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Juniper JN0-364 Practice Test 9

Question 80

A Junos service-provider engineer is reviewing this operational case: Two new PEs advertise the same OSPF router ID and routes flap. What specific configuration or diagnostic action BEST implements the intended response? Select ONE best answer.

  1. Select and configure distinct persistent router IDs
  2. Configure a supported OSPF point-to-point interface type on both ends
  3. Check show ospf database then show route protocol ospf
  4. Place relevant interfaces and route processing into separate configured instances

Explanation

Correct Answer

A:

Select and configure distinct persistent router IDs is the best implementation and troubleshooting step for this Junos service-provider case: Two new PEs advertise the same OSPF router ID and routes flap. Technical basis: OSPF router IDs identify LSA originators and adjacencies and must not collide.

Incorrect Answers

B:

Configure a supported OSPF point-to-point interface type on both ends is relevant to the different engineering topic "OSPF interface network type", but it is not the most directly supported implementation and troubleshooting step for this precise case: Two new PEs advertise the same OSPF router ID and routes flap. the best answer here is: Select and configure distinct persistent router IDs.

C:

Check show ospf database then show route protocol ospf is relevant to the different engineering topic "OSPF operational troubleshooting", but it is not the most directly supported implementation and troubleshooting step for this precise case: Two new PEs advertise the same OSPF router ID and routes flap. the best answer here is: Select and configure distinct persistent router IDs.

D:

That option concerns Routing-instance isolation. OSPF router IDs identify LSA originators and adjacencies and must not collide.

Question 81

A Junos service-provider engineer is reviewing this operational case: Two new PEs advertise the same OSPF router ID and routes flap. Which observation would MOST RELIABLY verify the intended outcome? Select ONE best answer.

  1. The SPF next hop prefers the intended lower-cost path
  2. The core neighbor becomes adjacent and the expected OSPF prefixes appear
  3. The LSDB contains distinct router advertisements with stable origins
  4. Relevant protocol state persists across a controlled failover

Explanation

Correct Answer

C:

The LSDB contains distinct router advertisements with stable origins is the best operational verification evidence for this Junos service-provider case: Two new PEs advertise the same OSPF router ID and routes flap. Technical basis: OSPF router IDs identify LSA originators and adjacencies and must not collide.

Incorrect Answers

A:

The SPF next hop prefers the intended lower-cost path is relevant to the different engineering topic "OSPF interface metric selection", but it is not the most directly supported operational verification evidence for this precise case: Two new PEs advertise the same OSPF router ID and routes flap. the best answer here is: The LSDB contains distinct router advertisements with stable origins.

B:

The core neighbor becomes adjacent and the expected OSPF prefixes appear is relevant to the different engineering topic "OSPF backbone membership", but it is not the most directly supported operational verification evidence for this precise case: Two new PEs advertise the same OSPF router ID and routes flap. the best answer here is: The LSDB contains distinct router advertisements with stable origins.

D:

That option concerns Nonstop active routing NSR. OSPF router IDs identify LSA originators and adjacencies and must not collide.

Question 82

A provider network team identifies this situation: A router gets an unexpected ID after a loopback address change. Which engineering decision BEST fits the stated requirement? Choose ONE best answer.

  1. Assign stable distinct OSPF router identifiers across the participating topology
  2. Advertise intended connected prefixes without forming unwanted OSPF neighbors on customer-facing interfaces
  3. Choose VLAN tag translation when the service needs intentional replacement of an 802.1Q tag
  4. Recognize a type-two Network LSA generated for an appropriate transit multi-access OSPF network

Explanation

Correct Answer

A:

Assign stable distinct OSPF router identifiers across the participating topology is the best technical design or decision for this Junos service-provider case: A router gets an unexpected ID after a loopback address change. Technical basis: OSPF router IDs identify LSA originators and adjacencies and must not collide.

Incorrect Answers

B:

That option concerns OSPF passive-interface and export policy. OSPF router IDs identify LSA originators and adjacencies and must not collide.

C:

That option concerns VLAN translation distinction. OSPF router IDs identify LSA originators and adjacencies and must not collide.

D:

Recognize a type-two Network LSA generated for an appropriate transit multi-access OSPF network is relevant to the different engineering topic "Network-LSA type-two interpretation", but it is not the most directly supported technical design or decision for this precise case: A router gets an unexpected ID after a loopback address change. the best answer here is: Assign stable distinct OSPF router identifiers across the participating topology.

