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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 16

Question 150

A Junos network engineer takes this step: Prefer the route with the shorter AS-path length under the normal selection sequence. Which outcome most directly follows?

  1. The ranking evidence can identify the selection criterion behind the chosen path.
  2. The path can participate in valid best-path selection after next-hop resolution.
  3. A route with IGP origin can be preferred over an incomplete-origin path in this tie.
  4. The fewer-AS route can win when earlier selection criteria are equal.

Explanation

Correct Answer

D:

This is the direct result of the Shorter AS path decision: The fewer-AS route can win when earlier selection criteria are equal.

Incorrect Answers

A:

This outcome is associated with BGP selection evidence (Inspect detailed BGP routes, attributes, next hops, and the active-path indication.), not the specified action.

B:

This outcome is associated with BGP next-hop validity (Restore IP routing reachability to the route's recursive BGP next hop.), not the specified action.

C:

This outcome is associated with Origin type tie break (Use the BGP origin-attribute comparison in the supported path selection sequence.), not the specified action.

Question 151

Two BGP routes have equal local preference but different numbers of AS entries in their AS paths. A colleague instead suggests: Use the BGP origin-attribute comparison in the supported path selection sequence. Which corrective approach most directly addresses the original issue?

  1. Prefer the route with the shorter AS-path length under the normal selection sequence.
  2. Use the BGP origin-attribute comparison in the supported path selection sequence.
  3. Restore IP routing reachability to the route's recursive BGP next hop.
  4. Inspect detailed BGP routes, attributes, next hops, and the active-path indication.

Explanation

Correct Answer

A:

This corrective choice addresses Shorter AS path. The fewer-AS route can win when earlier selection criteria are equal.

Incorrect Answers

B:

That alternative applies to Origin type tie break instead. A route with IGP origin can be preferred over an incomplete-origin path in this tie.

C:

That alternative applies to BGP next-hop validity instead. The path can participate in valid best-path selection after next-hop resolution.

D:

That alternative applies to BGP selection evidence instead. The ranking evidence can identify the selection criterion behind the chosen path.

Question 152

An enterprise network designer recommends: Prefer the route with the shorter AS-path length under the normal selection sequence. Which situation most clearly calls for this action?

  1. A router receives three BGP paths but only one is active and operators need to understand the decision.
  2. Two BGP routes have equal local preference but different numbers of AS entries in their AS paths.
  3. BGP alternatives have equal higher-priority attributes but one has IGP origin and the other has incomplete origin.
  4. A high-local-preference route is received but its next hop cannot be resolved to an outbound interface.

Explanation

Correct Answer

B:

This case requires the Shorter AS path action. The fewer-AS route can win when earlier selection criteria are equal.

Incorrect Answers

A:

This other case would be better matched to Inspect detailed BGP routes, attributes, next hops, and the active-path indication. The ranking evidence can identify the selection criterion behind the chosen path.

C:

This other case would be better matched to Use the BGP origin-attribute comparison in the supported path selection sequence. A route with IGP origin can be preferred over an incomplete-origin path in this tie.

D:

This other case would be better matched to Restore IP routing reachability to the route's recursive BGP next hop. The path can participate in valid best-path selection after next-hop resolution.

Question 153

A neighboring AS advertises comparable paths with different multi-exit discriminator values. Which Junos networking action or protocol decision best addresses this requirement?

  1. Use policy to assign a higher BGP local-preference value to the route via exit A.
  2. Evaluate the lower MED where the BGP comparison rules permit MED comparison.
  3. Compare Junos route preference values across protocols before changing BGP policy.
  4. Apply the normal BGP preference for an EBGP path over an otherwise comparable IBGP path.

Explanation

Correct Answer

B:

This action addresses MED comparison. The MED attribute can influence choice among comparable ingress options from that AS.

Incorrect Answers

A:

That action targets Higher local preference: Local-preference ranking can steer outbound traffic toward the preferred egress. It does not directly resolve the stated MED comparison requirement.

