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Cisco 300-410 Bundle

Exam Code: 300-410

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

Certification Provider: Cisco

Corresponding Certification: CCNP Enterprise

Cisco 300-410 Bundle $25.00
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Cisco 300-410 Practice Test 35

Question 340

At the Brookstone distribution branch, authorized SSH sessions to R-BRK-EDGE1 fail intermittently during routine automation runs, and the CoPP management class shows sustained packet drops. Which underlying technical condition best accounts for this evidence?

  1. The network is not enforcing a source IPv6 address-to-port binding for endpoint traffic.
  2. The control-plane classifier does not match OSPF packets as expected.
  3. A too-small management control-plane policer drops permitted SSH traffic during ordinary operations.
  4. An untrusted access device is sending RAs that change hosts' IPv6 default-router selection.

Explanation

Correct Answer

C:

This diagnosis fits the symptoms at the Brookstone distribution branch. A too-small management control-plane policer drops permitted SSH traffic during ordinary operations. The remedial action is: Tune the SSH-management CoPP class for the legitimate approved workload without removing protective rate limits.

Incorrect Answers

A:

The observation at the Brookstone distribution branch does not point to ipv6 source guard and bindings; it points to a different condition. A too-small management control-plane policer drops permitted SSH traffic during ordinary operations.

B:

This diagnoses a different mechanism: The control-plane classifier does not match OSPF packets as expected. The reported symptom at the Brookstone distribution branch instead concerns copp management ssh rate-limiting.

D:

The observation at the Brookstone distribution branch does not point to ipv6 rogue router advertisement; it points to a different condition. A too-small management control-plane policer drops permitted SSH traffic during ordinary operations.

Question 341

At the Southridge banking office, hosts on a campus VLAN adopt an unexpected IPv6 default gateway advertised by a device on an untrusted access port. Which underlying technical condition best accounts for this evidence?

  1. A restrictive control-plane policing class is discarding legitimate BGP packets.
  2. The network is not enforcing a source IPv6 address-to-port binding for endpoint traffic.
  3. Forged neighbor advertisement information can poison IPv6 neighbor mappings on the LAN.
  4. An untrusted access device is sending RAs that change hosts' IPv6 default-router selection.

Explanation

Correct Answer

D:

This diagnosis fits the symptoms at the Southridge banking office. An untrusted access device is sending RAs that change hosts' IPv6 default-router selection. The remedial action is: Enable IPv6 Router Advertisement Guard on untrusted ports with trusted router uplinks correctly identified.

Incorrect Answers

A:

That diagnosis belongs to copp control-plane bgp drops, while the observation at the Southridge banking office points to ipv6 rogue router advertisement.

B:

The observation at the Southridge banking office does not point to ipv6 source guard and bindings; it points to a different condition. An untrusted access device is sending RAs that change hosts' IPv6 default-router selection.

C:

This diagnoses a different mechanism: Forged neighbor advertisement information can poison IPv6 neighbor mappings on the LAN. The reported symptom at the Southridge banking office instead concerns ipv6 rogue router advertisement.

Question 342

At the Lakeside transit hub, hosts on a campus VLAN adopt an unexpected IPv6 default gateway advertised by a device on an untrusted access port. Which underlying technical condition best accounts for this evidence?

  1. Authentication and authorization are active, but command-level accounting records are not being collected.
  2. A rogue DHCPv6 responder can influence hosts even when router advertisements are controlled separately.
  3. An untrusted access device is sending RAs that change hosts' IPv6 default-router selection.
  4. The control-plane classifier does not match OSPF packets as expected.

Explanation

Correct Answer

C:

The evidence at the Lakeside transit hub supports this condition: An untrusted access device is sending RAs that change hosts' IPv6 default-router selection. The associated fix is: Enable IPv6 Router Advertisement Guard on untrusted ports with trusted router uplinks correctly identified.

Incorrect Answers

A:

This diagnoses a different mechanism: Authentication and authorization are active, but command-level accounting records are not being collected. The reported symptom at the Lakeside transit hub instead concerns ipv6 rogue router advertisement.

B:

That diagnosis belongs to ipv6 dhcpv6 guard, while the observation at the Lakeside transit hub points to ipv6 rogue router advertisement.

D:

This diagnoses a different mechanism: The control-plane classifier does not match OSPF packets as expected. The reported symptom at the Lakeside transit hub instead concerns ipv6 rogue router advertisement.

