Juniper JN0-364 Practice Test 11
Question 100
A provider network team identifies this situation: A prefix is not learned although both ends have a Full adjacency. Which engineering decision BEST fits the stated requirement? Choose ONE best answer.
- Use LSA exchange and database views to distinguish neighbor formation from link-state synchronization
- Match the OSPF interface type to the actual link and intended neighbor model
- Enable permitted 802.1Q VLAN tags on a trunk only for intended tenant broadcast domains
- Recognize a type-two Network LSA generated for an appropriate transit multi-access OSPF network
Explanation
Correct Answer
A:Use LSA exchange and database views to distinguish neighbor formation from link-state synchronization is the best technical design or decision for this Junos service-provider case: A prefix is not learned although both ends have a Full adjacency. Technical basis: OSPF neighbors exchange database descriptions and LSAs before computing consistent SPF state.
Incorrect Answers
B:Match the OSPF interface type to the actual link and intended neighbor model is relevant to the different engineering topic "OSPF interface network type", but it is not the most directly supported technical design or decision for this precise case: A prefix is not learned although both ends have a Full adjacency. the best answer here is: Use LSA exchange and database views to distinguish neighbor formation from link-state synchronization.
C:That option concerns Trunk tagging and VLAN allowlist. OSPF neighbors exchange database descriptions and LSAs before computing consistent SPF state.
D:Recognize a type-two Network LSA generated for an appropriate transit multi-access OSPF network is relevant to the different engineering topic "Network-LSA type-two interpretation", but it is not the most directly supported technical design or decision for this precise case: A prefix is not learned although both ends have a Full adjacency. the best answer here is: Use LSA exchange and database views to distinguish neighbor formation from link-state synchronization.
Question 101
A provider network team identifies this situation: A prefix is not learned although both ends have a Full adjacency. Which implementation or troubleshooting step is MOST APPROPRIATE here? Choose ONE best answer.
- Check election and network-LSA refresh activity
- Review the LSDB for the advertisement before changing forwarding entries
- Inspect configured ID and process restart requirements
- Compare VLAN-to-port mapping and underlying physical connectivity
Explanation
Correct Answer
B:Review the LSDB for the advertisement before changing forwarding entries is the best implementation and troubleshooting step for this Junos service-provider case: A prefix is not learned although both ends have a Full adjacency. Technical basis: OSPF neighbors exchange database descriptions and LSAs before computing consistent SPF state.
Incorrect Answers
A:Check election and network-LSA refresh activity is relevant to the different engineering topic "Network-LSA type-two interpretation", but it is not the most directly supported implementation and troubleshooting step for this precise case: A prefix is not learned although both ends have a Full adjacency. the best answer here is: Review the LSDB for the advertisement before changing forwarding entries.
C:Inspect configured ID and process restart requirements is relevant to the different engineering topic "OSPF router-ID uniqueness", but it is not the most directly supported implementation and troubleshooting step for this precise case: A prefix is not learned although both ends have a Full adjacency. the best answer here is: Review the LSDB for the advertisement before changing forwarding entries.
D:That option concerns Junos VLAN operational validation. OSPF neighbors exchange database descriptions and LSAs before computing consistent SPF state.
Question 102
A provider network team identifies this situation: A prefix is not learned although both ends have a Full adjacency. What verification evidence MOST CLEARLY demonstrates the solution is working? Choose ONE best answer.
- The segment elects appropriate DR/BDR participants and adjacent relationships
- The problem is narrowed to origination, flooding or policy rather than basic adjacency
- Operational OSPF state reflects the intended stable identifier
- The active table contains a resolvable path for authorized prefixes
Explanation
Correct Answer
B:The problem is narrowed to origination, flooding or policy rather than basic adjacency is the best operational verification evidence for this Junos service-provider case: A prefix is not learned although both ends have a Full adjacency. Technical basis: OSPF neighbors exchange database descriptions and LSAs before computing consistent SPF state.
