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Exam Code: 300-410

Exam Name Implementing Cisco Enterprise Advanced Routing and Services (ENARSI)

Certification Provider: Cisco

Corresponding Certification: CCNP Enterprise

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Cisco 300-410 Practice Test 67

Question 660

At the Harborview media campus, R-HAR-DIST1 must peer by eBGP with a reachable loopback on R-INL-DIST2 multiple routed hops away; TCP never reaches Established using default TTL behavior. Which continuing operational control is most directly relevant to preventing this problem?

  1. Test internal BGP propagation and exit choice after modifying local-preference policies.
  2. Monitor the recursive peer reachability and eBGP multihop settings after path changes.
  3. Distinguish router-local weight changes from propagated BGP attributes in policy reviews.
  4. Audit reflector client roles and BGP propagation after adding branches.

Explanation

Correct Answer

B:

This control monitors the relevant configuration or operational behavior at the Harborview media campus. Monitor the recursive peer reachability and eBGP multihop settings after path changes. It targets the condition described in the stem.

Incorrect Answers

A:

This is useful for another concern: Test internal BGP propagation and exit choice after modifying local-preference policies. It does not continuously test ebgp non-direct neighbor multihop at the Harborview media campus.

C:

That safeguard protects against bgp cisco weight local only, not the concrete risk described at the Harborview media campus. The default eBGP directly connected peer assumptions do not support this multiple-hop session.

D:

This is useful for another concern: Audit reflector client roles and BGP propagation after adding branches. It does not continuously test ebgp non-direct neighbor multihop at the Harborview media campus.

Question 661

At the Northport logistics site, R-NOR-WAN1 learns a customer prefix through iBGP, but cannot install it because the advertised external next hop is not reachable inside the AS. Which continuing operational control is most directly relevant to preventing this problem?

  1. Test internal BGP propagation and exit choice after modifying local-preference policies.
  2. Audit reflector client roles and BGP propagation after adding branches.
  3. Distinguish router-local weight changes from propagated BGP attributes in policy reviews.
  4. Validate next-hop reachability when advertising external routes to internal BGP peers.

Explanation

Correct Answer

D:

The safeguard follows the failure mechanism at the Northport logistics site. Validate next-hop reachability when advertising external routes to internal BGP peers.

Incorrect Answers

A:

That safeguard protects against bgp local preference path policy, not the concrete risk described at the Northport logistics site. The iBGP-learned path retains a next hop that the receiving router cannot resolve.

B:

This is useful for another concern: Audit reflector client roles and BGP propagation after adding branches. It does not continuously test ibgp next-hop reachability at the Northport logistics site.

C:

This would manage a different failure pattern. Cisco BGP weight affects path selection only on the local router and is not propagated to peers. It is not the most direct recurring check for ibgp next-hop reachability at the Northport logistics site.

Question 662

At the Hillcrest research lab, R-HCR-RT1 learns a customer prefix through iBGP, but cannot install it because the advertised external next hop is not reachable inside the AS. Which continuing operational control is most directly relevant to preventing this problem?

  1. Validate next-hop reachability when advertising external routes to internal BGP peers.
  2. Monitor accepted-prefix counts and prefix-filter changes per eBGP peer.
  3. Test internal BGP propagation and exit choice after modifying local-preference policies.
  4. Audit reflector client roles and BGP propagation after adding branches.

Explanation

Correct Answer

A:

This control monitors the relevant configuration or operational behavior at the Hillcrest research lab. Validate next-hop reachability when advertising external routes to internal BGP peers. It targets the condition described in the stem.

Incorrect Answers

B:

That safeguard protects against bgp inbound prefix filtering, not the concrete risk described at the Hillcrest research lab. The iBGP-learned path retains a next hop that the receiving router cannot resolve.

C:

This is useful for another concern: Test internal BGP propagation and exit choice after modifying local-preference policies. It does not continuously test ibgp next-hop reachability at the Hillcrest research lab.

D:

This would manage a different failure pattern. A normal iBGP speaker does not re-advertise routes learned from one iBGP peer to another. It is not the most direct recurring check for ibgp next-hop reachability at the Hillcrest research lab.

Question 663

At the Granite manufacturing plant, two iBGP clients connected to a central router do not learn each other's routes because the central router is not configured as a route reflector. Which continuing operational control is most directly relevant to preventing this problem?

  1. Test internal BGP propagation and exit choice after modifying local-preference policies.
  2. Monitor the recursive peer reachability and eBGP multihop settings after path changes.
  3. Validate next-hop reachability when advertising external routes to internal BGP peers.
  4. Audit reflector client roles and BGP propagation after adding branches.

Explanation

Correct Answer

D:

At the Granite manufacturing plant, this continuing check directly limits recurrence of the observed failure. Audit reflector client roles and BGP propagation after adding branches. The underlying problem is: A normal iBGP speaker does not re-advertise routes learned from one iBGP peer to another.

