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Exam Code: JN0-650

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

Certification Provider: Juniper

Corresponding Certification: JNCIP-ENT

Questions & Answers

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Juniper JN0-650 Practice Test 11

Question 100

An enterprise network designer recommends: Move the specific reject policy term before the broad accept term. Which situation most clearly calls for this action?

  1. An OSPF LSA for a destination is present, but the installed prefix uses a static route instead.
  2. A named Junos policy-statement correctly matches a route but its effects are absent because it was never attached to any OSPF process.
  3. A Junos edge router has a static route that must appear in OSPF but is not redistributed by default.
  4. A Junos routing policy has a broad accept term before a more specific deny term, so an unwanted route matches the first term.

Explanation

Correct Answer

D:

This case requires the Policy term evaluation action. The rejected prefix can be stopped before policy evaluation reaches the general acceptance rule.

Incorrect Answers

A:

This other case would be better matched to Inspect routing-table active-route preference and competing protocol entries. The engineer can distinguish protocol topology learning from forwarding-route selection by preference.

B:

This other case would be better matched to Reference the policy from the intended OSPF export or import hierarchy according to its purpose. The policy begins controlling the applicable OSPF route exchange direction.

C:

This other case would be better matched to Create a Junos policy matching the selected static route and apply it as OSPF export. Only accepted static route candidates are eligible for external OSPF advertisement.

Question 101

Only two approved static application networks, not every static network, may be redistributed into enterprise OSPF. Which Junos networking action or protocol decision best addresses this requirement?

  1. Apply an OSPF import policy that rejects the unwanted external route for local installation.
  2. Create a Junos policy matching the selected static route and apply it as OSPF export.
  3. Use precise route-filter terms with accept and an explicit default reject in the OSPF export policy.
  4. Inspect routing-table active-route preference and competing protocol entries.

Explanation

Correct Answer

C:

This action addresses OSPF selective redistribution. Advertising external reachability can be limited to the enumerated prefixes.

Incorrect Answers

A:

That action targets OSPF external import restriction: Local external route installation can be suppressed while the link-state database remains unchanged. It does not directly resolve the stated OSPF selective redistribution requirement.

B:

That action targets Static OSPF export: Only accepted static route candidates are eligible for external OSPF advertisement. It does not directly resolve the stated OSPF selective redistribution requirement.

D:

That action targets OSPF route visibility troubleshooting: The engineer can distinguish protocol topology learning from forwarding-route selection by preference. It does not directly resolve the stated OSPF selective redistribution requirement.

Question 102

A Junos network engineer takes this step: Use precise route-filter terms with accept and an explicit default reject in the OSPF export policy. Which outcome most directly follows?

  1. Local external route installation can be suppressed while the link-state database remains unchanged.
  2. Only accepted static route candidates are eligible for external OSPF advertisement.
  3. The engineer can distinguish protocol topology learning from forwarding-route selection by preference.
  4. Advertising external reachability can be limited to the enumerated prefixes.

Explanation

Correct Answer

D:

This is the direct result of the OSPF selective redistribution decision: Advertising external reachability can be limited to the enumerated prefixes.

Incorrect Answers

A:

This outcome is associated with OSPF external import restriction (Apply an OSPF import policy that rejects the unwanted external route for local installation.), not the specified action.

B:

This outcome is associated with Static OSPF export (Create a Junos policy matching the selected static route and apply it as OSPF export.), not the specified action.

C:

This outcome is associated with OSPF route visibility troubleshooting (Inspect routing-table active-route preference and competing protocol entries.), not the specified action.

Question 103

Only two approved static application networks, not every static network, may be redistributed into enterprise OSPF. A colleague instead suggests: Inspect routing-table active-route preference and competing protocol entries. Which corrective approach most directly addresses the original issue?

  1. Use precise route-filter terms with accept and an explicit default reject in the OSPF export policy.
  2. Inspect routing-table active-route preference and competing protocol entries.
  3. Apply an OSPF import policy that rejects the unwanted external route for local installation.
  4. Create a Junos policy matching the selected static route and apply it as OSPF export.

Explanation

Correct Answer

A:

This corrective choice addresses OSPF selective redistribution. Advertising external reachability can be limited to the enumerated prefixes.