Incorrect Answers
A:The segment elects appropriate DR/BDR participants and adjacent relationships is relevant to the different engineering topic "OSPF interface network type", but it is not the most directly supported operational verification evidence for this precise case: A prefix is not learned although both ends have a Full adjacency. the best answer here is: The problem is narrowed to origination, flooding or policy rather than basic adjacency.
C:Operational OSPF state reflects the intended stable identifier is relevant to the different engineering topic "OSPF router-ID uniqueness", but it is not the most directly supported operational verification evidence for this precise case: A prefix is not learned although both ends have a Full adjacency. the best answer here is: The problem is narrowed to origination, flooding or policy rather than basic adjacency.
D:That option concerns BGP next-hop reachability. OSPF neighbors exchange database descriptions and LSAs before computing consistent SPF state.
Question 103
A Junos service-provider engineer is reviewing this operational case: A backbone LSDB must identify which links a specific router advertises. Which technical approach MOST DIRECTLY addresses the issue? Select ONE best answer.
- Use OSPF neighbor, interface, database and route views to localize control-plane or policy failures
- Use loop protection on an appropriate STP port to avoid unsafe forwarding when expected BPDUs disappear
- Recognize a type-two Network LSA generated for an appropriate transit multi-access OSPF network
- Interpret type-one Router LSAs as router-local link information scoped to an OSPF area
Explanation
Correct Answer
D:Interpret type-one Router LSAs as router-local link information scoped to an OSPF area is the best technical design or decision for this Junos service-provider case: A backbone LSDB must identify which links a specific router advertises. Technical basis: Type-one LSAs describe a router's links in an area and are flooded within that area.
Incorrect Answers
A:That option concerns OSPF operational troubleshooting. Type-one LSAs describe a router's links in an area and are flooded within that area.
B:That option concerns Loop protection when BPDUs vanish. Type-one LSAs describe a router's links in an area and are flooded within that area.
C:Recognize a type-two Network LSA generated for an appropriate transit multi-access OSPF network is relevant to the different engineering topic "Network-LSA type-two interpretation", but it is not the most directly supported technical design or decision for this precise case: A backbone LSDB must identify which links a specific router advertises. the best answer here is: Interpret type-one Router LSAs as router-local link information scoped to an OSPF area.
Question 104
A Junos service-provider engineer is reviewing this operational case: A backbone LSDB must identify which links a specific router advertises. What specific configuration or diagnostic action BEST implements the intended response? Select ONE best answer.
- Check the network LSA originator and attached router list
- Inspect the corresponding router LSA in that area database
- Configure a supported GRE tunnel and ensure proper underlay endpoints
- Select and configure distinct persistent router IDs
Explanation
Correct Answer
B:Inspect the corresponding router LSA in that area database is the best implementation and troubleshooting step for this Junos service-provider case: A backbone LSDB must identify which links a specific router advertises. Technical basis: Type-one LSAs describe a router's links in an area and are flooded within that area.
Incorrect Answers
A:Check the network LSA originator and attached router list is relevant to the different engineering topic "Network-LSA type-two interpretation", but it is not the most directly supported implementation and troubleshooting step for this precise case: A backbone LSDB must identify which links a specific router advertises. the best answer here is: Inspect the corresponding router LSA in that area database.
C:That option concerns GRE encapsulation purpose. Type-one LSAs describe a router's links in an area and are flooded within that area.
D:That option concerns OSPF router-ID uniqueness. Type-one LSAs describe a router's links in an area and are flooded within that area.
Question 105
A Junos service-provider engineer is reviewing this operational case: A backbone LSDB must identify which links a specific router advertises. Which observation would MOST RELIABLY verify the intended outcome? Select ONE best answer.
