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Juniper JN0-364 Practice Test 24

Question 230

A Junos service-provider engineer is reviewing this operational case: Two peers advertise one customer prefix with different local preference and AS path lengths. 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 path attributes and identify the AS loop before accepting updates
  3. Apply explicit BGP export policy matching authorized active routes
  4. Inspect current route candidates and identify the first decisive comparison

Explanation

Correct Answer

D:

Inspect current route candidates and identify the first decisive comparison is the best implementation and troubleshooting step for this Junos service-provider case: Two peers advertise one customer prefix with different local preference and AS path lengths. Technical basis: BGP compares route preference, policy attributes and other path criteria in a defined sequence.

Incorrect Answers

A:

That option concerns STP root and designated port roles. BGP compares route preference, policy attributes and other path criteria in a defined sequence.

B:

Inspect path attributes and identify the AS loop before accepting updates is relevant to the different engineering topic "BGP AS-path loop prevention", but it is not the most directly supported implementation and troubleshooting step for this precise case: Two peers advertise one customer prefix with different local preference and AS path lengths. the best answer here is: Inspect current route candidates and identify the first decisive comparison.

C:

Apply explicit BGP export policy matching authorized active routes is relevant to the different engineering topic "BGP outbound advertisement policy", but it is not the most directly supported implementation and troubleshooting step for this precise case: Two peers advertise one customer prefix with different local preference and AS path lengths. the best answer here is: Inspect current route candidates and identify the first decisive comparison.

Question 231

A Junos service-provider engineer is reviewing this operational case: Two peers advertise one customer prefix with different local preference and AS path lengths. Which observation would MOST RELIABLY verify the intended outcome? Select ONE best answer.

  1. Ingress path selection reflects policy where MED is eligible for comparison
  2. Traffic exits using the translated tag required by the remote segment
  3. The preferred route follows actual ordered policy rules
  4. The looping path is rejected while valid alternatives remain eligible

Explanation

Correct Answer

C:

The preferred route follows actual ordered policy rules is the best operational verification evidence for this Junos service-provider case: Two peers advertise one customer prefix with different local preference and AS path lengths. Technical basis: BGP compares route preference, policy attributes and other path criteria in a defined sequence.

Incorrect Answers

A:

Ingress path selection reflects policy where MED is eligible for comparison is relevant to the different engineering topic "BGP MED and peer comparison", but it is not the most directly supported operational verification evidence for this precise case: Two peers advertise one customer prefix with different local preference and AS path lengths. the best answer here is: The preferred route follows actual ordered policy rules.

B:

That option concerns VLAN translation distinction. BGP compares route preference, policy attributes and other path criteria in a defined sequence.

D:

The looping path is rejected while valid alternatives remain eligible is relevant to the different engineering topic "BGP AS-path loop prevention", but it is not the most directly supported operational verification evidence for this precise case: Two peers advertise one customer prefix with different local preference and AS path lengths. the best answer here is: The preferred route follows actual ordered policy rules.

Question 232

A provider network team identifies this situation: An engineer claims the oldest BGP route must always win. Which engineering decision BEST fits the stated requirement? Choose ONE best answer.

  1. Apply BGP's ordered path-selection criteria rather than selecting routes by one attribute in isolation
  2. Differentiate RSVP signaling state failure from underlying IGP reachability
  3. Use BGP groups to share policy and common parameters while retaining correct peer-specific settings
  4. Interpret AS_PATH as an inter-AS path and loop-prevention signal

Explanation

Correct Answer

A:

Apply BGP's ordered path-selection criteria rather than selecting routes by one attribute in isolation is the best technical design or decision for this Junos service-provider case: An engineer claims the oldest BGP route must always win. Technical basis: BGP compares route preference, policy attributes and other path criteria in a defined sequence.

Incorrect Answers

B:

That option concerns RSVP session and state troubleshooting. BGP compares route preference, policy attributes and other path criteria in a defined sequence.

C:

Use BGP groups to share policy and common parameters while retaining correct peer-specific settings is relevant to the different engineering topic "BGP peer-group policy inheritance", but it is not the most directly supported technical design or decision for this precise case: An engineer claims the oldest BGP route must always win. the best answer here is: Apply BGP's ordered path-selection criteria rather than selecting routes by one attribute in isolation.