Question 343

At the Pinecrest freight terminal, endpoints receive unauthorized DHCPv6 information from a newly attached access-port device, despite having correct IPv6 Router Advertisement settings. Which underlying technical condition best accounts for this evidence?

  1. A restrictive control-plane policing class is discarding legitimate BGP packets.
  2. A rogue DHCPv6 responder can influence hosts even when router advertisements are controlled separately.
  3. The network is not enforcing a source IPv6 address-to-port binding for endpoint traffic.
  4. A too-small management control-plane policer drops permitted SSH traffic during ordinary operations.

Explanation

Correct Answer

B:

A rogue DHCPv6 responder can influence hosts even when router advertisements are controlled separately. That explains the specific symptom at the Pinecrest freight terminal. A direct corrective action is: Apply DHCPv6 Guard on untrusted access ports, permitting only approved DHCPv6 server or relay sources.

Incorrect Answers

A:

The observation at the Pinecrest freight terminal does not point to copp control-plane bgp drops; it points to a different condition. A rogue DHCPv6 responder can influence hosts even when router advertisements are controlled separately.

C:

That diagnosis belongs to ipv6 source guard and bindings, while the observation at the Pinecrest freight terminal points to ipv6 dhcpv6 guard.

D:

The observation at the Pinecrest freight terminal does not point to copp management ssh rate-limiting; it points to a different condition. A rogue DHCPv6 responder can influence hosts even when router advertisements are controlled separately.

Question 344

At the Westlake utility network, endpoints receive unauthorized DHCPv6 information from a newly attached access-port device, despite having correct IPv6 Router Advertisement settings. Which underlying technical condition best accounts for this evidence?

  1. The control-plane classifier does not match OSPF packets as expected.
  2. A rogue DHCPv6 responder can influence hosts even when router advertisements are controlled separately.
  3. A restrictive control-plane policing class is discarding legitimate BGP packets.
  4. An untrusted access device is sending RAs that change hosts' IPv6 default-router selection.

Explanation

Correct Answer

B:

The evidence at the Westlake utility network supports this condition: A rogue DHCPv6 responder can influence hosts even when router advertisements are controlled separately. The associated fix is: Apply DHCPv6 Guard on untrusted access ports, permitting only approved DHCPv6 server or relay sources.

Incorrect Answers

A:

That diagnosis belongs to copp protocol classification error, while the observation at the Westlake utility network points to ipv6 dhcpv6 guard.

C:

This diagnoses a different mechanism: A restrictive control-plane policing class is discarding legitimate BGP packets. The reported symptom at the Westlake utility network instead concerns ipv6 dhcpv6 guard.

D:

That diagnosis belongs to ipv6 rogue router advertisement, while the observation at the Westlake utility network points to ipv6 dhcpv6 guard.

Question 345

At the Bluewater clinical network, a hostile endpoint on an access VLAN spoofs Neighbor Discovery information and redirects traffic for a legitimate local IPv6 peer. Which underlying technical condition best accounts for this evidence?

  1. An untrusted access device is sending RAs that change hosts' IPv6 default-router selection.
  2. A rogue DHCPv6 responder can influence hosts even when router advertisements are controlled separately.
  3. Forged neighbor advertisement information can poison IPv6 neighbor mappings on the LAN.
  4. The network is not enforcing a source IPv6 address-to-port binding for endpoint traffic.

Explanation

Correct Answer

C:

The evidence at the Bluewater clinical network supports this condition: Forged neighbor advertisement information can poison IPv6 neighbor mappings on the LAN. The associated fix is: Use supported IPv6 ND inspection or snooping with trusted binding information on the access segment.

Incorrect Answers

A:

This diagnoses a different mechanism: An untrusted access device is sending RAs that change hosts' IPv6 default-router selection. The reported symptom at the Bluewater clinical network instead concerns ipv6 neighbor discovery inspection.

B:

That diagnosis belongs to ipv6 dhcpv6 guard, while the observation at the Bluewater clinical network points to ipv6 neighbor discovery inspection.

D:

This diagnoses a different mechanism: The network is not enforcing a source IPv6 address-to-port binding for endpoint traffic. The reported symptom at the Bluewater clinical network instead concerns ipv6 neighbor discovery inspection.

Question 346

At the Cedarfield retail branch, a hostile endpoint on an access VLAN spoofs Neighbor Discovery information and redirects traffic for a legitimate local IPv6 peer. Which underlying technical condition best accounts for this evidence?

