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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 6

Question 50

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 operational change most directly addresses the fault described?

  1. Configure the two ends of the intended OSPF adjacency in the same area.
  2. Set compatible OSPF network types appropriate to the actual transit medium on both ends.
  3. Correct the interface MTU mismatch rather than bypassing the OSPF database-description check.
  4. Make OSPF stub-area attributes consistent for the peers sharing the area.

Explanation

Correct Answer

B:

At the Foothill municipal site, the evidence points to a concrete mechanism rather than a generic outage. Different OSPF network-type expectations lead to inconsistent adjacency and DR behavior. Set compatible OSPF network types appropriate to the actual transit medium on both ends. Confirm it by checking that both interfaces show the planned network type and the adjacency becomes Full.

Incorrect Answers

A:

This could help where ospf area mismatch is the issue, but not for the evidence reported at the Foothill municipal site. Different OSPF network-type expectations lead to inconsistent adjacency and DR behavior.

C:

This is appropriate for a different routing or network-control issue: Incompatible interface MTU values can prevent successful OSPF database-description exchange. The stated evidence at the Foothill municipal site instead concerns ospf dr network-type mismatch.

D:

This could help where ospf stub area options mismatch is the issue, but not for the evidence reported at the Foothill municipal site. Different OSPF network-type expectations lead to inconsistent adjacency and DR behavior.

Question 51

At the Silverstream data center, routers in an OSPF stub area disagree on stub-area capability and fail to form neighbors after R-RIV-PE2 was reconfigured. Which operational change most directly addresses the fault described?

  1. Make OSPF stub-area attributes consistent for the peers sharing the area.
  2. Correct the interface MTU mismatch rather than bypassing the OSPF database-description check.
  3. Align OSPF authentication type, algorithm and matching credentials across the shared link.
  4. Set compatible OSPF network types appropriate to the actual transit medium on both ends.

Explanation

Correct Answer

A:

The fault at the Silverstream data center has a specific cause. The OSPF Hello options differ because one router does not agree that the area is a stub. Make OSPF stub-area attributes consistent for the peers sharing the area. Confirm success against this result: OSPF neighbors reach Full and the intended stub-area LSAs are present.

Incorrect Answers

B:

This could help where ospf mtu exstart is the issue, but not for the evidence reported at the Silverstream data center. The OSPF Hello options differ because one router does not agree that the area is a stub.

C:

That change targets ospf authentication mismatch, not the reported ospf stub area options mismatch fault at the Silverstream data center. The OSPF Hello options differ because one router does not agree that the area is a stub.

D:

This is appropriate for a different routing or network-control issue: Different OSPF network-type expectations lead to inconsistent adjacency and DR behavior. The stated evidence at the Silverstream data center instead concerns ospf stub area options mismatch.

Question 52

At the Brookstone distribution branch, routers in an OSPF stub area disagree on stub-area capability and fail to form neighbors after R-NEW-EDGE2 was reconfigured. Which operational change most directly addresses the fault described?

  1. Evaluate OSPF path type precedence before comparing costs between intra-area and inter-area candidates.
  2. Make OSPF stub-area attributes consistent for the peers sharing the area.
  3. Verify NSSA type-7 origination and the ABR translation behavior for the external prefix.
  4. Set compatible OSPF network types appropriate to the actual transit medium on both ends.

Explanation

Correct Answer

B:

The fault at the Brookstone distribution branch has a specific cause. The OSPF Hello options differ because one router does not agree that the area is a stub. Make OSPF stub-area attributes consistent for the peers sharing the area. Confirm success against this result: OSPF neighbors reach Full and the intended stub-area LSAs are present.

Incorrect Answers

A:

That change targets ospf intra-area route preference, not the reported ospf stub area options mismatch fault at the Brookstone distribution branch. The OSPF Hello options differ because one router does not agree that the area is a stub.

C:

This could help where ospf nssa external routes is the issue, but not for the evidence reported at the Brookstone distribution branch. The OSPF Hello options differ because one router does not agree that the area is a stub.