Question 83

A provider network team identifies this situation: A router gets an unexpected ID after a loopback address change. Which implementation or troubleshooting step is MOST APPROPRIATE here? Choose ONE best answer.

  1. Inspect configured ID and process restart requirements
  2. Use appropriate broadcast network settings and inspect elected roles
  3. Check show ospf interface and link/IP state first
  4. Review higher-priority path attributes before any late tie-breakers

Explanation

Correct Answer

A:

Inspect configured ID and process restart requirements is the best implementation and troubleshooting step for this Junos service-provider case: A router gets an unexpected ID after a loopback address change. Technical basis: OSPF router IDs identify LSA originators and adjacencies and must not collide.

Incorrect Answers

B:

Use appropriate broadcast network settings and inspect elected roles is relevant to the different engineering topic "OSPF interface network type", but it is not the most directly supported implementation and troubleshooting step for this precise case: A router gets an unexpected ID after a loopback address change. the best answer here is: Inspect configured ID and process restart requirements.

C:

Check show ospf interface and link/IP state first is relevant to the different engineering topic "OSPF operational troubleshooting", but it is not the most directly supported implementation and troubleshooting step for this precise case: A router gets an unexpected ID after a loopback address change. the best answer here is: Inspect configured ID and process restart requirements.

D:

That option concerns BGP best-path selection order. OSPF router IDs identify LSA originators and adjacencies and must not collide.

Question 84

A provider network team identifies this situation: A router gets an unexpected ID after a loopback address change. What verification evidence MOST CLEARLY demonstrates the solution is working? Choose ONE best answer.

  1. Operational OSPF state reflects the intended stable identifier
  2. The segment elects appropriate DR/BDR participants and adjacent relationships
  3. The LSP stabilizes after the relevant signaling restriction is corrected
  4. The new DR represents the attached routers after convergence

Explanation

Correct Answer

A:

Operational OSPF state reflects the intended stable identifier is the best operational verification evidence for this Junos service-provider case: A router gets an unexpected ID after a loopback address change. Technical basis: OSPF router IDs identify LSA originators and adjacencies and must not collide.

Incorrect Answers

B:

The segment elects appropriate DR/BDR participants and adjacent relationships is relevant to the different engineering topic "OSPF interface network type", but it is not the most directly supported operational verification evidence for this precise case: A router gets an unexpected ID after a loopback address change. the best answer here is: Operational OSPF state reflects the intended stable identifier.

C:

That option concerns RSVP session and state troubleshooting. OSPF router IDs identify LSA originators and adjacencies and must not collide.

D:

The new DR represents the attached routers after convergence is relevant to the different engineering topic "Network-LSA type-two interpretation", but it is not the most directly supported operational verification evidence for this precise case: A router gets an unexpected ID after a loopback address change. the best answer here is: Operational OSPF state reflects the intended stable identifier.

Question 85

A Junos service-provider engineer is reviewing this operational case: An aggregation router should avoid becoming DR on a shared provider LAN. Which technical approach MOST DIRECTLY addresses the issue? Select ONE best answer.

  1. Verify OSPF hello and dead interval compatibility when two interfaces fail to become neighbors
  2. Apply appropriate OSPF interface costs and validate expected shortest paths
  3. Plan iBGP route distribution with ordinary split-horizon constraints and required topology alternatives
  4. Use interface priority and election behavior correctly when designing an OSPF broadcast segment

Explanation

Correct Answer

D:

Use interface priority and election behavior correctly when designing an OSPF broadcast segment is the best technical design or decision for this Junos service-provider case: An aggregation router should avoid becoming DR on a shared provider LAN. Technical basis: OSPF broadcast networks elect DR and BDR; priority influences election, and a zero-priority node is ineligible.

Incorrect Answers

A:

Verify OSPF hello and dead interval compatibility when two interfaces fail to become neighbors is relevant to the different engineering topic "OSPF hello/dead agreement", but it is not the most directly supported technical design or decision for this precise case: An aggregation router should avoid becoming DR on a shared provider LAN. the best answer here is: Use interface priority and election behavior correctly when designing an OSPF broadcast segment.