C:

That action targets BGP route preference: The operator can identify why a non-BGP route wins active-route selection. It does not directly resolve the stated MED comparison requirement.

D:

That action targets EBGP over IBGP selection: The externally learned path can become preferred after higher priority criteria tie. It does not directly resolve the stated MED comparison requirement.

Question 154

A Junos network engineer takes this step: Evaluate the lower MED where the BGP comparison rules permit MED comparison. Which outcome most directly follows?

  1. The operator can identify why a non-BGP route wins active-route selection.
  2. The externally learned path can become preferred after higher priority criteria tie.
  3. The MED attribute can influence choice among comparable ingress options from that AS.
  4. Local-preference ranking can steer outbound traffic toward the preferred egress.

Explanation

Correct Answer

C:

This is the direct result of the MED comparison decision: The MED attribute can influence choice among comparable ingress options from that AS.

Incorrect Answers

A:

This outcome is associated with BGP route preference (Compare Junos route preference values across protocols before changing BGP policy.), not the specified action.

B:

This outcome is associated with EBGP over IBGP selection (Apply the normal BGP preference for an EBGP path over an otherwise comparable IBGP path.), not the specified action.

D:

This outcome is associated with Higher local preference (Use policy to assign a higher BGP local-preference value to the route via exit A.), not the specified action.

Question 155

A neighboring AS advertises comparable paths with different multi-exit discriminator values. A colleague instead suggests: Apply the normal BGP preference for an EBGP path over an otherwise comparable IBGP path. Which corrective approach most directly addresses the original issue?

  1. Use policy to assign a higher BGP local-preference value to the route via exit A.
  2. Compare Junos route preference values across protocols before changing BGP policy.
  3. Apply the normal BGP preference for an EBGP path over an otherwise comparable IBGP path.
  4. Evaluate the lower MED where the BGP comparison rules permit MED comparison.

Explanation

Correct Answer

D:

This corrective choice addresses MED comparison. The MED attribute can influence choice among comparable ingress options from that AS.

Incorrect Answers

A:

That alternative applies to Higher local preference instead. Local-preference ranking can steer outbound traffic toward the preferred egress.

B:

That alternative applies to BGP route preference instead. The operator can identify why a non-BGP route wins active-route selection.

C:

That alternative applies to EBGP over IBGP selection instead. The externally learned path can become preferred after higher priority criteria tie.

Question 156

An enterprise network designer recommends: Evaluate the lower MED where the BGP comparison rules permit MED comparison. Which situation most clearly calls for this action?

  1. A neighboring AS advertises comparable paths with different multi-exit discriminator values.
  2. Two otherwise comparable iBGP routes reach one destination, but the operator wants all AS-internal routers to prefer exit A.
  3. Two paths tie on earlier policy and path criteria, but one is learned from EBGP and one from IBGP.
  4. A prefix is received by BGP, yet a static route is selected as the active route in the Junos RIB.

Explanation

Correct Answer

A:

This case requires the MED comparison action. The MED attribute can influence choice among comparable ingress options from that AS.

Incorrect Answers

B:

This other case would be better matched to Use policy to assign a higher BGP local-preference value to the route via exit A. Local-preference ranking can steer outbound traffic toward the preferred egress.

C:

This other case would be better matched to Apply the normal BGP preference for an EBGP path over an otherwise comparable IBGP path. The externally learned path can become preferred after higher priority criteria tie.

D:

This other case would be better matched to Compare Junos route preference values across protocols before changing BGP policy. The operator can identify why a non-BGP route wins active-route selection.

Question 157

BGP alternatives have equal higher-priority attributes but one has IGP origin and the other has incomplete origin. Which Junos networking action or protocol decision best addresses this requirement?

  1. Use the BGP origin-attribute comparison in the supported path selection sequence.
  2. Restore IP routing reachability to the route's recursive BGP next hop.
  3. Inspect detailed BGP routes, attributes, next hops, and the active-path indication.
  4. Prefer the route with the shorter AS-path length under the normal selection sequence.