- The host resolves the intended router's link-layer address
- The core neighbor becomes adjacent and the expected OSPF prefixes appear
- The advertised links match the router's area-local topology
- The prefix is originated but no loopback adjacency is expected
Explanation
Correct Answer
C:The advertised links match the router's area-local topology is the best operational verification evidence for this Junos service-provider case: A backbone LSDB must identify which links a specific router advertises. Technical basis: Type-one LSAs describe a router's links in an area and are flooded within that area.
Incorrect Answers
A:That option concerns IPv6 neighbor discovery. Type-one LSAs describe a router's links in an area and are flooded within that area.
B:The core neighbor becomes adjacent and the expected OSPF prefixes appear is relevant to the different engineering topic "OSPF backbone membership", but it is not the most directly supported operational verification evidence for this precise case: A backbone LSDB must identify which links a specific router advertises. the best answer here is: The advertised links match the router's area-local topology.
D:The prefix is originated but no loopback adjacency is expected is relevant to the different engineering topic "OSPF passive-interface and export policy", but it is not the most directly supported operational verification evidence for this precise case: A backbone LSDB must identify which links a specific router advertises. the best answer here is: The advertised links match the router's area-local topology.
Question 106
A provider network team identifies this situation: A link cost change is not reflected in the expected area topology. Which engineering decision BEST fits the stated requirement? Choose ONE best answer.
- Advertise intended connected prefixes without forming unwanted OSPF neighbors on customer-facing interfaces
- Interpret the 2Way and Full states according to OSPF network type and DR roles
- Verify LSP origination and flooding before assuming an IS-IS prefix is eligible for SPF
- Interpret type-one Router LSAs as router-local link information scoped to an OSPF area
Explanation
Correct Answer
D:Interpret type-one Router LSAs as router-local link information scoped to an OSPF area is the best technical design or decision for this Junos service-provider case: A link cost change is not reflected in the expected area topology. Technical basis: Type-one LSAs describe a router's links in an area and are flooded within that area.
Incorrect Answers
A:Advertise intended connected prefixes without forming unwanted OSPF neighbors on customer-facing interfaces is relevant to the different engineering topic "OSPF passive-interface and export policy", but it is not the most directly supported technical design or decision for this precise case: A link cost change is not reflected in the expected area topology. the best answer here is: Interpret type-one Router LSAs as router-local link information scoped to an OSPF area.
B:Interpret the 2Way and Full states according to OSPF network type and DR roles is relevant to the different engineering topic "OSPF two-way versus full neighbors", but it is not the most directly supported technical design or decision for this precise case: A link cost change is not reflected in the expected area topology. the best answer here is: Interpret type-one Router LSAs as router-local link information scoped to an OSPF area.
C:That option concerns IS-IS link-state database. Type-one LSAs describe a router's links in an area and are flooded within that area.
Question 107
A provider network team identifies this situation: A link cost change is not reflected in the expected area topology. Which implementation or troubleshooting step is MOST APPROPRIATE here? Choose ONE best answer.
- Align timer configuration under controlled change on both ends
- Use appropriate broadcast network settings and inspect elected roles
- Check the originating router's LSA and sequence/state
- Inspect preference and active forwarding next-hop selection
Explanation
Correct Answer
C:Check the originating router's LSA and sequence/state is the best implementation and troubleshooting step for this Junos service-provider case: A link cost change is not reflected in the expected area topology. Technical basis: Type-one LSAs describe a router's links in an area and are flooded within that area.
Incorrect Answers
A:That option concerns OSPF hello/dead agreement. Type-one LSAs describe a router's links in an area and are flooded within that area.
B:That option concerns OSPF interface network type. Type-one LSAs describe a router's links in an area and are flooded within that area.
D:That option concerns Qualified-next-hop selection. Type-one LSAs describe a router's links in an area and are flooded within that area.
Question 108
A provider network team identifies this situation: A link cost change is not reflected in the expected area topology. What verification evidence MOST CLEARLY demonstrates the solution is working? Choose ONE best answer.
