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Exam Code: JN0-650

Exam Name: Enterprise Routing and Switching, Professional (JNCIP-ENT)

Certification Provider: Juniper

Corresponding Certification: JNCIP-ENT

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Juniper JN0-650 Practice Test 8

Question 70

A Junos network engineer takes this step: Check the interface link-local IPv6 communication used by OSPFv3 neighboring. Which outcome most directly follows?

  1. Downstream routers can learn an aggregate IPv6 prefix rather than every component network.
  2. Link-local addressing supports OSPFv3 adjacency on the same link.
  3. Selected external IPv6 reachability can be advertised into OSPFv3 rather than leaking all static routes.
  4. The engineer can see adjacency state and whether OSPFv3 runs on the expected interface.

Explanation

Correct Answer

B:

This is the direct result of the OSPFv3 link-local adjacency decision: Link-local addressing supports OSPFv3 adjacency on the same link.

Incorrect Answers

A:

This outcome is associated with IPv6 route summarization (Configure a supported interarea IPv6 route summary for the appropriate OSPFv3 area.), not the specified action.

C:

This outcome is associated with OSPFv3 IPv6 external (Apply an appropriate export policy to the OSPFv3 instance for the selected IPv6 route.), not the specified action.

D:

This outcome is associated with OSPFv3 neighbor visibility (Use Junos OSPFv3 operational neighbor and interface inspection rather than only pinging IPv6 addresses.), not the specified action.

Question 71

An OSPFv3 peering troubleshooter assumes neighbors must use their global IPv6 addresses for all Hello exchanges. A colleague instead suggests: Use Junos OSPFv3 operational neighbor and interface inspection rather than only pinging IPv6 addresses. Which corrective approach most directly addresses the original issue?

  1. Apply an appropriate export policy to the OSPFv3 instance for the selected IPv6 route.
  2. Configure a supported interarea IPv6 route summary for the appropriate OSPFv3 area.
  3. Check the interface link-local IPv6 communication used by OSPFv3 neighboring.
  4. Use Junos OSPFv3 operational neighbor and interface inspection rather than only pinging IPv6 addresses.

Explanation

Correct Answer

C:

This corrective choice addresses OSPFv3 link-local adjacency. Link-local addressing supports OSPFv3 adjacency on the same link.

Incorrect Answers

A:

That alternative applies to OSPFv3 IPv6 external instead. Selected external IPv6 reachability can be advertised into OSPFv3 rather than leaking all static routes.

B:

That alternative applies to IPv6 route summarization instead. Downstream routers can learn an aggregate IPv6 prefix rather than every component network.

D:

That alternative applies to OSPFv3 neighbor visibility instead. The engineer can see adjacency state and whether OSPFv3 runs on the expected interface.

Question 72

An enterprise network designer recommends: Check the interface link-local IPv6 communication used by OSPFv3 neighboring. Which situation most clearly calls for this action?

  1. An external IPv6 static prefix is present in a Junos routing table but must be deliberately advertised into the OSPFv3 domain.
  2. An IPv6 subnet has intermittent OSPFv3 forwarding and operations needs evidence of the actual neighbor FSM.
  3. An OSPFv3 area border router exports many contiguous IPv6 networks into the backbone and the design requires fewer interarea entries.
  4. An OSPFv3 peering troubleshooter assumes neighbors must use their global IPv6 addresses for all Hello exchanges.

Explanation

Correct Answer

D:

This case requires the OSPFv3 link-local adjacency action. Link-local addressing supports OSPFv3 adjacency on the same link.

Incorrect Answers

A:

This other case would be better matched to Apply an appropriate export policy to the OSPFv3 instance for the selected IPv6 route. Selected external IPv6 reachability can be advertised into OSPFv3 rather than leaking all static routes.

B:

This other case would be better matched to Use Junos OSPFv3 operational neighbor and interface inspection rather than only pinging IPv6 addresses. The engineer can see adjacency state and whether OSPFv3 runs on the expected interface.

C:

This other case would be better matched to Configure a supported interarea IPv6 route summary for the appropriate OSPFv3 area. Downstream routers can learn an aggregate IPv6 prefix rather than every component network.

Question 73

Two IPv6 routers exchange OSPFv3 Hellos but one interface belongs to area 0.0.0.2 and the other to area 0.0.0.0. Which Junos networking action or protocol decision best addresses this requirement?

  1. Apply an appropriate export policy to the OSPFv3 instance for the selected IPv6 route.
  2. Align the intended OSPFv3 interface area numbers on the adjacent routers.
  3. Configure a supported interarea IPv6 route summary for the appropriate OSPFv3 area.
  4. Configure the applicable Junos OSPFv3 process and IPv6 interfaces in the correct area.

Explanation

Correct Answer

B:

This action addresses OSPFv3 area mismatch. The area-identifier mismatch no longer prevents the OSPFv3 adjacency.

