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Juniper JN0-364 Practice Test 18

Question 170

A Junos service-provider engineer is reviewing this operational case: An operator wants higher preference for an uncongested link in the IS-IS core. What specific configuration or diagnostic action BEST implements the intended response? Select ONE best answer.

  1. Inspect which router is the DIS for the relevant level
  2. Adjust approved IS-IS interface metrics for the correct level
  3. Configure the BGP neighbor with the correct peer AS and reachable endpoint
  4. Review hello counters, interface levels, NET area and authentication

Explanation

Correct Answer

B:

Adjust approved IS-IS interface metrics for the correct level is the best implementation and troubleshooting step for this Junos service-provider case: An operator wants higher preference for an uncongested link in the IS-IS core. Technical basis: Wide-metric style provides extended cost support; route selection depends on SPF link costs.

Incorrect Answers

A:

That option concerns IS-IS LAN DIS election. Wide-metric style provides extended cost support; route selection depends on SPF link costs.

C:

That option concerns BGP TCP session and AS negotiation. Wide-metric style provides extended cost support; route selection depends on SPF link costs.

D:

Review hello counters, interface levels, NET area and authentication is relevant to the different engineering topic "IS-IS hello adjacency negotiation", but it is not the most directly supported implementation and troubleshooting step for this precise case: An operator wants higher preference for an uncongested link in the IS-IS core. the best answer here is: Adjust approved IS-IS interface metrics for the correct level.

Question 171

A Junos service-provider engineer is reviewing this operational case: An operator wants higher preference for an uncongested link in the IS-IS core. Which observation would MOST RELIABLY verify the intended outcome? Select ONE best answer.

  1. Traffic exits using the translated tag required by the remote segment
  2. The intended adjacency restores while authentication stays enforced
  3. The computed route uses the intended least-cost path
  4. Only the approved network appears in the branch Level-1 routing view

Explanation

Correct Answer

C:

The computed route uses the intended least-cost path is the best operational verification evidence for this Junos service-provider case: An operator wants higher preference for an uncongested link in the IS-IS core. Technical basis: Wide-metric style provides extended cost support; route selection depends on SPF link costs.

Incorrect Answers

A:

That option concerns VLAN translation distinction. Wide-metric style provides extended cost support; route selection depends on SPF link costs.

B:

That option concerns IS-IS authentication checks. Wide-metric style provides extended cost support; route selection depends on SPF link costs.

D:

Only the approved network appears in the branch Level-1 routing view is relevant to the different engineering topic "IS-IS leaking between levels", but it is not the most directly supported operational verification evidence for this precise case: An operator wants higher preference for an uncongested link in the IS-IS core. the best answer here is: The computed route uses the intended least-cost path.

Question 172

A provider network team identifies this situation: A new low-bandwidth backup link becomes the active IS-IS path. 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. Assign distinct valid ISO NET addresses with the intended area and system identifiers for Junos IS-IS
  3. Use supported wide IS-IS metrics to reflect link cost and network design at the correct level
  4. Use the IS-IS overload bit to discourage unwanted transit through a router during constrained operation

Explanation

Correct Answer

C:

Use supported wide IS-IS metrics to reflect link cost and network design at the correct level is the best technical design or decision for this Junos service-provider case: A new low-bandwidth backup link becomes the active IS-IS path. Technical basis: Wide-metric style provides extended cost support; route selection depends on SPF link costs.

Incorrect Answers

A:

That option concerns OSPF DR/BDR priority election. Wide-metric style provides extended cost support; route selection depends on SPF link costs.

B:

Assign distinct valid ISO NET addresses with the intended area and system identifiers for Junos IS-IS is relevant to the different engineering topic "IS-IS NET addressing", but it is not the most directly supported technical design or decision for this precise case: A new low-bandwidth backup link becomes the active IS-IS path. the best answer here is: Use supported wide IS-IS metrics to reflect link cost and network design at the correct level.

D:

Use the IS-IS overload bit to discourage unwanted transit through a router during constrained operation is relevant to the different engineering topic "IS-IS overload bit maintenance", but it is not the most directly supported technical design or decision for this precise case: A new low-bandwidth backup link becomes the active IS-IS path. the best answer here is: Use supported wide IS-IS metrics to reflect link cost and network design at the correct level.

Question 173

A provider network team identifies this situation: A new low-bandwidth backup link becomes the active IS-IS path. Which implementation or troubleshooting step is MOST APPROPRIATE here? Choose ONE best answer.

  1. Check incoming and outgoing label operations for the LSP
  2. Compare wide metrics and circuit-level configuration
  3. Configure suitable Level-1-only behavior for the agreed design
  4. Use the expected area portion of its NET and supported level settings

Explanation

Correct Answer

B:

Compare wide metrics and circuit-level configuration is the best implementation and troubleshooting step for this Junos service-provider case: A new low-bandwidth backup link becomes the active IS-IS path. Technical basis: Wide-metric style provides extended cost support; route selection depends on SPF link costs.