Incorrect Answers

B:

That alternative applies to OSPF route visibility troubleshooting instead. The engineer can distinguish protocol topology learning from forwarding-route selection by preference.

C:

That alternative applies to OSPF external import restriction instead. Local external route installation can be suppressed while the link-state database remains unchanged.

D:

That alternative applies to Static OSPF export instead. Only accepted static route candidates are eligible for external OSPF advertisement.

Question 104

An enterprise network designer recommends: Use precise route-filter terms with accept and an explicit default reject in the OSPF export policy. Which situation most clearly calls for this action?

  1. An OSPF LSA for a destination is present, but the installed prefix uses a static route instead.
  2. Only two approved static application networks, not every static network, may be redistributed into enterprise OSPF.
  3. A network must prevent an unwanted OSPF external prefix from entering one Junos routing table without altering its originating LSA flood.
  4. A Junos edge router has a static route that must appear in OSPF but is not redistributed by default.

Explanation

Correct Answer

B:

This case requires the OSPF selective redistribution action. Advertising external reachability can be limited to the enumerated prefixes.

Incorrect Answers

A:

This other case would be better matched to Inspect routing-table active-route preference and competing protocol entries. The engineer can distinguish protocol topology learning from forwarding-route selection by preference.

C:

This other case would be better matched to Apply an OSPF import policy that rejects the unwanted external route for local installation. Local external route installation can be suppressed while the link-state database remains unchanged.

D:

This other case would be better matched to Create a Junos policy matching the selected static route and apply it as OSPF export. Only accepted static route candidates are eligible for external OSPF advertisement.

Question 105

A named Junos policy-statement correctly matches a route but its effects are absent because it was never attached to any OSPF process. Which Junos networking action or protocol decision best addresses this requirement?

  1. Apply an OSPF import policy that rejects the unwanted external route for local installation.
  2. Create a Junos policy matching the selected static route and apply it as OSPF export.
  3. Move the specific reject policy term before the broad accept term.
  4. Reference the policy from the intended OSPF export or import hierarchy according to its purpose.

Explanation

Correct Answer

D:

This action addresses OSPF policy attachment. The policy begins controlling the applicable OSPF route exchange direction.

Incorrect Answers

A:

That action targets OSPF external import restriction: Local external route installation can be suppressed while the link-state database remains unchanged. It does not directly resolve the stated OSPF policy attachment requirement.

B:

That action targets Static OSPF export: Only accepted static route candidates are eligible for external OSPF advertisement. It does not directly resolve the stated OSPF policy attachment requirement.

C:

That action targets Policy term evaluation: The rejected prefix can be stopped before policy evaluation reaches the general acceptance rule. It does not directly resolve the stated OSPF policy attachment requirement.

Question 106

A Junos network engineer takes this step: Reference the policy from the intended OSPF export or import hierarchy according to its purpose. Which outcome most directly follows?

  1. The policy begins controlling the applicable OSPF route exchange direction.
  2. The rejected prefix can be stopped before policy evaluation reaches the general acceptance rule.
  3. Local external route installation can be suppressed while the link-state database remains unchanged.
  4. Only accepted static route candidates are eligible for external OSPF advertisement.

Explanation

Correct Answer

A:

This is the direct result of the OSPF policy attachment decision: The policy begins controlling the applicable OSPF route exchange direction.

Incorrect Answers

B:

This outcome is associated with Policy term evaluation (Move the specific reject policy term before the broad accept term.), not the specified action.

C:

This outcome is associated with OSPF external import restriction (Apply an OSPF import policy that rejects the unwanted external route for local installation.), not the specified action.

D:

This outcome is associated with Static OSPF export (Create a Junos policy matching the selected static route and apply it as OSPF export.), not the specified action.

Question 107

A named Junos policy-statement correctly matches a route but its effects are absent because it was never attached to any OSPF process. A colleague instead suggests: Create a Junos policy matching the selected static route and apply it as OSPF export. Which corrective approach most directly addresses the original issue?