Incorrect Answers

A:

That action targets OSPFv3 IPv6 external: Selected external IPv6 reachability can be advertised into OSPFv3 rather than leaking all static routes. It does not directly resolve the stated OSPFv3 area mismatch requirement.

C:

That action targets IPv6 route summarization: Downstream routers can learn an aggregate IPv6 prefix rather than every component network. It does not directly resolve the stated OSPFv3 area mismatch requirement.

D:

That action targets OSPFv3 IPv6 routing: OSPFv3 can exchange supported IPv6 routing information across the configured links. It does not directly resolve the stated OSPFv3 area mismatch requirement.

Question 74

A Junos network engineer takes this step: Align the intended OSPFv3 interface area numbers on the adjacent routers. Which outcome most directly follows?

  1. OSPFv3 can exchange supported IPv6 routing information across the configured links.
  2. Selected external IPv6 reachability can be advertised into OSPFv3 rather than leaking all static routes.
  3. The area-identifier mismatch no longer prevents the OSPFv3 adjacency.
  4. Downstream routers can learn an aggregate IPv6 prefix rather than every component network.

Explanation

Correct Answer

C:

This is the direct result of the OSPFv3 area mismatch decision: The area-identifier mismatch no longer prevents the OSPFv3 adjacency.

Incorrect Answers

A:

This outcome is associated with OSPFv3 IPv6 routing (Configure the applicable Junos OSPFv3 process and IPv6 interfaces in the correct area.), not the specified action.

B:

This outcome is associated with OSPFv3 IPv6 external (Apply an appropriate export policy to the OSPFv3 instance for the selected IPv6 route.), not the specified action.

D:

This outcome is associated with IPv6 route summarization (Configure a supported interarea IPv6 route summary for the appropriate OSPFv3 area.), not the specified action.

Question 75

Two IPv6 routers exchange OSPFv3 Hellos but one interface belongs to area 0.0.0.2 and the other to area 0.0.0.0. A colleague instead suggests: Configure a supported interarea IPv6 route summary for the appropriate OSPFv3 area. Which corrective approach most directly addresses the original issue?

  1. Configure a supported interarea IPv6 route summary for the appropriate OSPFv3 area.
  2. Apply an appropriate export policy to the OSPFv3 instance for the selected IPv6 route.
  3. Configure the applicable Junos OSPFv3 process and IPv6 interfaces in the correct area.
  4. Align the intended OSPFv3 interface area numbers on the adjacent routers.

Explanation

Correct Answer

D:

This corrective choice addresses OSPFv3 area mismatch. The area-identifier mismatch no longer prevents the OSPFv3 adjacency.

Incorrect Answers

A:

That alternative applies to IPv6 route summarization instead. Downstream routers can learn an aggregate IPv6 prefix rather than every component network.

B:

That alternative applies to OSPFv3 IPv6 external instead. Selected external IPv6 reachability can be advertised into OSPFv3 rather than leaking all static routes.

C:

That alternative applies to OSPFv3 IPv6 routing instead. OSPFv3 can exchange supported IPv6 routing information across the configured links.

Question 76

An enterprise network designer recommends: Align the intended OSPFv3 interface area numbers on the adjacent routers. Which situation most clearly calls for this action?

  1. Two IPv6 routers exchange OSPFv3 Hellos but one interface belongs to area 0.0.0.2 and the other to area 0.0.0.0.
  2. An enterprise has IPv6 interface addresses but only OSPFv2 has been enabled for the existing IPv4 routing domain.
  3. An OSPFv3 area border router exports many contiguous IPv6 networks into the backbone and the design requires fewer interarea entries.
  4. An external IPv6 static prefix is present in a Junos routing table but must be deliberately advertised into the OSPFv3 domain.

Explanation

Correct Answer

A:

This case requires the OSPFv3 area mismatch action. The area-identifier mismatch no longer prevents the OSPFv3 adjacency.

Incorrect Answers

B:

This other case would be better matched to Configure the applicable Junos OSPFv3 process and IPv6 interfaces in the correct area. OSPFv3 can exchange supported IPv6 routing information across the configured links.

C:

This other case would be better matched to Configure a supported interarea IPv6 route summary for the appropriate OSPFv3 area. Downstream routers can learn an aggregate IPv6 prefix rather than every component network.

D:

This other case would be better matched to Apply an appropriate export policy to the OSPFv3 instance for the selected IPv6 route. Selected external IPv6 reachability can be advertised into OSPFv3 rather than leaking all static routes.

Question 77

An IPv6 subnet has intermittent OSPFv3 forwarding and operations needs evidence of the actual neighbor FSM. Which Junos networking action or protocol decision best addresses this requirement?

  1. Apply an appropriate export policy to the OSPFv3 instance for the selected IPv6 route.
  2. Use Junos OSPFv3 operational neighbor and interface inspection rather than only pinging IPv6 addresses.
  3. Configure the applicable Junos OSPFv3 process and IPv6 interfaces in the correct area.
  4. Check the interface link-local IPv6 communication used by OSPFv3 neighboring.