Explanation

Correct Answer

A:

This action addresses Origin type tie break. A route with IGP origin can be preferred over an incomplete-origin path in this tie.

Incorrect Answers

B:

That action targets BGP next-hop validity: The path can participate in valid best-path selection after next-hop resolution. It does not directly resolve the stated Origin type tie break requirement.

C:

That action targets BGP selection evidence: The ranking evidence can identify the selection criterion behind the chosen path. It does not directly resolve the stated Origin type tie break requirement.

D:

That action targets Shorter AS path: The fewer-AS route can win when earlier selection criteria are equal. It does not directly resolve the stated Origin type tie break requirement.

Question 158

A Junos network engineer takes this step: Use the BGP origin-attribute comparison in the supported path selection sequence. Which outcome most directly follows?

  1. The ranking evidence can identify the selection criterion behind the chosen path.
  2. A route with IGP origin can be preferred over an incomplete-origin path in this tie.
  3. The path can participate in valid best-path selection after next-hop resolution.
  4. The fewer-AS route can win when earlier selection criteria are equal.

Explanation

Correct Answer

B:

This is the direct result of the Origin type tie break decision: A route with IGP origin can be preferred over an incomplete-origin path in this tie.

Incorrect Answers

A:

This outcome is associated with BGP selection evidence (Inspect detailed BGP routes, attributes, next hops, and the active-path indication.), not the specified action.

C:

This outcome is associated with BGP next-hop validity (Restore IP routing reachability to the route's recursive BGP next hop.), not the specified action.

D:

This outcome is associated with Shorter AS path (Prefer the route with the shorter AS-path length under the normal selection sequence.), not the specified action.

Question 159

BGP alternatives have equal higher-priority attributes but one has IGP origin and the other has incomplete origin. A colleague instead suggests: Restore IP routing reachability to the route's recursive BGP next hop. Which corrective approach most directly addresses the original issue?

  1. Inspect detailed BGP routes, attributes, next hops, and the active-path indication.
  2. Prefer the route with the shorter AS-path length under the normal selection sequence.
  3. Use the BGP origin-attribute comparison in the supported path selection sequence.
  4. Restore IP routing reachability to the route's recursive BGP next hop.

Explanation

Correct Answer

C:

This corrective choice addresses Origin type tie break. A route with IGP origin can be preferred over an incomplete-origin path in this tie.

Incorrect Answers

A:

That alternative applies to BGP selection evidence instead. The ranking evidence can identify the selection criterion behind the chosen path.

B:

That alternative applies to Shorter AS path instead. The fewer-AS route can win when earlier selection criteria are equal.

D:

That alternative applies to BGP next-hop validity instead. The path can participate in valid best-path selection after next-hop resolution.

Question 160

An enterprise network designer recommends: Use the BGP origin-attribute comparison in the supported path selection sequence. Which situation most clearly calls for this action?

  1. A high-local-preference route is received but its next hop cannot be resolved to an outbound interface.
  2. A router receives three BGP paths but only one is active and operators need to understand the decision.
  3. Two BGP routes have equal local preference but different numbers of AS entries in their AS paths.
  4. BGP alternatives have equal higher-priority attributes but one has IGP origin and the other has incomplete origin.

Explanation

Correct Answer

D:

This case requires the Origin type tie break action. A route with IGP origin can be preferred over an incomplete-origin path in this tie.

Incorrect Answers

A:

This other case would be better matched to Restore IP routing reachability to the route's recursive BGP next hop. The path can participate in valid best-path selection after next-hop resolution.

B:

This other case would be better matched to Inspect detailed BGP routes, attributes, next hops, and the active-path indication. The ranking evidence can identify the selection criterion behind the chosen path.

C:

This other case would be better matched to Prefer the route with the shorter AS-path length under the normal selection sequence. The fewer-AS route can win when earlier selection criteria are equal.

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