Incorrect Answers

A:

This is useful for another concern: Test internal BGP propagation and exit choice after modifying local-preference policies. It does not continuously test ibgp route reflection at the Granite manufacturing plant.

B:

This would manage a different failure pattern. The default eBGP directly connected peer assumptions do not support this multiple-hop session. It is not the most direct recurring check for ibgp route reflection at the Granite manufacturing plant.

C:

That safeguard protects against ibgp next-hop reachability, not the concrete risk described at the Granite manufacturing plant. A normal iBGP speaker does not re-advertise routes learned from one iBGP peer to another.

Question 664

At the Elmfield engineering office, two iBGP clients connected to a central router do not learn each other's routes because the central router is not configured as a route reflector. Which continuing operational control is most directly relevant to preventing this problem?

  1. Test internal BGP propagation and exit choice after modifying local-preference policies.
  2. Audit reflector client roles and BGP propagation after adding branches.
  3. Distinguish router-local weight changes from propagated BGP attributes in policy reviews.
  4. Monitor accepted-prefix counts and prefix-filter changes per eBGP peer.

Explanation

Correct Answer

B:

At the Elmfield engineering office, this continuing check directly limits recurrence of the observed failure. Audit reflector client roles and BGP propagation after adding branches. The underlying problem is: A normal iBGP speaker does not re-advertise routes learned from one iBGP peer to another.

Incorrect Answers

A:

That safeguard protects against bgp local preference path policy, not the concrete risk described at the Elmfield engineering office. A normal iBGP speaker does not re-advertise routes learned from one iBGP peer to another.

C:

This would manage a different failure pattern. Cisco BGP weight affects path selection only on the local router and is not propagated to peers. It is not the most direct recurring check for ibgp route reflection at the Elmfield engineering office.

D:

That safeguard protects against bgp inbound prefix filtering, not the concrete risk described at the Elmfield engineering office. A normal iBGP speaker does not re-advertise routes learned from one iBGP peer to another.

Question 665

At the Oakbridge insurance office, two egress providers advertise the same prefix; one has a shorter AS path but the business wants all internal routers to prefer the other exit. Which continuing operational control is most directly relevant to preventing this problem?

  1. Test internal BGP propagation and exit choice after modifying local-preference policies.
  2. Validate next-hop reachability when advertising external routes to internal BGP peers.
  3. Monitor the recursive peer reachability and eBGP multihop settings after path changes.
  4. Distinguish router-local weight changes from propagated BGP attributes in policy reviews.

Explanation

Correct Answer

A:

This control monitors the relevant configuration or operational behavior at the Oakbridge insurance office. Test internal BGP propagation and exit choice after modifying local-preference policies. It targets the condition described in the stem.

Incorrect Answers

B:

That safeguard protects against ibgp next-hop reachability, not the concrete risk described at the Oakbridge insurance office. BGP local preference is examined before AS-path length, and the present attributes favor the wrong exit.

C:

This is useful for another concern: Monitor the recursive peer reachability and eBGP multihop settings after path changes. It does not continuously test bgp local preference path policy at the Oakbridge insurance office.

D:

This would manage a different failure pattern. Cisco BGP weight affects path selection only on the local router and is not propagated to peers. It is not the most direct recurring check for bgp local preference path policy at the Oakbridge insurance office.

Question 666

At the Aspen agricultural office, two egress providers advertise the same prefix; one has a shorter AS path but the business wants all internal routers to prefer the other exit. Which continuing operational control is most directly relevant to preventing this problem?

  1. Validate next-hop reachability when advertising external routes to internal BGP peers.
  2. Test internal BGP propagation and exit choice after modifying local-preference policies.
  3. Distinguish router-local weight changes from propagated BGP attributes in policy reviews.
  4. Monitor accepted-prefix counts and prefix-filter changes per eBGP peer.

Explanation

Correct Answer

B:

This control monitors the relevant configuration or operational behavior at the Aspen agricultural office. Test internal BGP propagation and exit choice after modifying local-preference policies. It targets the condition described in the stem.

Incorrect Answers

A:

This is useful for another concern: Validate next-hop reachability when advertising external routes to internal BGP peers. It does not continuously test bgp local preference path policy at the Aspen agricultural office.

C:

That safeguard protects against bgp cisco weight local only, not the concrete risk described at the Aspen agricultural office. BGP local preference is examined before AS-path length, and the present attributes favor the wrong exit.

D:

This is useful for another concern: Monitor accepted-prefix counts and prefix-filter changes per eBGP peer. It does not continuously test bgp local preference path policy at the Aspen agricultural office.

Question 667

At the Cedarbrook hospital, an engineer sets a Cisco BGP weight on R-CDR-WAN1 and expects that value to change exit selection on every other router in the AS. Which continuing operational control is most directly relevant to preventing this problem?