D:

That change targets ospf dr network-type mismatch, not the reported ospf stub area options mismatch fault at the Brookstone distribution branch. The OSPF Hello options differ because one router does not agree that the area is a stub.

Question 53

At the Southridge banking office, an ASBR inside an OSPF NSSA originates an external route, but the ABR is not translating the expected type-7 route for other areas. Which operational change most directly addresses the fault described?

  1. Align OSPF authentication type, algorithm and matching credentials across the shared link.
  2. Make OSPF stub-area attributes consistent for the peers sharing the area.
  3. Verify NSSA type-7 origination and the ABR translation behavior for the external prefix.
  4. Configure the two ends of the intended OSPF adjacency in the same area.

Explanation

Correct Answer

C:

The fault at the Southridge banking office has a specific cause. NSSA external routes use type-7 LSAs internally and depend on translation for normal areas. Verify NSSA type-7 origination and the ABR translation behavior for the external prefix. Confirm success against this result: The appropriate type-7 route appears inside the NSSA and a translated external route appears elsewhere.

Incorrect Answers

A:

This could help where ospf authentication mismatch is the issue, but not for the evidence reported at the Southridge banking office. NSSA external routes use type-7 LSAs internally and depend on translation for normal areas.

B:

That change targets ospf stub area options mismatch, not the reported ospf nssa external routes fault at the Southridge banking office. NSSA external routes use type-7 LSAs internally and depend on translation for normal areas.

D:

This could help where ospf area mismatch is the issue, but not for the evidence reported at the Southridge banking office. NSSA external routes use type-7 LSAs internally and depend on translation for normal areas.

Question 54

At the Lakeside transit hub, an ASBR inside an OSPF NSSA originates an external route, but the ABR is not translating the expected type-7 route for other areas. Which operational change most directly addresses the fault described?

  1. Verify NSSA type-7 origination and the ABR translation behavior for the external prefix.
  2. Configure the two ends of the intended OSPF adjacency in the same area.
  3. Set compatible OSPF network types appropriate to the actual transit medium on both ends.
  4. Correct the interface MTU mismatch rather than bypassing the OSPF database-description check.

Explanation

Correct Answer

A:

The fault at the Lakeside transit hub has a specific cause. NSSA external routes use type-7 LSAs internally and depend on translation for normal areas. Verify NSSA type-7 origination and the ABR translation behavior for the external prefix. Confirm success against this result: The appropriate type-7 route appears inside the NSSA and a translated external route appears elsewhere.

Incorrect Answers

B:

This could help where ospf area mismatch is the issue, but not for the evidence reported at the Lakeside transit hub. NSSA external routes use type-7 LSAs internally and depend on translation for normal areas.

C:

That change targets ospf dr network-type mismatch, not the reported ospf nssa external routes fault at the Lakeside transit hub. NSSA external routes use type-7 LSAs internally and depend on translation for normal areas.

D:

This is appropriate for a different routing or network-control issue: Incompatible interface MTU values can prevent successful OSPF database-description exchange. The stated evidence at the Lakeside transit hub instead concerns ospf nssa external routes.

Question 55

At the Pinecrest freight terminal, an isolated OSPF area cannot reach the backbone through its intended ABR because the virtual link traverses a stub transit area. Which operational change most directly addresses the fault described?

  1. Evaluate OSPF path type precedence before comparing costs between intra-area and inter-area candidates.
  2. Set compatible OSPF network types appropriate to the actual transit medium on both ends.
  3. Rework the backbone connection or place the OSPF virtual link over an eligible non-stub transit area.
  4. Make OSPF stub-area attributes consistent for the peers sharing the area.

Explanation

Correct Answer

C:

Rework the backbone connection or place the OSPF virtual link over an eligible non-stub transit area. That directly addresses the documented condition at the Pinecrest freight terminal: A virtual link cannot use a stub area as its transit area to repair backbone connectivity. Confirmation should show that the virtual link reaches Full and the isolated area's backbone reachability is restored.

Incorrect Answers

A:

That change targets ospf intra-area route preference, not the reported ospf virtual link transit area fault at the Pinecrest freight terminal. A virtual link cannot use a stub area as its transit area to repair backbone connectivity.