D:

Interpret AS_PATH as an inter-AS path and loop-prevention signal is relevant to the different engineering topic "BGP AS-path loop prevention", but it is not the most directly supported technical design or decision for this precise case: An engineer claims the oldest BGP route must always win. the best answer here is: Apply BGP's ordered path-selection criteria rather than selecting routes by one attribute in isolation.

Question 233

A provider network team identifies this situation: An engineer claims the oldest BGP route must always win. Which implementation or troubleshooting step is MOST APPROPRIATE here? Choose ONE best answer.

  1. Inspect bridge-domain membership and VLAN tagging rather than assuming normal flooding crosses VLAN boundaries
  2. Inspect policy and the route selection order before attributing the result to MED
  3. Inspect inherited group settings and peer overrides
  4. Review higher-priority path attributes before any late tie-breakers

Explanation

Correct Answer

D:

Review higher-priority path attributes before any late tie-breakers is the best implementation and troubleshooting step for this Junos service-provider case: An engineer claims the oldest BGP route must always win. Technical basis: BGP compares route preference, policy attributes and other path criteria in a defined sequence.

Incorrect Answers

A:

That option concerns Unknown unicast and flooding. BGP compares route preference, policy attributes and other path criteria in a defined sequence.

B:

Inspect policy and the route selection order before attributing the result to MED is relevant to the different engineering topic "BGP MED and peer comparison", but it is not the most directly supported implementation and troubleshooting step for this precise case: An engineer claims the oldest BGP route must always win. the best answer here is: Review higher-priority path attributes before any late tie-breakers.

C:

Inspect inherited group settings and peer overrides is relevant to the different engineering topic "BGP peer-group policy inheritance", but it is not the most directly supported implementation and troubleshooting step for this precise case: An engineer claims the oldest BGP route must always win. the best answer here is: Review higher-priority path attributes before any late tie-breakers.

Question 234

A provider network team identifies this situation: An engineer claims the oldest BGP route must always win. What verification evidence MOST CLEARLY demonstrates the solution is working? Choose ONE best answer.

  1. Bidirectional overlay packets are forwarded correctly
  2. The diagnostic report avoids unsupported cross-AS MED assumptions
  3. The transport establishes and BGP progresses beyond Active
  4. The chosen route is explained by the earliest relevant selection factor

Explanation

Correct Answer

D:

The chosen route is explained by the earliest relevant selection factor is the best operational verification evidence for this Junos service-provider case: An engineer claims the oldest BGP route must always win. Technical basis: BGP compares route preference, policy attributes and other path criteria in a defined sequence.

Incorrect Answers

A:

That option concerns GRE tunnel forwarding tests. BGP compares route preference, policy attributes and other path criteria in a defined sequence.

B:

The diagnostic report avoids unsupported cross-AS MED assumptions is relevant to the different engineering topic "BGP MED and peer comparison", but it is not the most directly supported operational verification evidence for this precise case: An engineer claims the oldest BGP route must always win. the best answer here is: The chosen route is explained by the earliest relevant selection factor.

C:

The transport establishes and BGP progresses beyond Active is relevant to the different engineering topic "BGP TCP session and AS negotiation", but it is not the most directly supported operational verification evidence for this precise case: An engineer claims the oldest BGP route must always win. the best answer here is: The chosen route is explained by the earliest relevant selection factor.

Question 235

A Junos service-provider engineer is reviewing this operational case: A customer accidentally advertises a provider internal management prefix. Which technical approach MOST DIRECTLY addresses the issue? Select ONE best answer.

  1. Interpret AS_PATH as an inter-AS path and loop-prevention signal
  2. Examine route detail and policy reasons when a valid-looking Junos route is hidden or inactive
  3. Filter and modify received BGP routes with explicit import policy terms
  4. Use local preference to express preferred outbound exit within an AS

Explanation

Correct Answer

C:

Filter and modify received BGP routes with explicit import policy terms is the best technical design or decision for this Junos service-provider case: A customer accidentally advertises a provider internal management prefix. Technical basis: Junos BGP import policies govern acceptance and route attributes before routes become eligible for the local RIB.

