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Juniper JN0-364 Practice Test 15

Question 140

A Junos service-provider engineer is reviewing this operational case: Two neighboring core routers are in different area IDs but must exchange interarea routes. What specific configuration or diagnostic action BEST implements the intended response? Select ONE best answer.

  1. Enable and verify an eligible Level-2 adjacency
  2. Inspect the originating and received IS-IS LSP database entries
  3. Confirm matching authentication parameters without exposing secret material
  4. Inspect show spanning-tree interface role, BPDU state and root identity

Explanation

Correct Answer

A:

Enable and verify an eligible Level-2 adjacency is the best implementation and troubleshooting step for this Junos service-provider case: Two neighboring core routers are in different area IDs but must exchange interarea routes. Technical basis: Level-1 routers form area-local adjacencies, while Level-2 routers can connect areas through the Level-2 topology.

Incorrect Answers

B:

That option concerns IS-IS link-state database. Level-1 routers form area-local adjacencies, while Level-2 routers can connect areas through the Level-2 topology.

C:

Confirm matching authentication parameters without exposing secret material is relevant to the different engineering topic "IS-IS authentication checks", but it is not the most directly supported implementation and troubleshooting step for this precise case: Two neighboring core routers are in different area IDs but must exchange interarea routes. the best answer here is: Enable and verify an eligible Level-2 adjacency.

D:

That option concerns Spanning-tree troubleshooting and edge settings. Level-1 routers form area-local adjacencies, while Level-2 routers can connect areas through the Level-2 topology.

Question 141

A Junos service-provider engineer is reviewing this operational case: Two neighboring core routers are in different area IDs but must exchange interarea routes. Which observation would MOST RELIABLY verify the intended outcome? Select ONE best answer.

  1. The intended adjacency restores while authentication stays enforced
  2. The computed route uses the intended least-cost path
  3. The route client promptly reacts when BFD session Down is confirmed
  4. Their Level-2 adjacency comes Up and the required prefixes become reachable

Explanation

Correct Answer

D:

Their Level-2 adjacency comes Up and the required prefixes become reachable is the best operational verification evidence for this Junos service-provider case: Two neighboring core routers are in different area IDs but must exchange interarea routes. Technical basis: Level-1 routers form area-local adjacencies, while Level-2 routers can connect areas through the Level-2 topology.

Incorrect Answers

A:

The intended adjacency restores while authentication stays enforced is relevant to the different engineering topic "IS-IS authentication checks", but it is not the most directly supported operational verification evidence for this precise case: Two neighboring core routers are in different area IDs but must exchange interarea routes. the best answer here is: Their Level-2 adjacency comes Up and the required prefixes become reachable.

B:

The computed route uses the intended least-cost path is relevant to the different engineering topic "IS-IS wide metrics", but it is not the most directly supported operational verification evidence for this precise case: Two neighboring core routers are in different area IDs but must exchange interarea routes. the best answer here is: Their Level-2 adjacency comes Up and the required prefixes become reachable.

C:

The route client promptly reacts when BFD session Down is confirmed is relevant to the different engineering topic "BFD rapid failure detection", but it is not the most directly supported operational verification evidence for this precise case: Two neighboring core routers are in different area IDs but must exchange interarea routes. the best answer here is: Their Level-2 adjacency comes Up and the required prefixes become reachable.

Question 142

A provider network team identifies this situation: An access node should remain inside one area without acting as transit between areas. Which engineering decision BEST fits the stated requirement? Choose ONE best answer.

  1. Plan Level-1 area-local adjacency versus Level-2 interarea transit correctly
  2. Use supported wide IS-IS metrics to reflect link cost and network design at the correct level
  3. Interpret IS-IS TLVs as typed data for advertised topology, protocol reachability and capabilities
  4. Use the outgoing interface context when resolving a link-local IPv6 next hop

Explanation

Correct Answer

A:

Plan Level-1 area-local adjacency versus Level-2 interarea transit correctly is the best technical design or decision for this Junos service-provider case: An access node should remain inside one area without acting as transit between areas. Technical basis: Level-1 routers form area-local adjacencies, while Level-2 routers can connect areas through the Level-2 topology.