B:

This is appropriate for a different routing or network-control issue: Different OSPF network-type expectations lead to inconsistent adjacency and DR behavior. The stated evidence at the Pinecrest freight terminal instead concerns ospf virtual link transit area.

D:

That change targets ospf stub area options mismatch, not the reported ospf virtual link transit area fault at the Pinecrest freight terminal. A virtual link cannot use a stub area as its transit area to repair backbone connectivity.

Question 56

At the Westlake utility network, an isolated OSPF area cannot reach the backbone through its intended ABR because the virtual link traverses a stub transit area. Which operational change most directly addresses the fault described?

  1. Make OSPF stub-area attributes consistent for the peers sharing the area.
  2. Evaluate OSPF path type precedence before comparing costs between intra-area and inter-area candidates.
  3. Rework the backbone connection or place the OSPF virtual link over an eligible non-stub transit area.
  4. Verify NSSA type-7 origination and the ABR translation behavior for the external prefix.

Explanation

Correct Answer

C:

The fault at the Westlake utility network has a specific cause. A virtual link cannot use a stub area as its transit area to repair backbone connectivity. Rework the backbone connection or place the OSPF virtual link over an eligible non-stub transit area. Confirm success against this result: The virtual link reaches Full and the isolated area's backbone reachability is restored.

Incorrect Answers

A:

This could help where ospf stub area options mismatch is the issue, but not for the evidence reported at the Westlake utility network. A virtual link cannot use a stub area as its transit area to repair backbone connectivity.

B:

That change targets ospf intra-area route preference, not the reported ospf virtual link transit area fault at the Westlake utility network. A virtual link cannot use a stub area as its transit area to repair backbone connectivity.

D:

This could help where ospf nssa external routes is the issue, but not for the evidence reported at the Westlake utility network. A virtual link cannot use a stub area as its transit area to repair backbone connectivity.

Question 57

At the Bluewater clinical network, an OSPF prefix arrives as an intra-area and an inter-area path, but an engineer assumes the lower displayed metric always makes the inter-area route preferable. Which operational change most directly addresses the fault described?

  1. Align OSPF authentication type, algorithm and matching credentials across the shared link.
  2. Evaluate OSPF path type precedence before comparing costs between intra-area and inter-area candidates.
  3. Rework the backbone connection or place the OSPF virtual link over an eligible non-stub transit area.
  4. Set compatible OSPF network types appropriate to the actual transit medium on both ends.

Explanation

Correct Answer

B:

Evaluate OSPF path type precedence before comparing costs between intra-area and inter-area candidates. That directly addresses the documented condition at the Bluewater clinical network: OSPF prefers intra-area routes to inter-area routes for the same prefix even when cost figures differ. Confirmation should show that the route type in the routing table matches OSPF path-preference rules.

Incorrect Answers

A:

This is appropriate for a different routing or network-control issue: Authentication settings on the OSPF peers no longer match, so received protocol packets are rejected. The stated evidence at the Bluewater clinical network instead concerns ospf intra-area route preference.

C:

That change targets ospf virtual link transit area, not the reported ospf intra-area route preference fault at the Bluewater clinical network. OSPF prefers intra-area routes to inter-area routes for the same prefix even when cost figures differ.

D:

This is appropriate for a different routing or network-control issue: Different OSPF network-type expectations lead to inconsistent adjacency and DR behavior. The stated evidence at the Bluewater clinical network instead concerns ospf intra-area route preference.

Question 58

At the Cedarfield retail branch, an OSPF prefix arrives as an intra-area and an inter-area path, but an engineer assumes the lower displayed metric always makes the inter-area route preferable. Which operational change most directly addresses the fault described?

  1. Verify NSSA type-7 origination and the ABR translation behavior for the external prefix.
  2. Set compatible OSPF network types appropriate to the actual transit medium on both ends.
  3. Rework the backbone connection or place the OSPF virtual link over an eligible non-stub transit area.
  4. Evaluate OSPF path type precedence before comparing costs between intra-area and inter-area candidates.

