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Juniper JN0-364 Practice Test 16

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.

Question 151

A Junos service-provider engineer is reviewing this operational case: Two routers sharing a circuit show IS-IS adjacency Down. Which technical approach MOST DIRECTLY addresses the issue? Select ONE best answer.

  1. Check IS-IS IIH hello compatibility and supported level settings when neighbors fail
  2. Differentiate RSVP signaling state failure from underlying IGP reachability
  3. Plan Level-1 area-local adjacency versus Level-2 interarea transit correctly
  4. Match IS-IS authentication configuration on participating interfaces and levels

Explanation

Correct Answer

A:

Check IS-IS IIH hello compatibility and supported level settings when neighbors fail is the best technical design or decision for this Junos service-provider case: Two routers sharing a circuit show IS-IS adjacency Down. Technical basis: IS-IS forms adjacencies through interface hellos whose area, circuit and authentication settings must be compatible.

Incorrect Answers

B:

That option concerns RSVP session and state troubleshooting. IS-IS forms adjacencies through interface hellos whose area, circuit and authentication settings must be compatible.

C:

That option concerns IS-IS Level-1/Level-2 reachability. IS-IS forms adjacencies through interface hellos whose area, circuit and authentication settings must be compatible.

D:

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: Two routers sharing a circuit show IS-IS adjacency Down. the best answer here is: Check IS-IS IIH hello compatibility and supported level settings when neighbors fail.

Question 152

A Junos service-provider engineer is reviewing this operational case: Two routers sharing a circuit show IS-IS adjacency Down. What specific configuration or diagnostic action BEST implements the intended response? Select ONE best answer.

  1. Review hello counters, interface levels, NET area and authentication
  2. Use supported overload behavior during its protected startup period
  3. Configure supported controlled Level-2-to-Level-1 route leaking as appropriate
  4. Build a precise match and a supported routing-instance action with a safe fall-through

Explanation

Correct Answer

A:

Review hello counters, interface levels, NET area and authentication is the best implementation and troubleshooting step for this Junos service-provider case: Two routers sharing a circuit show IS-IS adjacency Down. Technical basis: IS-IS forms adjacencies through interface hellos whose area, circuit and authentication settings must be compatible.

Incorrect Answers

B:

Use supported overload behavior during its protected startup period 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: Two routers sharing a circuit show IS-IS adjacency Down. the best answer here is: Review hello counters, interface levels, NET area and authentication.

C:

That option concerns IS-IS leaking between levels. IS-IS forms adjacencies through interface hellos whose area, circuit and authentication settings must be compatible.

D:

That option concerns Filter-based forwarding. IS-IS forms adjacencies through interface hellos whose area, circuit and authentication settings must be compatible.

Question 153

A Junos service-provider engineer is reviewing this operational case: Two routers sharing a circuit show IS-IS adjacency Down. Which observation would MOST RELIABLY verify the intended outcome? Select ONE best answer.

  1. The computed route uses the intended least-cost path
  2. Only selected eligible routes appear in both target routing tables
  3. Both neighbors report the expected Up adjacency level
  4. Transit traffic avoids it while routing state becomes ready

Explanation

Correct Answer

C:

Both neighbors report the expected Up adjacency level is the best operational verification evidence for this Junos service-provider case: Two routers sharing a circuit show IS-IS adjacency Down. Technical basis: IS-IS forms adjacencies through interface hellos whose area, circuit and authentication settings must be compatible.

Incorrect Answers

A:

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 routers sharing a circuit show IS-IS adjacency Down. the best answer here is: Both neighbors report the expected Up adjacency level.

B:

That option concerns RIB-group route sharing. IS-IS forms adjacencies through interface hellos whose area, circuit and authentication settings must be compatible.

D:

Transit traffic avoids it while routing state becomes ready 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: Two routers sharing a circuit show IS-IS adjacency Down. the best answer here is: Both neighbors report the expected Up adjacency level.

Question 154

A provider network team identifies this situation: A new transit port carries IPv4 routing but no IS-IS control packets. Which engineering decision BEST fits the stated requirement? Choose ONE best answer.

  1. Match the OSPF interface type to the actual link and intended neighbor model
  2. Assign distinct valid ISO NET addresses with the intended area and system identifiers for Junos IS-IS
  3. Verify LSP origination and flooding before assuming an IS-IS prefix is eligible for SPF
  4. Check IS-IS IIH hello compatibility and supported level settings when neighbors fail

Explanation

Correct Answer

D:

Check IS-IS IIH hello compatibility and supported level settings when neighbors fail is the best technical design or decision for this Junos service-provider case: A new transit port carries IPv4 routing but no IS-IS control packets. Technical basis: IS-IS forms adjacencies through interface hellos whose area, circuit and authentication settings must be compatible.