Incorrect Answers

A:

That option concerns MPLS push swap pop forwarding. Wide-metric style provides extended cost support; route selection depends on SPF link costs.

C:

That option concerns IS-IS Level-1/Level-2 reachability. Wide-metric style provides extended cost support; route selection depends on SPF link costs.

D:

Use the expected area portion of its NET and supported level settings is relevant to the different engineering topic "IS-IS NET addressing", but it is not the most directly supported implementation and troubleshooting step for this precise case: A new low-bandwidth backup link becomes the active IS-IS path. the best answer here is: Compare wide metrics and circuit-level configuration.

Question 174

A provider network team identifies this situation: A new low-bandwidth backup link becomes the active IS-IS path. What verification evidence MOST CLEARLY demonstrates the solution is working? Choose ONE best answer.

  1. Hello PDUs are exchanged and adjacency reaches Up
  2. Only the intended VLAN's root and port roles change
  3. The SPF decision matches the approved link cost plan
  4. Normal eligible transit paths resume once the overload condition clears

Explanation

Correct Answer

C:

The SPF decision matches the approved link cost plan is the best operational verification evidence for this Junos service-provider case: A new low-bandwidth backup link becomes the active IS-IS path. Technical basis: Wide-metric style provides extended cost support; route selection depends on SPF link costs.

Incorrect Answers

A:

Hello PDUs are exchanged and adjacency reaches Up is relevant to the different engineering topic "IS-IS hello adjacency negotiation", but it is not the most directly supported operational verification evidence for this precise case: A new low-bandwidth backup link becomes the active IS-IS path. the best answer here is: The SPF decision matches the approved link cost plan.

B:

That option concerns VSTP per-VLAN tree behavior. Wide-metric style provides extended cost support; route selection depends on SPF link costs.

D:

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: A new low-bandwidth backup link becomes the active IS-IS path. the best answer here is: The SPF decision matches the approved link cost plan.

Question 175

A Junos service-provider engineer is reviewing this operational case: A newly restarted router needs time to populate forwarding state. Which technical approach MOST DIRECTLY addresses the issue? Select ONE best answer.

  1. Use the IS-IS overload bit to discourage unwanted transit through a router during constrained operation
  2. Advertise IPv6 prefixes using supported IS-IS IPv6 address-family capability and TLVs
  3. Interpret IS-IS TLVs as typed data for advertised topology, protocol reachability and capabilities
  4. Plan Level-1 area-local adjacency versus Level-2 interarea transit correctly

Explanation

Correct Answer

A:

Use the IS-IS overload bit to discourage unwanted transit through a router during constrained operation is the best technical design or decision for this Junos service-provider case: A newly restarted router needs time to populate forwarding state. Technical basis: An overloaded IS-IS router can remain reachable while other routers avoid it as a transit path.

Incorrect Answers

B:

Advertise IPv6 prefixes using supported IS-IS IPv6 address-family capability and TLVs is relevant to the different engineering topic "IS-IS IPv6 reachability", but it is not the most directly supported technical design or decision for this precise case: A newly restarted router needs time to populate forwarding state. the best answer here is: Use the IS-IS overload bit to discourage unwanted transit through a router during constrained operation.

C:

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 newly restarted router needs time to populate forwarding state. the best answer here is: Use the IS-IS overload bit to discourage unwanted transit through a router during constrained operation.

D:

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 newly restarted router needs time to populate forwarding state. the best answer here is: Use the IS-IS overload bit to discourage unwanted transit through a router during constrained operation.

Question 176

A Junos service-provider engineer is reviewing this operational case: A newly restarted router needs time to populate forwarding state. What specific configuration or diagnostic action BEST implements the intended response? Select ONE best answer.

  1. Inspect the appropriate address-family reachability TLVs in LSPs
  2. Inspect the FEC and relevant label mappings for each destination
  3. Use supported overload behavior during its protected startup period
  4. Adjust approved IS-IS interface metrics for the correct level

Explanation

Correct Answer

C:

Use supported overload behavior during its protected startup period is the best implementation and troubleshooting step for this Junos service-provider case: A newly restarted router needs time to populate forwarding state. Technical basis: An overloaded IS-IS router can remain reachable while other routers avoid it as a transit path.

Incorrect Answers

A:

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: A newly restarted router needs time to populate forwarding state. the best answer here is: Use supported overload behavior during its protected startup period.

B:

That option concerns MPLS forwarding-equivalence classes. An overloaded IS-IS router can remain reachable while other routers avoid it as a transit path.

D:

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: A newly restarted router needs time to populate forwarding state. the best answer here is: Use supported overload behavior during its protected startup period.

Question 177

A Junos service-provider engineer is reviewing this operational case: A newly restarted router needs time to populate forwarding state. Which observation would MOST RELIABLY verify the intended outcome? Select ONE best answer.

