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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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"Enterprise Routing and Switching, Professional (JNCIP-ENT) Exam", also known as JN0-650 exam, is a Juniper certification exam.

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Juniper JN0-650 Practice Test 22

Question 210

A Junos network engineer takes this step: Apply a BGP import policy with a precise route-filter reject for the unwanted prefixes. Which outcome most directly follows?

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

Explanation

Correct Answer

B:

This is the direct result of the BGP import prefix filter decision: The rejected BGP paths are not accepted into the intended local routing information base.

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.

C:

This outcome is associated with BGP aggregate origination (Create the required aggregate route and match it in the BGP export policy.), not the specified action.

D:

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.

Question 211

A peer inadvertently sends unauthorized more-specific routes and the enterprise must reject them at BGP import. A colleague instead suggests: Match the community in an import policy and set the desired local-preference action. 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. Apply a BGP import policy with a precise route-filter reject for the unwanted prefixes.
  4. Use a route-filter match type that selects only the intended exact /24 prefix.

Explanation

Correct Answer

C:

This corrective choice addresses BGP import prefix filter. The rejected BGP paths are not accepted into the intended local routing information base.

Incorrect Answers

A:

That alternative applies to BGP aggregate origination instead. The selected aggregate can be eligible for advertisement instead of leaking components.

B:

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

D:

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

Question 212

An enterprise network designer recommends: Apply a BGP import policy with a precise route-filter reject for the unwanted prefixes. Which situation most clearly calls for this action?

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

Explanation

Correct Answer

D:

This case requires the BGP import prefix filter action. The rejected BGP paths are not accepted into the intended local routing information base.

Incorrect Answers

A:

This other case would be better matched to Create the required aggregate route and match it in the BGP export policy. The selected aggregate can be eligible for advertisement instead of leaking components.

B:

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.

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.

Question 213

Only a specified enterprise public aggregate should be advertised to the ISP, not internal interface or lab prefixes. 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. Apply the correct policy to the intended BGP group or neighbor export statement.
  4. Place the critical reject policy before the permissive acceptance rule or refactor matching.

Explanation

Correct Answer

A:

This action addresses Selective BGP export. BGP advertisements to the ISP are constrained to the permitted external prefix.

Incorrect Answers

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 Selective BGP export requirement.

C:

That action targets BGP policy placement: The BGP advertisement decision begins using the configured routing policy. It does not directly resolve the stated Selective BGP export requirement.

D:

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

Question 214

A Junos network engineer takes this step: Configure an export policy that explicitly accepts the approved aggregate and rejects all other routes. Which outcome most directly follows?

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

Explanation

Correct Answer

B:

This is the direct result of the Selective BGP export decision: BGP advertisements to the ISP are constrained to the permitted external prefix.

Incorrect Answers

A:

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.

C:

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

Question 215

Only a specified enterprise public aggregate should be advertised to the ISP, not internal interface or lab prefixes. A colleague instead suggests: Add an explicit export reject for the prohibited internal prefix range before a broad allow rule. 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

C:

This corrective choice addresses Selective BGP export. BGP advertisements to the ISP are constrained to the permitted external prefix.

Incorrect Answers

A:

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

B:

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

D:

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

Question 216

An enterprise network designer recommends: Configure an export policy that explicitly accepts the approved aggregate and rejects all other routes. Which situation most clearly calls for this action?

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

Explanation

Correct Answer

D:

This case requires the Selective BGP export action. BGP advertisements to the ISP are constrained to the permitted external prefix.

Incorrect Answers

A:

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.

B:

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.

C:

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.

Question 217

Routes bearing a particular BGP community should receive a lower local preference when they arrive. Which Junos networking action or protocol decision best addresses this requirement?

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

Explanation

Correct Answer

D:

This action addresses Community import matching. Tagged paths receive the policy-selected ranking inside the local AS.

Incorrect Answers

A:

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 Community import matching requirement.

B:

That action targets BGP aggregate origination: The selected aggregate can be eligible for advertisement instead of leaking components. It does not directly resolve the stated Community import matching requirement.

C:

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 Community import matching requirement.

Question 218

A Junos network engineer takes this step: Match the community in an import policy and set the desired local-preference action. 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

A:

This is the direct result of the Community import matching decision: Tagged paths receive the policy-selected ranking inside the local AS.

Incorrect Answers

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.

D:

This outcome is associated with BGP aggregate origination (Create the required aggregate route and match it in the BGP export policy.), not the specified action.

Question 219

Routes bearing a particular BGP community should receive a lower local preference when they arrive. A colleague instead suggests: Use a route-filter match type that selects only the intended exact /24 prefix. Which corrective approach most directly addresses the original issue?

  1. Apply a BGP import policy with a precise route-filter reject for the unwanted prefixes.
  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. Create the required aggregate route and match it in the BGP export policy.

Explanation

Correct Answer

B:

This corrective choice addresses Community import matching. Tagged paths receive the policy-selected ranking inside the local AS.

Incorrect Answers

A:

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

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 aggregate origination instead. The selected aggregate can be eligible for advertisement instead of leaking components.

Question 220

An enterprise network designer recommends: Match the community in an import policy and set the desired local-preference action. Which situation most clearly calls for this action?

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

Explanation

Correct Answer

C:

This case requires the Community import matching action. Tagged paths receive the policy-selected ranking inside the local AS.

Incorrect Answers

A:

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.

B:

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.

D:

This other case would be better matched to Create the required aggregate route and match it in the BGP export policy. The selected aggregate can be eligible for advertisement instead of leaking components.

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