Incorrect Answers

A:

That option concerns OSPF interface network type. IS-IS forms adjacencies through interface hellos whose area, circuit and authentication settings must be compatible.

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 transit port carries IPv4 routing but no IS-IS control packets. the best answer here is: Check IS-IS IIH hello compatibility and supported level settings when neighbors fail.

C:

Verify LSP origination and flooding before assuming an IS-IS prefix is eligible for SPF is relevant to the different engineering topic "IS-IS link-state database", but it is not the most directly supported technical design or decision for this precise case: A new transit port carries IPv4 routing but no IS-IS control packets. the best answer here is: Check IS-IS IIH hello compatibility and supported level settings when neighbors fail.

Question 155

A provider network team identifies this situation: A new transit port carries IPv4 routing but no IS-IS control packets. Which implementation or troubleshooting step is MOST APPROPRIATE here? Choose ONE best answer.

  1. Enable IS-IS on the appropriate interface and check transport-level behavior
  2. Inspect level-specific authentication and rejection counters
  3. Check next-hop resolution and interface availability for the correct inet6 table
  4. Inspect LSP sequence, remaining lifetime and refresh state

Explanation

Correct Answer

A:

Enable IS-IS on the appropriate interface and check transport-level behavior is the best implementation and troubleshooting step for this Junos service-provider case: A new transit port carries IPv4 routing but no IS-IS control packets. Technical basis: IS-IS forms adjacencies through interface hellos whose area, circuit and authentication settings must be compatible.

Incorrect Answers

B:

Inspect level-specific authentication and rejection counters 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: A new transit port carries IPv4 routing but no IS-IS control packets. the best answer here is: Enable IS-IS on the appropriate interface and check transport-level behavior.

C:

That option concerns IPv6 static route next hop. IS-IS forms adjacencies through interface hellos whose area, circuit and authentication settings must be compatible.

D:

Inspect LSP sequence, remaining lifetime and refresh state is relevant to the different engineering topic "IS-IS link-state database", but it is not the most directly supported implementation and troubleshooting step for this precise case: A new transit port carries IPv4 routing but no IS-IS control packets. the best answer here is: Enable IS-IS on the appropriate interface and check transport-level behavior.

Question 156

A provider network team identifies this situation: A new transit port carries IPv4 routing but no IS-IS control packets. 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 IPv6 prefixes are exchanged after correction
  3. Normal eligible transit paths resume once the overload condition clears
  4. Only actual advertised capability is reported, without assuming universal feature support

Explanation

Correct Answer

A:

Hello PDUs are exchanged and adjacency reaches Up is the best operational verification evidence for this Junos service-provider case: A new transit port carries IPv4 routing but no IS-IS control packets. Technical basis: IS-IS forms adjacencies through interface hellos whose area, circuit and authentication settings must be compatible.

Incorrect Answers

B:

That option concerns BGP IPv6 unicast family. IS-IS forms adjacencies through interface hellos whose area, circuit and authentication settings must be compatible.

C:

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 transit port carries IPv4 routing but no IS-IS control packets. the best answer here is: Hello PDUs are exchanged and adjacency reaches Up.

D:

That option concerns IS-IS TLV reachability advertisements. IS-IS forms adjacencies through interface hellos whose area, circuit and authentication settings must be compatible.

Question 157

A Junos service-provider engineer is reviewing this operational case: An IPv6 prefix is absent even though the IS-IS adjacency is Up. Which technical approach MOST DIRECTLY addresses the issue? Select ONE best answer.

  1. Filter and modify received BGP routes with explicit import policy terms
  2. Interpret IS-IS TLVs as typed data for advertised topology, protocol reachability and capabilities
  3. Verify LSP origination and flooding before assuming an IS-IS prefix is eligible for SPF
  4. Plan Level-1 area-local adjacency versus Level-2 interarea transit correctly

Explanation

Correct Answer

B:

Interpret IS-IS TLVs as typed data for advertised topology, protocol reachability and capabilities is the best technical design or decision for this Junos service-provider case: An IPv6 prefix is absent even though the IS-IS adjacency is Up. Technical basis: IS-IS TLVs carry extensible protocol information rather than being ordinary IPv4 header options.

Incorrect Answers

A:

That option concerns BGP inbound routing policy. IS-IS TLVs carry extensible protocol information rather than being ordinary IPv4 header options.

