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.
- Inspect which router is the DIS for the relevant level
- Adjust approved IS-IS interface metrics for the correct level
- Configure the BGP neighbor with the correct peer AS and reachable endpoint
- 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.
- Traffic exits using the translated tag required by the remote segment
- The intended adjacency restores while authentication stays enforced
- The computed route uses the intended least-cost path
- 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.
- Use interface priority and election behavior correctly when designing an OSPF broadcast segment
- Assign distinct valid ISO NET addresses with the intended area and system identifiers for Junos IS-IS
- Use supported wide IS-IS metrics to reflect link cost and network design at the correct level
- 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.
- Check incoming and outgoing label operations for the LSP
- Compare wide metrics and circuit-level configuration
- Configure suitable Level-1-only behavior for the agreed design
- 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.
- Hello PDUs are exchanged and adjacency reaches Up
- Only the intended VLAN's root and port roles change
- The SPF decision matches the approved link cost plan
- 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.
- Use the IS-IS overload bit to discourage unwanted transit through a router during constrained operation
- Advertise IPv6 prefixes using supported IS-IS IPv6 address-family capability and TLVs
- Interpret IS-IS TLVs as typed data for advertised topology, protocol reachability and capabilities
- 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.
- Inspect the appropriate address-family reachability TLVs in LSPs
- Inspect the FEC and relevant label mappings for each destination
- Use supported overload behavior during its protected startup period
- 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.
- The network prefix appears in the appropriate LSP and becomes eligible for route calculation
- Both eligible member links appear active in show lacp interfaces
- The intended IPv6 route information is present and eligible for SPF
- 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.
- Match IS-IS authentication configuration on participating interfaces and levels
- Verify inet6 route installation and forwarding state separately from IPv4 RIB routes
- Use the IS-IS overload bit to discourage unwanted transit through a router during constrained operation
- 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.
- Compare wide metrics and circuit-level configuration
- Inspect supported capability TLVs in neighbor LSPs
- Review overload configuration and operational state
- 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.
- Normal eligible transit paths resume once the overload condition clears
- The pseudonode reflects the selected DIS after the topology stabilizes
- Forwarding changes according to configured path preference rather than random distribution
- 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.