Incorrect Answers

B:

Use supported wide IS-IS metrics to reflect link cost and network design at the correct level is relevant to the different engineering topic "IS-IS wide metrics", but it is not the most directly supported technical design or decision for this precise case: An access node should remain inside one area without acting as transit between areas. the best answer here is: Plan Level-1 area-local adjacency versus Level-2 interarea transit correctly.

C:

That option concerns IS-IS TLV reachability advertisements. Level-1 routers form area-local adjacencies, while Level-2 routers can connect areas through the Level-2 topology.

D:

That option concerns IPv6 link-local next-hop scope. Level-1 routers form area-local adjacencies, while Level-2 routers can connect areas through the Level-2 topology.

Question 143

A provider network team identifies this situation: An access node should remain inside one area without acting as transit between areas. Which implementation or troubleshooting step is MOST APPROPRIATE here? Choose ONE best answer.

  1. Configure suitable Level-1-only behavior for the agreed design
  2. Compare wide metrics and circuit-level configuration
  3. Check negotiated intervals, multiplier, CPU and transport characteristics
  4. Review overload configuration and operational state

Explanation

Correct Answer

A:

Configure suitable Level-1-only behavior for the agreed design is the best implementation and troubleshooting step for this Junos service-provider case: An access node should remain inside one area without acting as transit between areas. Technical basis: Level-1 routers form area-local adjacencies, while Level-2 routers can connect areas through the Level-2 topology.

Incorrect Answers

B:

Compare wide metrics and circuit-level configuration is relevant to the different engineering topic "IS-IS wide metrics", but it is not the most directly supported implementation and troubleshooting step for this precise case: An access node should remain inside one area without acting as transit between areas. the best answer here is: Configure suitable Level-1-only behavior for the agreed design.

C:

Check negotiated intervals, multiplier, CPU and transport characteristics is relevant to the different engineering topic "BFD rapid failure detection", but it is not the most directly supported implementation and troubleshooting step for this precise case: An access node should remain inside one area without acting as transit between areas. the best answer here is: Configure suitable Level-1-only behavior for the agreed design.

D:

Review overload configuration and operational state is relevant to the different engineering topic "IS-IS overload bit maintenance", but it is not the most directly supported implementation and troubleshooting step for this precise case: An access node should remain inside one area without acting as transit between areas. the best answer here is: Configure suitable Level-1-only behavior for the agreed design.

Question 144

A provider network team identifies this situation: An access node should remain inside one area without acting as transit between areas. What verification evidence MOST CLEARLY demonstrates the solution is working? Choose ONE best answer.

  1. The intended prefix is propagated without exposing unrelated private networks
  2. Normal eligible transit paths resume once the overload condition clears
  3. Bidirectional overlay packets are forwarded correctly
  4. Its routing remains area-local without an unintended Level-2 transit role

Explanation

Correct Answer

D:

Its routing remains area-local without an unintended Level-2 transit role is the best operational verification evidence for this Junos service-provider case: An access node should remain inside one area without acting as transit between areas. Technical basis: Level-1 routers form area-local adjacencies, while Level-2 routers can connect areas through the Level-2 topology.

Incorrect Answers

A:

That option concerns IS-IS leaking between levels. Level-1 routers form area-local adjacencies, while Level-2 routers can connect areas through the Level-2 topology.

B:

Normal eligible transit paths resume once the overload condition clears is relevant to the different engineering topic "IS-IS overload bit maintenance", but it is not the most directly supported operational verification evidence for this precise case: An access node should remain inside one area without acting as transit between areas. the best answer here is: Its routing remains area-local without an unintended Level-2 transit role.

C:

That option concerns GRE tunnel forwarding tests. Level-1 routers form area-local adjacencies, while Level-2 routers can connect areas through the Level-2 topology.

Question 145

A Junos service-provider engineer is reviewing this operational case: An IS-IS peer is Up but a newly configured loopback is absent downstream. Which technical approach MOST DIRECTLY addresses the issue? Select ONE best answer.

  1. Understand designated intermediate system election on multi-access IS-IS links
  2. Plan Level-1 area-local adjacency versus Level-2 interarea transit correctly
  3. Verify LSP origination and flooding before assuming an IS-IS prefix is eligible for SPF
  4. Check explicit-path constraints when engineering RSVP LSP routing through particular core hops

Explanation

Correct Answer

C:

Verify LSP origination and flooding before assuming an IS-IS prefix is eligible for SPF is the best technical design or decision for this Junos service-provider case: An IS-IS peer is Up but a newly configured loopback is absent downstream. Technical basis: IS-IS LSPs carry topology information that peers must learn before selecting paths.