  1. Validate next-hop reachability when advertising external routes to internal BGP peers.
  2. Audit reflector client roles and BGP propagation after adding branches.
  3. Monitor the recursive peer reachability and eBGP multihop settings after path changes.
  4. Distinguish router-local weight changes from propagated BGP attributes in policy reviews.

Explanation

Correct Answer

D:

The safeguard follows the failure mechanism at the Cedarbrook hospital. Distinguish router-local weight changes from propagated BGP attributes in policy reviews.

Incorrect Answers

A:

That safeguard protects against ibgp next-hop reachability, not the concrete risk described at the Cedarbrook hospital. Cisco BGP weight affects path selection only on the local router and is not propagated to peers.

B:

This is useful for another concern: Audit reflector client roles and BGP propagation after adding branches. It does not continuously test bgp cisco weight local only at the Cedarbrook hospital.

C:

This would manage a different failure pattern. The default eBGP directly connected peer assumptions do not support this multiple-hop session. It is not the most direct recurring check for bgp cisco weight local only at the Cedarbrook hospital.

Question 668

At the Redwood medical campus, an engineer sets a Cisco BGP weight on R-RED-EDGE1 and expects that value to change exit selection on every other router in the AS. Which continuing operational control is most directly relevant to preventing this problem?

  1. Distinguish router-local weight changes from propagated BGP attributes in policy reviews.
  2. Audit reflector client roles and BGP propagation after adding branches.
  3. Monitor the recursive peer reachability and eBGP multihop settings after path changes.
  4. Monitor accepted-prefix counts and prefix-filter changes per eBGP peer.

Explanation

Correct Answer

A:

This control monitors the relevant configuration or operational behavior at the Redwood medical campus. Distinguish router-local weight changes from propagated BGP attributes in policy reviews. It targets the condition described in the stem.

Incorrect Answers

B:

That safeguard protects against ibgp route reflection, not the concrete risk described at the Redwood medical campus. Cisco BGP weight affects path selection only on the local router and is not propagated to peers.

C:

This is useful for another concern: Monitor the recursive peer reachability and eBGP multihop settings after path changes. It does not continuously test bgp cisco weight local only at the Redwood medical campus.

D:

This would manage a different failure pattern. The current inbound BGP policy fails to constrain accepted advertisements to contracted prefixes. It is not the most direct recurring check for bgp cisco weight local only at the Redwood medical campus.

Question 669

At the Clearwater library district, an eBGP neighbor begins advertising unrelated routes and R-CLW-EDGE1 installs more prefixes than the agreed customer set. Which continuing operational control is most directly relevant to preventing this problem?

  1. Distinguish router-local weight changes from propagated BGP attributes in policy reviews.
  2. Validate next-hop reachability when advertising external routes to internal BGP peers.
  3. Monitor accepted-prefix counts and prefix-filter changes per eBGP peer.
  4. Audit reflector client roles and BGP propagation after adding branches.

Explanation

Correct Answer

C:

The safeguard follows the failure mechanism at the Clearwater library district. Monitor accepted-prefix counts and prefix-filter changes per eBGP peer.

Incorrect Answers

A:

This is useful for another concern: Distinguish router-local weight changes from propagated BGP attributes in policy reviews. It does not continuously test bgp inbound prefix filtering at the Clearwater library district.

B:

This would manage a different failure pattern. The iBGP-learned path retains a next hop that the receiving router cannot resolve. It is not the most direct recurring check for bgp inbound prefix filtering at the Clearwater library district.

D:

This is useful for another concern: Audit reflector client roles and BGP propagation after adding branches. It does not continuously test bgp inbound prefix filtering at the Clearwater library district.

Question 670

At the Bayview university campus, an eBGP neighbor begins advertising unrelated routes and R-BAY-DIST1 installs more prefixes than the agreed customer set. Which continuing operational control is most directly relevant to preventing this problem?

  1. Monitor the recursive peer reachability and eBGP multihop settings after path changes.
  2. Test internal BGP propagation and exit choice after modifying local-preference policies.
  3. Distinguish router-local weight changes from propagated BGP attributes in policy reviews.
  4. Monitor accepted-prefix counts and prefix-filter changes per eBGP peer.

Explanation

Correct Answer

D:

The safeguard follows the failure mechanism at the Bayview university campus. Monitor accepted-prefix counts and prefix-filter changes per eBGP peer.

Incorrect Answers

A:

That safeguard protects against ebgp non-direct neighbor multihop, not the concrete risk described at the Bayview university campus. The current inbound BGP policy fails to constrain accepted advertisements to contracted prefixes.

B:

This is useful for another concern: Test internal BGP propagation and exit choice after modifying local-preference policies. It does not continuously test bgp inbound prefix filtering at the Bayview university campus.

C:

This would manage a different failure pattern. Cisco BGP weight affects path selection only on the local router and is not propagated to peers. It is not the most direct recurring check for bgp inbound prefix filtering at the Bayview university campus.