B:

Apply appropriate OSPF interface costs and validate expected shortest paths is relevant to the different engineering topic "OSPF interface metric selection", but it is not the most directly supported technical design or decision for this precise case: An aggregation router should avoid becoming DR on a shared provider LAN. the best answer here is: Use interface priority and election behavior correctly when designing an OSPF broadcast segment.

C:

That option concerns IBGP route propagation constraints. OSPF broadcast networks elect DR and BDR; priority influences election, and a zero-priority node is ineligible.

Question 86

A Junos service-provider engineer is reviewing this operational case: An aggregation router should avoid becoming DR on a shared provider LAN. What specific configuration or diagnostic action BEST implements the intended response? Select ONE best answer.

  1. Check the DR/BDR roles and whether both maintain Full adjacency to the DR set
  2. Configure the intended interface under OSPF area 0.0.0.0
  3. Set its OSPF interface priority to zero
  4. Enable and verify an eligible Level-2 adjacency

Explanation

Correct Answer

C:

Set its OSPF interface priority to zero is the best implementation and troubleshooting step for this Junos service-provider case: An aggregation router should avoid becoming DR on a shared provider LAN. Technical basis: OSPF broadcast networks elect DR and BDR; priority influences election, and a zero-priority node is ineligible.

Incorrect Answers

A:

Check the DR/BDR roles and whether both maintain Full adjacency to the DR set is relevant to the different engineering topic "OSPF two-way versus full neighbors", but it is not the most directly supported implementation and troubleshooting step for this precise case: An aggregation router should avoid becoming DR on a shared provider LAN. the best answer here is: Set its OSPF interface priority to zero.

B:

Configure the intended interface under OSPF area 0.0.0.0 is relevant to the different engineering topic "OSPF backbone membership", but it is not the most directly supported implementation and troubleshooting step for this precise case: An aggregation router should avoid becoming DR on a shared provider LAN. the best answer here is: Set its OSPF interface priority to zero.

D:

That option concerns IS-IS Level-1/Level-2 reachability. OSPF broadcast networks elect DR and BDR; priority influences election, and a zero-priority node is ineligible.

Question 87

A Junos service-provider engineer is reviewing this operational case: An aggregation router should avoid becoming DR on a shared provider LAN. Which observation would MOST RELIABLY verify the intended outcome? Select ONE best answer.

  1. The SPF next hop prefers the intended lower-cost path
  2. The resulting states match the expected broadcast design
  3. The failure is localized to RSVP session or path signaling
  4. Another eligible router holds the DR role while the aggregation router stays DROther

Explanation

Correct Answer

D:

Another eligible router holds the DR role while the aggregation router stays DROther is the best operational verification evidence for this Junos service-provider case: An aggregation router should avoid becoming DR on a shared provider LAN. Technical basis: OSPF broadcast networks elect DR and BDR; priority influences election, and a zero-priority node is ineligible.

Incorrect Answers

A:

The SPF next hop prefers the intended lower-cost path is relevant to the different engineering topic "OSPF interface metric selection", but it is not the most directly supported operational verification evidence for this precise case: An aggregation router should avoid becoming DR on a shared provider LAN. the best answer here is: Another eligible router holds the DR role while the aggregation router stays DROther.

B:

The resulting states match the expected broadcast design is relevant to the different engineering topic "OSPF two-way versus full neighbors", but it is not the most directly supported operational verification evidence for this precise case: An aggregation router should avoid becoming DR on a shared provider LAN. the best answer here is: Another eligible router holds the DR role while the aggregation router stays DROther.

C:

That option concerns RSVP session and state troubleshooting. OSPF broadcast networks elect DR and BDR; priority influences election, and a zero-priority node is ineligible.

Question 88

A provider network team identifies this situation: A new higher-priority router joins a stable OSPF broadcast segment. Which engineering decision BEST fits the stated requirement? Choose ONE best answer.

  1. Use interface priority and election behavior correctly when designing an OSPF broadcast segment
  2. Apply appropriate OSPF interface costs and validate expected shortest paths
  3. Verify OSPF hello and dead interval compatibility when two interfaces fail to become neighbors
  4. Apply controlled route advertisement between Level-1 and Level-2 areas instead of relying on blanket reachability

Explanation

Correct Answer

A:

Use interface priority and election behavior correctly when designing an OSPF broadcast segment is the best technical design or decision for this Junos service-provider case: A new higher-priority router joins a stable OSPF broadcast segment. Technical basis: OSPF broadcast networks elect DR and BDR; priority influences election, and a zero-priority node is ineligible.