- Only actual advertised capability is reported, without assuming universal feature support
- Area connectivity and interarea reachability match the agreed topology
- The area-local Router LSA reflects the updated link metrics
- The adjacency reaches Full after resolving the actual mismatch
Explanation
Correct Answer
C:The area-local Router LSA reflects the updated link metrics is the best operational verification evidence for this Junos service-provider case: A link cost change is not reflected in the expected area topology. Technical basis: Type-one LSAs describe a router's links in an area and are flooded within that area.
Incorrect Answers
A:That option concerns IS-IS TLV reachability advertisements. Type-one LSAs describe a router's links in an area and are flooded within that area.
B:Area connectivity and interarea reachability match the agreed topology is relevant to the different engineering topic "OSPF backbone membership", but it is not the most directly supported operational verification evidence for this precise case: A link cost change is not reflected in the expected area topology. the best answer here is: The area-local Router LSA reflects the updated link metrics.
D:The adjacency reaches Full after resolving the actual mismatch is relevant to the different engineering topic "OSPF two-way versus full neighbors", but it is not the most directly supported operational verification evidence for this precise case: A link cost change is not reflected in the expected area topology. the best answer here is: The area-local Router LSA reflects the updated link metrics.
Question 109
A Junos service-provider engineer is reviewing this operational case: A provider transit VLAN has a DR and multiple attached routers. Which technical approach MOST DIRECTLY addresses the issue? Select ONE best answer.
- Interpret the 2Way and Full states according to OSPF network type and DR roles
- Interpret type-one Router LSAs as router-local link information scoped to an OSPF area
- Recognize a type-two Network LSA generated for an appropriate transit multi-access OSPF network
- Use GRE to carry supported network payload protocols across a reachable IP underlay
Explanation
Correct Answer
C:Recognize a type-two Network LSA generated for an appropriate transit multi-access OSPF network is the best technical design or decision for this Junos service-provider case: A provider transit VLAN has a DR and multiple attached routers. Technical basis: The DR represents attached routers in a network LSA, whereas point-to-point topologies do not require one.
Incorrect Answers
A:That option concerns OSPF two-way versus full neighbors. The DR represents attached routers in a network LSA, whereas point-to-point topologies do not require one.
B:That option concerns Router-LSA type-one interpretation. The DR represents attached routers in a network LSA, whereas point-to-point topologies do not require one.
D:That option concerns GRE encapsulation purpose. The DR represents attached routers in a network LSA, whereas point-to-point topologies do not require one.
Question 110
A Junos service-provider engineer is reviewing this operational case: A provider transit VLAN has a DR and multiple attached routers. What specific configuration or diagnostic action BEST implements the intended response? Select ONE best answer.
- Assign supported OSPF costs reflecting approved routing intent
- Check the network LSA originator and attached router list
- Review tunnel MTU and supported PMTUD handling
- Select and configure distinct persistent router IDs
Explanation
Correct Answer
B:Check the network LSA originator and attached router list is the best implementation and troubleshooting step for this Junos service-provider case: A provider transit VLAN has a DR and multiple attached routers. Technical basis: The DR represents attached routers in a network LSA, whereas point-to-point topologies do not require one.
Incorrect Answers
A:Assign supported OSPF costs reflecting approved routing intent is relevant to the different engineering topic "OSPF interface metric selection", but it is not the most directly supported implementation and troubleshooting step for this precise case: A provider transit VLAN has a DR and multiple attached routers. the best answer here is: Check the network LSA originator and attached router list.
C:That option concerns GRE MTU and encapsulation overhead. The DR represents attached routers in a network LSA, whereas point-to-point topologies do not require one.
D:Select and configure distinct persistent router IDs is relevant to the different engineering topic "OSPF router-ID uniqueness", but it is not the most directly supported implementation and troubleshooting step for this precise case: A provider transit VLAN has a DR and multiple attached routers. the best answer here is: Check the network LSA originator and attached router list.