  1. The network prefix appears in the appropriate LSP and becomes eligible for route calculation
  2. Both eligible member links appear active in show lacp interfaces
  3. The intended IPv6 route information is present and eligible for SPF
  4. Transit traffic avoids it while routing state becomes ready

Explanation

Correct Answer

D:

Transit traffic avoids it while routing state becomes ready is the best operational verification evidence for this Junos service-provider case: A newly restarted router needs time to populate forwarding state. Technical basis: An overloaded IS-IS router can remain reachable while other routers avoid it as a transit path.

Incorrect Answers

A:

The network prefix appears in the appropriate LSP and becomes eligible for route calculation is relevant to the different engineering topic "IS-IS link-state database", but it is not the most directly supported operational verification evidence for this precise case: A newly restarted router needs time to populate forwarding state. the best answer here is: Transit traffic avoids it while routing state becomes ready.

B:

That option concerns LAG and LACP negotiation. An overloaded IS-IS router can remain reachable while other routers avoid it as a transit path.

C:

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: A newly restarted router needs time to populate forwarding state. the best answer here is: Transit traffic avoids it while routing state becomes ready.

Question 178

A provider network team identifies this situation: A core router continues advertising overload after maintenance completes. Which engineering decision BEST fits the stated requirement? Choose ONE best answer.

  1. Match IS-IS authentication configuration on participating interfaces and levels
  2. Verify inet6 route installation and forwarding state separately from IPv4 RIB routes
  3. Use the IS-IS overload bit to discourage unwanted transit through a router during constrained operation
  4. Apply controlled route advertisement between Level-1 and Level-2 areas instead of relying on blanket reachability

Explanation

Correct Answer

C:

Use the IS-IS overload bit to discourage unwanted transit through a router during constrained operation is the best technical design or decision for this Junos service-provider case: A core router continues advertising overload after maintenance completes. Technical basis: An overloaded IS-IS router can remain reachable while other routers avoid it as a transit path.

Incorrect Answers

A:

Match IS-IS authentication configuration on participating interfaces and levels is relevant to the different engineering topic "IS-IS authentication checks", but it is not the most directly supported technical design or decision for this precise case: A core router continues advertising overload after maintenance completes. the best answer here is: Use the IS-IS overload bit to discourage unwanted transit through a router during constrained operation.

B:

That option concerns IPv6 RIB versus FIB verification. An overloaded IS-IS router can remain reachable while other routers avoid it as a transit path.

D:

That option concerns IS-IS leaking between levels. An overloaded IS-IS router can remain reachable while other routers avoid it as a transit path.

Question 179

A provider network team identifies this situation: A core router continues advertising overload after maintenance completes. Which implementation or troubleshooting step is MOST APPROPRIATE here? Choose ONE best answer.

  1. Compare wide metrics and circuit-level configuration
  2. Inspect supported capability TLVs in neighbor LSPs
  3. Review overload configuration and operational state
  4. Review ABR and backbone reachability before changing interface metrics

Explanation

Correct Answer

C:

Review overload configuration and operational state is the best implementation and troubleshooting step for this Junos service-provider case: A core router continues advertising overload after maintenance completes. Technical basis: An overloaded IS-IS router can remain reachable while other routers avoid it as a transit path.

Incorrect Answers

A:

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: A core router continues advertising overload after maintenance completes. the best answer here is: Review overload configuration and operational state.

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 router continues advertising overload after maintenance completes. the best answer here is: Review overload configuration and operational state.

D:

That option concerns OSPF backbone membership. An overloaded IS-IS router can remain reachable while other routers avoid it as a transit path.

Question 180

A provider network team identifies this situation: A core router continues advertising overload after maintenance completes. What verification evidence MOST CLEARLY demonstrates the solution is working? Choose ONE best answer.

  1. Normal eligible transit paths resume once the overload condition clears
  2. The pseudonode reflects the selected DIS after the topology stabilizes
  3. Forwarding changes according to configured path preference rather than random distribution
  4. Its routing remains area-local without an unintended Level-2 transit role

Explanation

Correct Answer

A:

Normal eligible transit paths resume once the overload condition clears is the best operational verification evidence for this Junos service-provider case: A core router continues advertising overload after maintenance completes. Technical basis: An overloaded IS-IS router can remain reachable while other routers avoid it as a transit path.

Incorrect Answers

B:

That option concerns IS-IS LAN DIS election. An overloaded IS-IS router can remain reachable while other routers avoid it as a transit path.

C:

That option concerns Qualified-next-hop selection. An overloaded IS-IS router can remain reachable while other routers avoid it as a transit path.

D:

Its routing remains area-local without an unintended Level-2 transit role is relevant to the different engineering topic "IS-IS Level-1/Level-2 reachability", but it is not the most directly supported operational verification evidence for this precise case: A core router continues advertising overload after maintenance completes. the best answer here is: Normal eligible transit paths resume once the overload condition clears.

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