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Exam Code: JN0-650

Exam Name: Enterprise Routing and Switching, Professional (JNCIP-ENT)

Certification Provider: Juniper

Corresponding Certification: JNCIP-ENT

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Juniper JN0-650 Practice Test 24

Question 230

A Junos network engineer takes this step: Place the critical reject policy before the permissive acceptance rule or refactor matching. Which outcome most directly follows?

  1. The BGP advertisement decision begins using the configured routing policy.
  2. The external peer does not receive the prohibited internal networks from that policy.
  3. Evaluation reaches the security restriction before a terminating accept action.
  4. BGP advertisements to the ISP are constrained to the permitted external prefix.

Explanation

Correct Answer

C:

This is the direct result of the BGP policy-chain order decision: Evaluation reaches the security restriction before a terminating accept action.

Incorrect Answers

A:

This outcome is associated with BGP policy placement (Apply the correct policy to the intended BGP group or neighbor export statement.), not the specified action.

B:

This outcome is associated with BGP route leak prevention (Add an explicit export reject for the prohibited internal prefix range before a broad allow rule.), not the specified action.

D:

This outcome is associated with Selective BGP export (Configure an export policy that explicitly accepts the approved aggregate and rejects all other routes.), not the specified action.

Question 231

Two BGP export policies are chained, but an early accept stops evaluation before the intended security reject. A colleague instead suggests: Apply the correct policy to the intended BGP group or neighbor export statement. Which corrective approach most directly addresses the original issue?

  1. Apply the correct policy to the intended BGP group or neighbor export statement.
  2. Add an explicit export reject for the prohibited internal prefix range before a broad allow rule.
  3. Configure an export policy that explicitly accepts the approved aggregate and rejects all other routes.
  4. Place the critical reject policy before the permissive acceptance rule or refactor matching.

Explanation

Correct Answer

D:

This corrective choice addresses BGP policy-chain order. Evaluation reaches the security restriction before a terminating accept action.

Incorrect Answers

A:

That alternative applies to BGP policy placement instead. The BGP advertisement decision begins using the configured routing policy.

B:

That alternative applies to BGP route leak prevention instead. The external peer does not receive the prohibited internal networks from that policy.

C:

That alternative applies to Selective BGP export instead. BGP advertisements to the ISP are constrained to the permitted external prefix.

Question 232

An enterprise network designer recommends: Place the critical reject policy before the permissive acceptance rule or refactor matching. Which situation most clearly calls for this action?

  1. Two BGP export policies are chained, but an early accept stops evaluation before the intended security reject.
  2. A border router has private lab routes that must never be propagated to an external BGP neighbor.
  3. Only a specified enterprise public aggregate should be advertised to the ISP, not internal interface or lab prefixes.
  4. An export policy is defined under policy-options but no BGP group or neighbor references it.

Explanation

Correct Answer

A:

This case requires the BGP policy-chain order action. Evaluation reaches the security restriction before a terminating accept action.

Incorrect Answers

B:

This other case would be better matched to Add an explicit export reject for the prohibited internal prefix range before a broad allow rule. The external peer does not receive the prohibited internal networks from that policy.

C:

This other case would be better matched to Configure an export policy that explicitly accepts the approved aggregate and rejects all other routes. BGP advertisements to the ISP are constrained to the permitted external prefix.

D:

This other case would be better matched to Apply the correct policy to the intended BGP group or neighbor export statement. The BGP advertisement decision begins using the configured routing policy.

Question 233

A peering router has approved contributing routes but lacks the planned aggregate route to export. Which Junos networking action or protocol decision best addresses this requirement?

  1. Match the community in an import policy and set the desired local-preference action.
  2. Apply a BGP import policy with a precise route-filter reject for the unwanted prefixes.
  3. Create the required aggregate route and match it in the BGP export policy.
  4. Use a route-filter match type that selects only the intended exact /24 prefix.

Explanation

Correct Answer

C:

This action addresses BGP aggregate origination. The selected aggregate can be eligible for advertisement instead of leaking components.