Incorrect Answers

A:

Understand designated intermediate system election on multi-access IS-IS links is relevant to the different engineering topic "IS-IS LAN DIS election", but it is not the most directly supported technical design or decision for this precise case: An IS-IS peer is Up but a newly configured loopback is absent downstream. the best answer here is: Verify LSP origination and flooding before assuming an IS-IS prefix is eligible for SPF.

B:

Plan Level-1 area-local adjacency versus Level-2 interarea transit correctly is relevant to the different engineering topic "IS-IS Level-1/Level-2 reachability", but it is not the most directly supported technical design or decision for this precise case: An IS-IS peer is Up but a newly configured loopback is absent downstream. the best answer here is: Verify LSP origination and flooding before assuming an IS-IS prefix is eligible for SPF.

D:

That option concerns RSVP explicit-route constraints. IS-IS LSPs carry topology information that peers must learn before selecting paths.

Question 146

A Junos service-provider engineer is reviewing this operational case: An IS-IS peer is Up but a newly configured loopback is absent downstream. What specific configuration or diagnostic action BEST implements the intended response? Select ONE best answer.

  1. Adjust approved IS-IS interface metrics for the correct level
  2. Inspect the originating and received IS-IS LSP database entries
  3. Check the network LSA originator and attached router list
  4. Inspect the appropriate address-family reachability TLVs in LSPs

Explanation

Correct Answer

B:

Inspect the originating and received IS-IS LSP database entries is the best implementation and troubleshooting step for this Junos service-provider case: An IS-IS peer is Up but a newly configured loopback is absent downstream. Technical basis: IS-IS LSPs carry topology information that peers must learn before selecting paths.

Incorrect Answers

A:

Adjust approved IS-IS interface metrics for the correct level is relevant to the different engineering topic "IS-IS wide metrics", but it is not the most directly supported implementation and troubleshooting step for this precise case: An IS-IS peer is Up but a newly configured loopback is absent downstream. the best answer here is: Inspect the originating and received IS-IS LSP database entries.

C:

That option concerns Network-LSA type-two interpretation. IS-IS LSPs carry topology information that peers must learn before selecting paths.

D:

Inspect the appropriate address-family reachability TLVs in LSPs is relevant to the different engineering topic "IS-IS TLV reachability advertisements", but it is not the most directly supported implementation and troubleshooting step for this precise case: An IS-IS peer is Up but a newly configured loopback is absent downstream. the best answer here is: Inspect the originating and received IS-IS LSP database entries.

Question 147

A Junos service-provider engineer is reviewing this operational case: An IS-IS peer is Up but a newly configured loopback is absent downstream. Which observation would MOST RELIABLY verify the intended outcome? Select ONE best answer.

  1. The intended IPv6 route information is present and eligible for SPF
  2. The alternate path transitions appropriately when the active link fails
  3. The network prefix appears in the appropriate LSP and becomes eligible for route calculation
  4. The intended adjacency restores while authentication stays enforced

Explanation

Correct Answer

C:

The network prefix appears in the appropriate LSP and becomes eligible for route calculation is the best operational verification evidence for this Junos service-provider case: An IS-IS peer is Up but a newly configured loopback is absent downstream. Technical basis: IS-IS LSPs carry topology information that peers must learn before selecting paths.

Incorrect Answers

A:

The intended IPv6 route information is present and eligible for SPF is relevant to the different engineering topic "IS-IS TLV reachability advertisements", but it is not the most directly supported operational verification evidence for this precise case: An IS-IS peer is Up but a newly configured loopback is absent downstream. the best answer here is: The network prefix appears in the appropriate LSP and becomes eligible for route calculation.

B:

That option concerns RSTP rapid transitions. IS-IS LSPs carry topology information that peers must learn before selecting paths.

D:

The intended adjacency restores while authentication stays enforced is relevant to the different engineering topic "IS-IS authentication checks", but it is not the most directly supported operational verification evidence for this precise case: An IS-IS peer is Up but a newly configured loopback is absent downstream. the best answer here is: The network prefix appears in the appropriate LSP and becomes eligible for route calculation.