Incorrect Answers

A:

Interpret AS_PATH as an inter-AS path and loop-prevention signal is relevant to the different engineering topic "BGP AS-path loop prevention", but it is not the most directly supported technical design or decision for this precise case: A customer accidentally advertises a provider internal management prefix. the best answer here is: Filter and modify received BGP routes with explicit import policy terms.

B:

That option concerns Active-route versus hidden-route triage. Junos BGP import policies govern acceptance and route attributes before routes become eligible for the local RIB.

D:

Use local preference to express preferred outbound exit within an AS is relevant to the different engineering topic "BGP local preference selection", but it is not the most directly supported technical design or decision for this precise case: A customer accidentally advertises a provider internal management prefix. the best answer here is: Filter and modify received BGP routes with explicit import policy terms.

Question 236

A Junos service-provider engineer is reviewing this operational case: A customer accidentally advertises a provider internal management prefix. What specific configuration or diagnostic action BEST implements the intended response? Select ONE best answer.

  1. Inspect import/export policy and UPDATE advertisements
  2. Inspect show route table inet6.0 and IPv6 forwarding context
  3. Check receive-protocol bgp and import policy before investigating forwarding
  4. Use a targeted import policy to reject the unauthorized prefix

Explanation

Correct Answer

D:

Use a targeted import policy to reject the unauthorized prefix is the best implementation and troubleshooting step for this Junos service-provider case: A customer accidentally advertises a provider internal management prefix. Technical basis: Junos BGP import policies govern acceptance and route attributes before routes become eligible for the local RIB.

Incorrect Answers

A:

Inspect import/export policy and UPDATE advertisements is relevant to the different engineering topic "BGP message processing", but it is not the most directly supported implementation and troubleshooting step for this precise case: A customer accidentally advertises a provider internal management prefix. the best answer here is: Use a targeted import policy to reject the unauthorized prefix.

B:

That option concerns IPv6 RIB versus FIB verification. Junos BGP import policies govern acceptance and route attributes before routes become eligible for the local RIB.

C:

Check receive-protocol bgp and import policy before investigating forwarding is relevant to the different engineering topic "BGP route-troubleshooting CLI", but it is not the most directly supported implementation and troubleshooting step for this precise case: A customer accidentally advertises a provider internal management prefix. the best answer here is: Use a targeted import policy to reject the unauthorized prefix.

Question 237

A Junos service-provider engineer is reviewing this operational case: A customer accidentally advertises a provider internal management prefix. Which observation would MOST RELIABLY verify the intended outcome? Select ONE best answer.

  1. Ingress path selection reflects policy where MED is eligible for comparison
  2. The label swap chain remains consistent despite different numeric labels
  3. Only approved customer networks enter BGP candidate routing
  4. The required prefixes reach all authorized iBGP peers

Explanation

Correct Answer

C:

Only approved customer networks enter BGP candidate routing is the best operational verification evidence for this Junos service-provider case: A customer accidentally advertises a provider internal management prefix. Technical basis: Junos BGP import policies govern acceptance and route attributes before routes become eligible for the local RIB.

Incorrect Answers

A:

That option concerns BGP MED and peer comparison. Junos BGP import policies govern acceptance and route attributes before routes become eligible for the local RIB.

B:

That option concerns MPLS label binding and retention. Junos BGP import policies govern acceptance and route attributes before routes become eligible for the local RIB.

D:

The required prefixes reach all authorized iBGP peers is relevant to the different engineering topic "IBGP route propagation constraints", but it is not the most directly supported operational verification evidence for this precise case: A customer accidentally advertises a provider internal management prefix. the best answer here is: Only approved customer networks enter BGP candidate routing.

Question 238

A provider network team identifies this situation: An import policy accidentally rejects a legitimate customer /24. Which engineering decision BEST fits the stated requirement? Choose ONE best answer.