Explanation

Correct Answer

B:

This action addresses OSPFv3 neighbor visibility. The engineer can see adjacency state and whether OSPFv3 runs on the expected interface.

Incorrect Answers

A:

That action targets OSPFv3 IPv6 external: Selected external IPv6 reachability can be advertised into OSPFv3 rather than leaking all static routes. It does not directly resolve the stated OSPFv3 neighbor visibility requirement.

C:

That action targets OSPFv3 IPv6 routing: OSPFv3 can exchange supported IPv6 routing information across the configured links. It does not directly resolve the stated OSPFv3 neighbor visibility requirement.

D:

That action targets OSPFv3 link-local adjacency: Link-local addressing supports OSPFv3 adjacency on the same link. It does not directly resolve the stated OSPFv3 neighbor visibility requirement.

Question 78

A Junos network engineer takes this step: Use Junos OSPFv3 operational neighbor and interface inspection rather than only pinging IPv6 addresses. Which outcome most directly follows?

  1. Selected external IPv6 reachability can be advertised into OSPFv3 rather than leaking all static routes.
  2. Link-local addressing supports OSPFv3 adjacency on the same link.
  3. The engineer can see adjacency state and whether OSPFv3 runs on the expected interface.
  4. OSPFv3 can exchange supported IPv6 routing information across the configured links.

Explanation

Correct Answer

C:

This is the direct result of the OSPFv3 neighbor visibility decision: The engineer can see adjacency state and whether OSPFv3 runs on the expected interface.

Incorrect Answers

A:

This outcome is associated with OSPFv3 IPv6 external (Apply an appropriate export policy to the OSPFv3 instance for the selected IPv6 route.), not the specified action.

B:

This outcome is associated with OSPFv3 link-local adjacency (Check the interface link-local IPv6 communication used by OSPFv3 neighboring.), not the specified action.

D:

This outcome is associated with OSPFv3 IPv6 routing (Configure the applicable Junos OSPFv3 process and IPv6 interfaces in the correct area.), not the specified action.

Question 79

An IPv6 subnet has intermittent OSPFv3 forwarding and operations needs evidence of the actual neighbor FSM. A colleague instead suggests: Apply an appropriate export policy to the OSPFv3 instance for the selected IPv6 route. Which corrective approach most directly addresses the original issue?

  1. Check the interface link-local IPv6 communication used by OSPFv3 neighboring.
  2. Configure the applicable Junos OSPFv3 process and IPv6 interfaces in the correct area.
  3. Apply an appropriate export policy to the OSPFv3 instance for the selected IPv6 route.
  4. Use Junos OSPFv3 operational neighbor and interface inspection rather than only pinging IPv6 addresses.

Explanation

Correct Answer

D:

This corrective choice addresses OSPFv3 neighbor visibility. The engineer can see adjacency state and whether OSPFv3 runs on the expected interface.

Incorrect Answers

A:

That alternative applies to OSPFv3 link-local adjacency instead. Link-local addressing supports OSPFv3 adjacency on the same link.

B:

That alternative applies to OSPFv3 IPv6 routing instead. OSPFv3 can exchange supported IPv6 routing information across the configured links.

C:

That alternative applies to OSPFv3 IPv6 external instead. Selected external IPv6 reachability can be advertised into OSPFv3 rather than leaking all static routes.

Question 80

An enterprise network designer recommends: Use Junos OSPFv3 operational neighbor and interface inspection rather than only pinging IPv6 addresses. Which situation most clearly calls for this action?

  1. An IPv6 subnet has intermittent OSPFv3 forwarding and operations needs evidence of the actual neighbor FSM.
  2. An external IPv6 static prefix is present in a Junos routing table but must be deliberately advertised into the OSPFv3 domain.
  3. An enterprise has IPv6 interface addresses but only OSPFv2 has been enabled for the existing IPv4 routing domain.
  4. An OSPFv3 peering troubleshooter assumes neighbors must use their global IPv6 addresses for all Hello exchanges.

Explanation

Correct Answer

A:

This case requires the OSPFv3 neighbor visibility action. The engineer can see adjacency state and whether OSPFv3 runs on the expected interface.

Incorrect Answers

B:

This other case would be better matched to Apply an appropriate export policy to the OSPFv3 instance for the selected IPv6 route. Selected external IPv6 reachability can be advertised into OSPFv3 rather than leaking all static routes.

C:

This other case would be better matched to Configure the applicable Junos OSPFv3 process and IPv6 interfaces in the correct area. OSPFv3 can exchange supported IPv6 routing information across the configured links.

D:

This other case would be better matched to Check the interface link-local IPv6 communication used by OSPFv3 neighboring. Link-local addressing supports OSPFv3 adjacency on the same link.

Enterprise Routing and Switching, Professional (JNCIP-ENT) (JN0-650) Practice Tests