Question 148

A provider network team identifies this situation: A core route disappears after an LSP age event. Which engineering decision BEST fits the stated requirement? Choose ONE best answer.

  1. Plan Level-1 area-local adjacency versus Level-2 interarea transit correctly
  2. Enable LDP on intended MPLS transport interfaces and verify neighbor discovery
  3. Verify LSP origination and flooding before assuming an IS-IS prefix is eligible for SPF
  4. Interpret IS-IS TLVs as typed data for advertised topology, protocol reachability and capabilities

Explanation

Correct Answer

C:

Verify LSP origination and flooding before assuming an IS-IS prefix is eligible for SPF is the best technical design or decision for this Junos service-provider case: A core route disappears after an LSP age event. Technical basis: IS-IS LSPs carry topology information that peers must learn before selecting paths.

Incorrect Answers

A:

Plan Level-1 area-local adjacency versus Level-2 interarea transit correctly is relevant to the different engineering topic "IS-IS Level-1/Level-2 reachability", but it is not the most directly supported technical design or decision for this precise case: A core route disappears after an LSP age event. the best answer here is: Verify LSP origination and flooding before assuming an IS-IS prefix is eligible for SPF.

B:

That option concerns LDP session discovery. IS-IS LSPs carry topology information that peers must learn before selecting paths.

D:

Interpret IS-IS TLVs as typed data for advertised topology, protocol reachability and capabilities is relevant to the different engineering topic "IS-IS TLV reachability advertisements", but it is not the most directly supported technical design or decision for this precise case: A core route disappears after an LSP age event. the best answer here is: Verify LSP origination and flooding before assuming an IS-IS prefix is eligible for SPF.

Question 149

A provider network team identifies this situation: A core route disappears after an LSP age event. Which implementation or troubleshooting step is MOST APPROPRIATE here? Choose ONE best answer.

  1. Compare the observed labels with configured service encapsulation
  2. Inspect supported capability TLVs in neighbor LSPs
  3. Inspect the Level-1/Level-2 router's advertisement policy and route eligibility
  4. Inspect LSP sequence, remaining lifetime and refresh state

Explanation

Correct Answer

D:

Inspect LSP sequence, remaining lifetime and refresh state is the best implementation and troubleshooting step for this Junos service-provider case: A core route disappears after an LSP age event. Technical basis: IS-IS LSPs carry topology information that peers must learn before selecting paths.

Incorrect Answers

A:

That option concerns MPLS label-stack header. IS-IS LSPs carry topology information that peers must learn before selecting paths.

B:

Inspect supported capability TLVs in neighbor LSPs is relevant to the different engineering topic "IS-IS TLV reachability advertisements", but it is not the most directly supported implementation and troubleshooting step for this precise case: A core route disappears after an LSP age event. the best answer here is: Inspect LSP sequence, remaining lifetime and refresh state.

C:

That option concerns IS-IS leaking between levels. IS-IS LSPs carry topology information that peers must learn before selecting paths.

Question 150

A provider network team identifies this situation: A core route disappears after an LSP age event. What verification evidence MOST CLEARLY demonstrates the solution is working? Choose ONE best answer.

  1. The SPF decision matches the approved link cost plan
  2. The pseudonode reflects the selected DIS after the topology stabilizes
  3. Database convergence restores the intended reachability without stale entries
  4. Unmatched traffic continues through the expected default context

Explanation

Correct Answer

C:

Database convergence restores the intended reachability without stale entries is the best operational verification evidence for this Junos service-provider case: A core route disappears after an LSP age event. Technical basis: IS-IS LSPs carry topology information that peers must learn before selecting paths.

Incorrect Answers

A:

The SPF decision matches the approved link cost plan is relevant to the different engineering topic "IS-IS wide metrics", but it is not the most directly supported operational verification evidence for this precise case: A core route disappears after an LSP age event. the best answer here is: Database convergence restores the intended reachability without stale entries.

B:

The pseudonode reflects the selected DIS after the topology stabilizes is relevant to the different engineering topic "IS-IS LAN DIS election", but it is not the most directly supported operational verification evidence for this precise case: A core route disappears after an LSP age event. the best answer here is: Database convergence restores the intended reachability without stale entries.

D:

That option concerns Filter-based forwarding. IS-IS LSPs carry topology information that peers must learn before selecting paths.

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