Explanation

Correct Answer

D:

At the Cedarfield retail branch, the evidence points to a concrete mechanism rather than a generic outage. OSPF prefers intra-area routes to inter-area routes for the same prefix even when cost figures differ. Evaluate OSPF path type precedence before comparing costs between intra-area and inter-area candidates. Confirm it by checking that the route type in the routing table matches OSPF path-preference rules.

Incorrect Answers

A:

That change targets ospf nssa external routes, not the reported ospf intra-area route preference fault at the Cedarfield retail branch. OSPF prefers intra-area routes to inter-area routes for the same prefix even when cost figures differ.

B:

This is appropriate for a different routing or network-control issue: Different OSPF network-type expectations lead to inconsistent adjacency and DR behavior. The stated evidence at the Cedarfield retail branch instead concerns ospf intra-area route preference.

C:

This could help where ospf virtual link transit area is the issue, but not for the evidence reported at the Cedarfield retail branch. OSPF prefers intra-area routes to inter-area routes for the same prefix even when cost figures differ.

Question 59

At the Ironwood training campus, R-IRN-RT1 must peer by eBGP with a reachable loopback on R-CLR-RT2 multiple routed hops away; TCP never reaches Established using default TTL behavior. Which operational change most directly addresses the fault described?

  1. Configure eBGP multihop and reliable loopback reachability for the non-direct peer as appropriate.
  2. Apply an appropriate AS-wide policy such as local preference rather than relying on router-local weight.
  3. Attach an inbound BGP prefix filter that explicitly permits the authorized customer set and rejects the rest.
  4. Use a consistent BGP local-preference policy within the AS to favor the required exit.

Explanation

Correct Answer

A:

Configure eBGP multihop and reliable loopback reachability for the non-direct peer as appropriate. That directly addresses the documented condition at the Ironwood training campus: The default eBGP directly connected peer assumptions do not support this multiple-hop session. Confirmation should show that BGP reaches Established over the loopback path and exchanges authorized prefixes.

Incorrect Answers

B:

That change targets bgp cisco weight local only, not the reported ebgp non-direct neighbor multihop fault at the Ironwood training campus. The default eBGP directly connected peer assumptions do not support this multiple-hop session.

C:

This is appropriate for a different routing or network-control issue: The current inbound BGP policy fails to constrain accepted advertisements to contracted prefixes. The stated evidence at the Ironwood training campus instead concerns ebgp non-direct neighbor multihop.

D:

This could help where bgp local preference path policy is the issue, but not for the evidence reported at the Ironwood training campus. The default eBGP directly connected peer assumptions do not support this multiple-hop session.

Question 60

At the Harborview media campus, R-HAR-DIST1 must peer by eBGP with a reachable loopback on R-INL-DIST2 multiple routed hops away; TCP never reaches Established using default TTL behavior. Which operational change most directly addresses the fault described?

  1. Use a consistent BGP local-preference policy within the AS to favor the required exit.
  2. Provide an IGP route to the external next hop or use an appropriate next-hop-self policy on the advertising iBGP router.
  3. Attach an inbound BGP prefix filter that explicitly permits the authorized customer set and rejects the rest.
  4. Configure eBGP multihop and reliable loopback reachability for the non-direct peer as appropriate.

Explanation

Correct Answer

D:

The fault at the Harborview media campus has a specific cause. The default eBGP directly connected peer assumptions do not support this multiple-hop session. Configure eBGP multihop and reliable loopback reachability for the non-direct peer as appropriate. Confirm success against this result: BGP reaches Established over the loopback path and exchanges authorized prefixes.

Incorrect Answers

A:

This is appropriate for a different routing or network-control issue: BGP local preference is examined before AS-path length, and the present attributes favor the wrong exit. The stated evidence at the Harborview media campus instead concerns ebgp non-direct neighbor multihop.

B:

This could help where ibgp next-hop reachability is the issue, but not for the evidence reported at the Harborview media campus. The default eBGP directly connected peer assumptions do not support this multiple-hop session.

C:

That change targets bgp inbound prefix filtering, not the reported ebgp non-direct neighbor multihop fault at the Harborview media campus. The default eBGP directly connected peer assumptions do not support this multiple-hop session.