correct the interface MTU mismatch rather than bypassing the OSPF database-description check.

Incorrect Answers

A:

That diagnosis belongs to ospf virtual link transit area, while the observation at the Clearwater library district points to ospf mtu exstart.

C:

This diagnoses a different mechanism: OSPF prefers intra-area routes to inter-area routes for the same prefix even when cost figures differ. The reported symptom at the Clearwater library district instead concerns ospf mtu exstart.

D:

That diagnosis belongs to ospf stub area options mismatch, while the observation at the Clearwater library district points to ospf mtu exstart.

Question 249

At the Highland government office, a point-to-point circuit is modeled as broadcast on one OSPF side and point-to-point on the other, producing inconsistent neighbor behavior. Which underlying technical condition best accounts for this evidence?

  1. OSPF neighbor packets describe incompatible area membership for a common link.
  2. OSPF prefers intra-area routes to inter-area routes for the same prefix even when cost figures differ.
  3. Different OSPF network-type expectations lead to inconsistent adjacency and DR behavior.
  4. Authentication settings on the OSPF peers no longer match, so received protocol packets are rejected.

Explanation

Correct Answer

C:

The evidence at the Highland government office supports this condition: Different OSPF network-type expectations lead to inconsistent adjacency and DR behavior. The associated fix is: Set compatible OSPF network types appropriate to the actual transit medium on both ends.

Incorrect Answers

A:

This diagnoses a different mechanism: OSPF neighbor packets describe incompatible area membership for a common link. The reported symptom at the Highland government office instead concerns ospf dr network-type mismatch.

B:

That diagnosis belongs to ospf intra-area route preference, while the observation at the Highland government office points to ospf dr network-type mismatch.

D:

This diagnoses a different mechanism: Authentication settings on the OSPF peers no longer match, so received protocol packets are rejected. The reported symptom at the Highland government office instead concerns ospf dr network-type mismatch.

Question 250

At the Foothill municipal site, a point-to-point circuit is modeled as broadcast on one OSPF side and point-to-point on the other, producing inconsistent neighbor behavior. Which underlying technical condition best accounts for this evidence?

  1. Incompatible interface MTU values can prevent successful OSPF database-description exchange.
  2. OSPF neighbor packets describe incompatible area membership for a common link.
  3. Authentication settings on the OSPF peers no longer match, so received protocol packets are rejected.
  4. Different OSPF network-type expectations lead to inconsistent adjacency and DR behavior.

Explanation

Correct Answer

D:

The evidence at the Foothill municipal site supports this condition: Different OSPF network-type expectations lead to inconsistent adjacency and DR behavior. The associated fix is: Set compatible OSPF network types appropriate to the actual transit medium on both ends.

Incorrect Answers

A:

The observation at the Foothill municipal site does not point to ospf mtu exstart; it points to a different condition. Different OSPF network-type expectations lead to inconsistent adjacency and DR behavior.

B:

This diagnoses a different mechanism: OSPF neighbor packets describe incompatible area membership for a common link. The reported symptom at the Foothill municipal site instead concerns ospf dr network-type mismatch.

C:

That diagnosis belongs to ospf authentication mismatch, while the observation at the Foothill municipal site points to ospf dr network-type mismatch.