Incorrect Answers

A:

That action targets Community import matching: Tagged paths receive the policy-selected ranking inside the local AS. It does not directly resolve the stated BGP aggregate origination requirement.

B:

That action targets BGP import prefix filter: The rejected BGP paths are not accepted into the intended local routing information base. It does not directly resolve the stated BGP aggregate origination requirement.

D:

That action targets BGP exact prefix match: The policy can exclude nested more-specific routes that should not be announced. It does not directly resolve the stated BGP aggregate origination requirement.

Question 234

A Junos network engineer takes this step: Create the required aggregate route and match it in the BGP export policy. Which outcome most directly follows?

  1. Tagged paths receive the policy-selected ranking inside the local AS.
  2. The policy can exclude nested more-specific routes that should not be announced.
  3. The rejected BGP paths are not accepted into the intended local routing information base.
  4. The selected aggregate can be eligible for advertisement instead of leaking components.

Explanation

Correct Answer

D:

This is the direct result of the BGP aggregate origination decision: The selected aggregate can be eligible for advertisement instead of leaking components.

Incorrect Answers

A:

This outcome is associated with Community import matching (Match the community in an import policy and set the desired local-preference action.), not the specified action.

B:

This outcome is associated with BGP exact prefix match (Use a route-filter match type that selects only the intended exact /24 prefix.), not the specified action.

C:

This outcome is associated with BGP import prefix filter (Apply a BGP import policy with a precise route-filter reject for the unwanted prefixes.), not the specified action.

Question 235

A peering router has approved contributing routes but lacks the planned aggregate route to export. A colleague instead suggests: Apply a BGP import policy with a precise route-filter reject for the unwanted prefixes. Which corrective approach most directly addresses the original issue?

  1. Create the required aggregate route and match it in the BGP export policy.
  2. Match the community in an import policy and set the desired local-preference action.
  3. Use a route-filter match type that selects only the intended exact /24 prefix.
  4. Apply a BGP import policy with a precise route-filter reject for the unwanted prefixes.

Explanation

Correct Answer

A:

This corrective choice addresses BGP aggregate origination. The selected aggregate can be eligible for advertisement instead of leaking components.

Incorrect Answers

B:

That alternative applies to Community import matching instead. Tagged paths receive the policy-selected ranking inside the local AS.

C:

That alternative applies to BGP exact prefix match instead. The policy can exclude nested more-specific routes that should not be announced.

D:

That alternative applies to BGP import prefix filter instead. The rejected BGP paths are not accepted into the intended local routing information base.

Question 236

An enterprise network designer recommends: Create the required aggregate route and match it in the BGP export policy. Which situation most clearly calls for this action?

  1. A peer inadvertently sends unauthorized more-specific routes and the enterprise must reject them at BGP import.
  2. A peering router has approved contributing routes but lacks the planned aggregate route to export.
  3. Routes bearing a particular BGP community should receive a lower local preference when they arrive.
  4. A team intends to export only a single /24 and accidentally permits longer more-specific prefixes with an overly broad rule.

Explanation

Correct Answer

B:

This case requires the BGP aggregate origination action. The selected aggregate can be eligible for advertisement instead of leaking components.

Incorrect Answers

A:

This other case would be better matched to Apply a BGP import policy with a precise route-filter reject for the unwanted prefixes. The rejected BGP paths are not accepted into the intended local routing information base.

C:

This other case would be better matched to Match the community in an import policy and set the desired local-preference action. Tagged paths receive the policy-selected ranking inside the local AS.

D:

This other case would be better matched to Use a route-filter match type that selects only the intended exact /24 prefix. The policy can exclude nested more-specific routes that should not be announced.

Question 237

An export policy is defined under policy-options but no BGP group or neighbor references it. Which Junos networking action or protocol decision best addresses this requirement?

  1. Configure an export policy that explicitly accepts the approved aggregate and rejects all other routes.
  2. Add an explicit export reject for the prohibited internal prefix range before a broad allow rule.
  3. Place the critical reject policy before the permissive acceptance rule or refactor matching.
  4. Apply the correct policy to the intended BGP group or neighbor export statement.