C:

Verify LSP origination and flooding before assuming an IS-IS prefix is eligible for SPF is relevant to the different engineering topic "IS-IS link-state database", but it is not the most directly supported technical design or decision for this precise case: An IPv6 prefix is absent even though the IS-IS adjacency is Up. the best answer here is: Interpret IS-IS TLVs as typed data for advertised topology, protocol reachability and capabilities.

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: An IPv6 prefix is absent even though the IS-IS adjacency is Up. the best answer here is: Interpret IS-IS TLVs as typed data for advertised topology, protocol reachability and capabilities.

Question 158

A Junos service-provider engineer is reviewing this operational case: An IPv6 prefix is absent even though the IS-IS adjacency is Up. What specific configuration or diagnostic action BEST implements the intended response? Select ONE best answer.

  1. Inspect roles and path costs across both uplinks
  2. Inspect the appropriate address-family reachability TLVs in LSPs
  3. Inspect which router is the DIS for the relevant level
  4. Use supported overload behavior during its protected startup period

Explanation

Correct Answer

B:

Inspect the appropriate address-family reachability TLVs in LSPs is the best implementation and troubleshooting step for this Junos service-provider case: An IPv6 prefix is absent even though the IS-IS adjacency is Up. Technical basis: IS-IS TLVs carry extensible protocol information rather than being ordinary IPv4 header options.

Incorrect Answers

A:

That option concerns STP root and designated port roles. IS-IS TLVs carry extensible protocol information rather than being ordinary IPv4 header options.

C:

That option concerns IS-IS LAN DIS election. IS-IS TLVs carry extensible protocol information rather than being ordinary IPv4 header options.

D:

That option concerns IS-IS overload bit maintenance. IS-IS TLVs carry extensible protocol information rather than being ordinary IPv4 header options.

Question 159

A Junos service-provider engineer is reviewing this operational case: An IPv6 prefix is absent even though the IS-IS adjacency is Up. Which observation would MOST RELIABLY verify the intended outcome? Select ONE best answer.

  1. The unauthorized bridge cannot create a loop through the edge
  2. The network prefix appears in the appropriate LSP and becomes eligible for route calculation
  3. The intended IPv6 route information is present and eligible for SPF
  4. The link-state database identifies both routers separately

Explanation

Correct Answer

C:

The intended IPv6 route information is present and eligible for SPF is the best operational verification evidence for this Junos service-provider case: An IPv6 prefix is absent even though the IS-IS adjacency is Up. Technical basis: IS-IS TLVs carry extensible protocol information rather than being ordinary IPv4 header options.

Incorrect Answers

A:

That option concerns BPDU protection for edge ports. IS-IS TLVs carry extensible protocol information rather than being ordinary IPv4 header options.

B:

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: An IPv6 prefix is absent even though the IS-IS adjacency is Up. the best answer here is: The intended IPv6 route information is present and eligible for SPF.

D:

The link-state database identifies both routers separately is relevant to the different engineering topic "IS-IS NET addressing", but it is not the most directly supported operational verification evidence for this precise case: An IPv6 prefix is absent even though the IS-IS adjacency is Up. the best answer here is: The intended IPv6 route information is present and eligible for SPF.

Question 160

A provider network team identifies this situation: A segment-routing-capability audit requires checking advertised node attributes. Which engineering decision BEST fits the stated requirement? Choose ONE best answer.

  1. Interpret IS-IS TLVs as typed data for advertised topology, protocol reachability and capabilities
  2. Check martian address policy before assuming every prefix is eligible to enter the routing table
  3. Use supported wide IS-IS metrics to reflect link cost and network design at the correct level
  4. Plan Level-1 area-local adjacency versus Level-2 interarea transit correctly

Explanation

Correct Answer

A:

Interpret IS-IS TLVs as typed data for advertised topology, protocol reachability and capabilities is the best technical design or decision for this Junos service-provider case: A segment-routing-capability audit requires checking advertised node attributes. Technical basis: IS-IS TLVs carry extensible protocol information rather than being ordinary IPv4 header options.

Incorrect Answers

B:

That option concerns Martian-prefix handling. IS-IS TLVs carry extensible protocol information rather than being ordinary IPv4 header options.

C:

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: A segment-routing-capability audit requires checking advertised node attributes. the best answer here is: Interpret IS-IS TLVs as typed data for advertised topology, protocol reachability and capabilities.

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 segment-routing-capability audit requires checking advertised node attributes. the best answer here is: Interpret IS-IS TLVs as typed data for advertised topology, protocol reachability and capabilities.

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