  1. Filter and modify received BGP routes with explicit import policy terms
  2. Interpret OPEN, UPDATE, KEEPALIVE and NOTIFICATION roles during session setup and operation
  3. Enable LDP on intended MPLS transport interfaces and verify neighbor discovery
  4. Use local preference to express preferred outbound exit within an AS

Explanation

Correct Answer

A:

Filter and modify received BGP routes with explicit import policy terms is the best technical design or decision for this Junos service-provider case: An import policy accidentally rejects a legitimate customer /24. Technical basis: Junos BGP import policies govern acceptance and route attributes before routes become eligible for the local RIB.

Incorrect Answers

B:

Interpret OPEN, UPDATE, KEEPALIVE and NOTIFICATION roles during session setup and operation is relevant to the different engineering topic "BGP message processing", but it is not the most directly supported technical design or decision for this precise case: An import policy accidentally rejects a legitimate customer /24. the best answer here is: Filter and modify received BGP routes with explicit import policy terms.

C:

That option concerns LDP session discovery. Junos BGP import policies govern acceptance and route attributes before routes become eligible for the local RIB.

D:

Use local preference to express preferred outbound exit within an AS is relevant to the different engineering topic "BGP local preference selection", but it is not the most directly supported technical design or decision for this precise case: An import policy accidentally rejects a legitimate customer /24. the best answer here is: Filter and modify received BGP routes with explicit import policy terms.

Question 239

A provider network team identifies this situation: An import policy accidentally rejects a legitimate customer /24. Which implementation or troubleshooting step is MOST APPROPRIATE here? Choose ONE best answer.

  1. Compare MTU, network type and DBD negotiation before enabling any workaround
  2. Inspect term order and matching conditions against show route receive-protocol bgp
  3. Compare AS_PATH sequence and local preferences of candidate routes
  4. Inspect local preference and candidate route attributes in the local AS

Explanation

Correct Answer

B:

Inspect term order and matching conditions against show route receive-protocol bgp is the best implementation and troubleshooting step for this Junos service-provider case: An import policy accidentally rejects a legitimate customer /24. Technical basis: Junos BGP import policies govern acceptance and route attributes before routes become eligible for the local RIB.

Incorrect Answers

A:

That option concerns OSPF two-way versus full neighbors. Junos BGP import policies govern acceptance and route attributes before routes become eligible for the local RIB.

C:

Compare AS_PATH sequence and local preferences of candidate routes is relevant to the different engineering topic "BGP AS-path loop prevention", but it is not the most directly supported implementation and troubleshooting step for this precise case: An import policy accidentally rejects a legitimate customer /24. the best answer here is: Inspect term order and matching conditions against show route receive-protocol bgp.

D:

Inspect local preference and candidate route attributes in the local AS is relevant to the different engineering topic "BGP local preference selection", but it is not the most directly supported implementation and troubleshooting step for this precise case: An import policy accidentally rejects a legitimate customer /24. the best answer here is: Inspect term order and matching conditions against show route receive-protocol bgp.

Question 240

A provider network team identifies this situation: An import policy accidentally rejects a legitimate customer /24. What verification evidence MOST CLEARLY demonstrates the solution is working? Choose ONE best answer.

  1. The approved /24 is accepted without opening broad unintended acceptance
  2. The endpoint MAC is learned in the expected VLAN
  3. The unintended default is withdrawn without suppressing required prefixes
  4. Route availability matches the intentional reflection or mesh architecture

Explanation

Correct Answer

A:

The approved /24 is accepted without opening broad unintended acceptance is the best operational verification evidence for this Junos service-provider case: An import policy accidentally rejects a legitimate customer /24. Technical basis: Junos BGP import policies govern acceptance and route attributes before routes become eligible for the local RIB.

Incorrect Answers

B:

That option concerns Access port VLAN membership. Junos BGP import policies govern acceptance and route attributes before routes become eligible for the local RIB.

C:

That option concerns BGP outbound advertisement policy. Junos BGP import policies govern acceptance and route attributes before routes become eligible for the local RIB.

D:

Route availability matches the intentional reflection or mesh architecture is relevant to the different engineering topic "IBGP route propagation constraints", but it is not the most directly supported operational verification evidence for this precise case: An import policy accidentally rejects a legitimate customer /24. the best answer here is: The approved /24 is accepted without opening broad unintended acceptance.

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