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.
- The SPF decision matches the approved link cost plan
- The pseudonode reflects the selected DIS after the topology stabilizes
- Database convergence restores the intended reachability without stale entries
- 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.
- Check IS-IS IIH hello compatibility and supported level settings when neighbors fail
- Differentiate RSVP signaling state failure from underlying IGP reachability
- Plan Level-1 area-local adjacency versus Level-2 interarea transit correctly
- 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.
- Review hello counters, interface levels, NET area and authentication
- Use supported overload behavior during its protected startup period
- Configure supported controlled Level-2-to-Level-1 route leaking as appropriate
- 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.
- The computed route uses the intended least-cost path
- Only selected eligible routes appear in both target routing tables
- Both neighbors report the expected Up adjacency level
- 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.
- Match the OSPF interface type to the actual link and intended neighbor model
- Assign distinct valid ISO NET addresses with the intended area and system identifiers for Junos IS-IS
- Verify LSP origination and flooding before assuming an IS-IS prefix is eligible for SPF
- 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.
- Enable IS-IS on the appropriate interface and check transport-level behavior
- Inspect level-specific authentication and rejection counters
- Check next-hop resolution and interface availability for the correct inet6 table
- 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.
- Hello PDUs are exchanged and adjacency reaches Up
- Only the intended IPv6 prefixes are exchanged after correction
- Normal eligible transit paths resume once the overload condition clears
- 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.
- Filter and modify received BGP routes with explicit import policy terms
- Interpret IS-IS TLVs as typed data for advertised topology, protocol reachability and capabilities
- Verify LSP origination and flooding before assuming an IS-IS prefix is eligible for SPF
- 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.
- Inspect roles and path costs across both uplinks
- Inspect the appropriate address-family reachability TLVs in LSPs
- Inspect which router is the DIS for the relevant level
- 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.
- The unauthorized bridge cannot create a loop through the edge
- The network prefix appears in the appropriate LSP and becomes eligible for route calculation
- The intended IPv6 route information is present and eligible for SPF
- 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.
- Interpret IS-IS TLVs as typed data for advertised topology, protocol reachability and capabilities
- Check martian address policy before assuming every prefix is eligible to enter the routing table
- Use supported wide IS-IS metrics to reflect link cost and network design at the correct level
- 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.