Incorrect Answers

B:

Apply appropriate OSPF interface costs and validate expected shortest paths is relevant to the different engineering topic "OSPF interface metric selection", but it is not the most directly supported technical design or decision for this precise case: A new higher-priority router joins a stable OSPF broadcast segment. the best answer here is: Use interface priority and election behavior correctly when designing an OSPF broadcast segment.

C:

Verify OSPF hello and dead interval compatibility when two interfaces fail to become neighbors is relevant to the different engineering topic "OSPF hello/dead agreement", but it is not the most directly supported technical design or decision for this precise case: A new higher-priority router joins a stable OSPF broadcast segment. the best answer here is: Use interface priority and election behavior correctly when designing an OSPF broadcast segment.

D:

That option concerns IS-IS leaking between levels. OSPF broadcast networks elect DR and BDR; priority influences election, and a zero-priority node is ineligible.

Question 89

A provider network team identifies this situation: A new higher-priority router joins a stable OSPF broadcast segment. Which implementation or troubleshooting step is MOST APPROPRIATE here? Choose ONE best answer.

  1. Review configured GRE endpoint addressing against the new transport path
  2. Review ABR and backbone reachability before changing interface metrics
  3. Understand nonpreemptive election behavior before scheduling a reset
  4. Use appropriate broadcast network settings and inspect elected roles

Explanation

Correct Answer

C:

Understand nonpreemptive election behavior before scheduling a reset is the best implementation and troubleshooting step for this Junos service-provider case: A new higher-priority router joins a stable OSPF broadcast segment. Technical basis: OSPF broadcast networks elect DR and BDR; priority influences election, and a zero-priority node is ineligible.

Incorrect Answers

A:

That option concerns GRE source and destination addressing. OSPF broadcast networks elect DR and BDR; priority influences election, and a zero-priority node is ineligible.

B:

Review ABR and backbone reachability before changing interface metrics is relevant to the different engineering topic "OSPF backbone membership", but it is not the most directly supported implementation and troubleshooting step for this precise case: A new higher-priority router joins a stable OSPF broadcast segment. the best answer here is: Understand nonpreemptive election behavior before scheduling a reset.

D:

That option concerns OSPF interface network type. OSPF broadcast networks elect DR and BDR; priority influences election, and a zero-priority node is ineligible.

Question 90

A provider network team identifies this situation: A new higher-priority router joins a stable OSPF broadcast segment. What verification evidence MOST CLEARLY demonstrates the solution is working? Choose ONE best answer.

  1. DR changes only as defined by normal election or controlled topology events
  2. The problem is narrowed to origination, flooding or policy rather than basic adjacency
  3. The adjacency reaches Full after resolving the actual mismatch
  4. The diagnosed signaling fault is corrected without changing unrelated customer routing

Explanation

Correct Answer

A:

DR changes only as defined by normal election or controlled topology events is the best operational verification evidence for this Junos service-provider case: A new higher-priority router joins a stable OSPF broadcast segment. Technical basis: OSPF broadcast networks elect DR and BDR; priority influences election, and a zero-priority node is ineligible.

Incorrect Answers

B:

The problem is narrowed to origination, flooding or policy rather than basic adjacency is relevant to the different engineering topic "OSPF LSDB synchronization", but it is not the most directly supported operational verification evidence for this precise case: A new higher-priority router joins a stable OSPF broadcast segment. the best answer here is: DR changes only as defined by normal election or controlled topology events.

C:

The adjacency reaches Full after resolving the actual mismatch is relevant to the different engineering topic "OSPF two-way versus full neighbors", but it is not the most directly supported operational verification evidence for this precise case: A new higher-priority router joins a stable OSPF broadcast segment. the best answer here is: DR changes only as defined by normal election or controlled topology events.

D:

That option concerns RSVP LSP signaling. OSPF broadcast networks elect DR and BDR; priority influences election, and a zero-priority node is ineligible.

Service Provider Routing and Switching, Specialist (JNCIS-SP) (JN0-364) Practice Tests