  1. Apply an OSPF import policy that rejects the unwanted external route for local installation.
  2. Reference the policy from the intended OSPF export or import hierarchy according to its purpose.
  3. Create a Junos policy matching the selected static route and apply it as OSPF export.
  4. Move the specific reject policy term before the broad accept term.

Explanation

Correct Answer

B:

This corrective choice addresses OSPF policy attachment. The policy begins controlling the applicable OSPF route exchange direction.

Incorrect Answers

A:

That alternative applies to OSPF external import restriction instead. Local external route installation can be suppressed while the link-state database remains unchanged.

C:

That alternative applies to Static OSPF export instead. Only accepted static route candidates are eligible for external OSPF advertisement.

D:

That alternative applies to Policy term evaluation instead. The rejected prefix can be stopped before policy evaluation reaches the general acceptance rule.

Question 108

An enterprise network designer recommends: Reference the policy from the intended OSPF export or import hierarchy according to its purpose. Which situation most clearly calls for this action?

  1. A Junos routing policy has a broad accept term before a more specific deny term, so an unwanted route matches the first term.
  2. A network must prevent an unwanted OSPF external prefix from entering one Junos routing table without altering its originating LSA flood.
  3. A named Junos policy-statement correctly matches a route but its effects are absent because it was never attached to any OSPF process.
  4. A Junos edge router has a static route that must appear in OSPF but is not redistributed by default.

Explanation

Correct Answer

C:

This case requires the OSPF policy attachment action. The policy begins controlling the applicable OSPF route exchange direction.

Incorrect Answers

A:

This other case would be better matched to Move the specific reject policy term before the broad accept term. The rejected prefix can be stopped before policy evaluation reaches the general acceptance rule.

B:

This other case would be better matched to Apply an OSPF import policy that rejects the unwanted external route for local installation. Local external route installation can be suppressed while the link-state database remains unchanged.

D:

This other case would be better matched to Create a Junos policy matching the selected static route and apply it as OSPF export. Only accepted static route candidates are eligible for external OSPF advertisement.

Question 109

An OSPF LSA for a destination is present, but the installed prefix uses a static route instead. Which Junos networking action or protocol decision best addresses this requirement?

  1. Use precise route-filter terms with accept and an explicit default reject in the OSPF export policy.
  2. Move the specific reject policy term before the broad accept term.
  3. Apply an OSPF import policy that rejects the unwanted external route for local installation.
  4. Inspect routing-table active-route preference and competing protocol entries.

Explanation

Correct Answer

D:

This action addresses OSPF route visibility troubleshooting. The engineer can distinguish protocol topology learning from forwarding-route selection by preference.

Incorrect Answers

A:

That action targets OSPF selective redistribution: Advertising external reachability can be limited to the enumerated prefixes. It does not directly resolve the stated OSPF route visibility troubleshooting requirement.

B:

That action targets Policy term evaluation: The rejected prefix can be stopped before policy evaluation reaches the general acceptance rule. It does not directly resolve the stated OSPF route visibility troubleshooting requirement.

C:

That action targets OSPF external import restriction: Local external route installation can be suppressed while the link-state database remains unchanged. It does not directly resolve the stated OSPF route visibility troubleshooting requirement.

Question 110

A Junos network engineer takes this step: Inspect routing-table active-route preference and competing protocol entries. Which outcome most directly follows?

  1. The engineer can distinguish protocol topology learning from forwarding-route selection by preference.
  2. The rejected prefix can be stopped before policy evaluation reaches the general acceptance rule.
  3. Local external route installation can be suppressed while the link-state database remains unchanged.
  4. Advertising external reachability can be limited to the enumerated prefixes.

Explanation

Correct Answer

A:

This is the direct result of the OSPF route visibility troubleshooting decision: The engineer can distinguish protocol topology learning from forwarding-route selection by preference.

Incorrect Answers

B:

This outcome is associated with Policy term evaluation (Move the specific reject policy term before the broad accept term.), not the specified action.

C:

This outcome is associated with OSPF external import restriction (Apply an OSPF import policy that rejects the unwanted external route for local installation.), not the specified action.

D:

This outcome is associated with OSPF selective redistribution (Use precise route-filter terms with accept and an explicit default reject in the OSPF export policy.), not the specified action.

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