Explanation

Correct Answer

D:

This action addresses BGP policy placement. The BGP advertisement decision begins using the configured routing policy.

Incorrect Answers

A:

That action targets Selective BGP export: BGP advertisements to the ISP are constrained to the permitted external prefix. It does not directly resolve the stated BGP policy placement requirement.

B:

That action targets BGP route leak prevention: The external peer does not receive the prohibited internal networks from that policy. It does not directly resolve the stated BGP policy placement requirement.

C:

That action targets BGP policy-chain order: Evaluation reaches the security restriction before a terminating accept action. It does not directly resolve the stated BGP policy placement requirement.

Question 238

A Junos network engineer takes this step: Apply the correct policy to the intended BGP group or neighbor export statement. Which outcome most directly follows?

  1. The BGP advertisement decision begins using the configured routing policy.
  2. The external peer does not receive the prohibited internal networks from that policy.
  3. Evaluation reaches the security restriction before a terminating accept action.
  4. BGP advertisements to the ISP are constrained to the permitted external prefix.

Explanation

Correct Answer

A:

This is the direct result of the BGP policy placement decision: The BGP advertisement decision begins using the configured routing policy.

Incorrect Answers

B:

This outcome is associated with BGP route leak prevention (Add an explicit export reject for the prohibited internal prefix range before a broad allow rule.), not the specified action.

C:

This outcome is associated with BGP policy-chain order (Place the critical reject policy before the permissive acceptance rule or refactor matching.), not the specified action.

D:

This outcome is associated with Selective BGP export (Configure an export policy that explicitly accepts the approved aggregate and rejects all other routes.), not the specified action.

Question 239

An export policy is defined under policy-options but no BGP group or neighbor references it. A colleague instead suggests: Configure an export policy that explicitly accepts the approved aggregate and rejects all other routes. Which corrective approach most directly addresses the original issue?

  1. Place the critical reject policy before the permissive acceptance rule or refactor matching.
  2. Apply the correct policy to the intended BGP group or neighbor export statement.
  3. Configure an export policy that explicitly accepts the approved aggregate and rejects all other routes.
  4. Add an explicit export reject for the prohibited internal prefix range before a broad allow rule.

Explanation

Correct Answer

B:

This corrective choice addresses BGP policy placement. The BGP advertisement decision begins using the configured routing policy.

Incorrect Answers

A:

That alternative applies to BGP policy-chain order instead. Evaluation reaches the security restriction before a terminating accept action.

C:

That alternative applies to Selective BGP export instead. BGP advertisements to the ISP are constrained to the permitted external prefix.

D:

That alternative applies to BGP route leak prevention instead. The external peer does not receive the prohibited internal networks from that policy.

Question 240

An enterprise network designer recommends: Apply the correct policy to the intended BGP group or neighbor export statement. Which situation most clearly calls for this action?

  1. Only a specified enterprise public aggregate should be advertised to the ISP, not internal interface or lab prefixes.
  2. A border router has private lab routes that must never be propagated to an external BGP neighbor.
  3. An export policy is defined under policy-options but no BGP group or neighbor references it.
  4. Two BGP export policies are chained, but an early accept stops evaluation before the intended security reject.

Explanation

Correct Answer

C:

This case requires the BGP policy placement action. The BGP advertisement decision begins using the configured routing policy.

Incorrect Answers

A:

This other case would be better matched to Configure an export policy that explicitly accepts the approved aggregate and rejects all other routes. BGP advertisements to the ISP are constrained to the permitted external prefix.

B:

This other case would be better matched to Add an explicit export reject for the prohibited internal prefix range before a broad allow rule. The external peer does not receive the prohibited internal networks from that policy.

D:

This other case would be better matched to Place the critical reject policy before the permissive acceptance rule or refactor matching. Evaluation reaches the security restriction before a terminating accept action.

Enterprise Routing and Switching, Professional (JNCIP-ENT) (JN0-650) Practice Tests