  1. A too-small management control-plane policer drops permitted SSH traffic during ordinary operations.
  2. A rogue DHCPv6 responder can influence hosts even when router advertisements are controlled separately.
  3. Forged neighbor advertisement information can poison IPv6 neighbor mappings on the LAN.
  4. The control-plane classifier does not match OSPF packets as expected.

Explanation

Correct Answer

C:

This diagnosis fits the symptoms at the Cedarfield retail branch. Forged neighbor advertisement information can poison IPv6 neighbor mappings on the LAN. The remedial action is: Use supported IPv6 ND inspection or snooping with trusted binding information on the access segment.

Incorrect Answers

A:

The observation at the Cedarfield retail branch does not point to copp management ssh rate-limiting; it points to a different condition. Forged neighbor advertisement information can poison IPv6 neighbor mappings on the LAN.

B:

This diagnoses a different mechanism: A rogue DHCPv6 responder can influence hosts even when router advertisements are controlled separately. The reported symptom at the Cedarfield retail branch instead concerns ipv6 neighbor discovery inspection.

D:

The observation at the Cedarfield retail branch does not point to copp protocol classification error; it points to a different condition. Forged neighbor advertisement information can poison IPv6 neighbor mappings on the LAN.

Question 347

At the Ironwood training campus, a device sends packets using an unassigned IPv6 source address on a port where endpoint identity and address bindings are known. Which underlying technical condition best accounts for this evidence?

  1. The network is not enforcing a source IPv6 address-to-port binding for endpoint traffic.
  2. An untrusted access device is sending RAs that change hosts' IPv6 default-router selection.
  3. A too-small management control-plane policer drops permitted SSH traffic during ordinary operations.
  4. A restrictive control-plane policing class is discarding legitimate BGP packets.

Explanation

Correct Answer

A:

This diagnosis fits the symptoms at the Ironwood training campus. The network is not enforcing a source IPv6 address-to-port binding for endpoint traffic. The remedial action is: Apply IPv6 Source Guard with valid address binding data on the relevant untrusted access port.

Incorrect Answers

B:

The observation at the Ironwood training campus does not point to ipv6 rogue router advertisement; it points to a different condition. The network is not enforcing a source IPv6 address-to-port binding for endpoint traffic.

C:

This diagnoses a different mechanism: A too-small management control-plane policer drops permitted SSH traffic during ordinary operations. The reported symptom at the Ironwood training campus instead concerns ipv6 source guard and bindings.

D:

That diagnosis belongs to copp control-plane bgp drops, while the observation at the Ironwood training campus points to ipv6 source guard and bindings.

Question 348

At the Harborview media campus, a device sends packets using an unassigned IPv6 source address on a port where endpoint identity and address bindings are known. Which underlying technical condition best accounts for this evidence?

  1. Authentication and authorization are active, but command-level accounting records are not being collected.
  2. The network is not enforcing a source IPv6 address-to-port binding for endpoint traffic.
  3. A rogue DHCPv6 responder can influence hosts even when router advertisements are controlled separately.
  4. The control-plane classifier does not match OSPF packets as expected.

Explanation

Correct Answer

B:

This diagnosis fits the symptoms at the Harborview media campus. The network is not enforcing a source IPv6 address-to-port binding for endpoint traffic. The remedial action is: Apply IPv6 Source Guard with valid address binding data on the relevant untrusted access port.

Incorrect Answers

A:

This diagnoses a different mechanism: Authentication and authorization are active, but command-level accounting records are not being collected. The reported symptom at the Harborview media campus instead concerns ipv6 source guard and bindings.

C:

The observation at the Harborview media campus does not point to ipv6 dhcpv6 guard; it points to a different condition. The network is not enforcing a source IPv6 address-to-port binding for endpoint traffic.

D:

This diagnoses a different mechanism: The control-plane classifier does not match OSPF packets as expected. The reported symptom at the Harborview media campus instead concerns ipv6 source guard and bindings.

Question 349

At the Northport logistics site, device administrators authenticate successfully and use permitted commands, but the security team cannot reconstruct who ran a sensitive configuration command. Which underlying technical condition best accounts for this evidence?

  1. The network is not enforcing a source IPv6 address-to-port binding for endpoint traffic.
  2. Authentication and authorization are active, but command-level accounting records are not being collected.
  3. Forged neighbor advertisement information can poison IPv6 neighbor mappings on the LAN.
  4. The control-plane classifier does not match OSPF packets as expected.

Explanation

Correct Answer

B:

Authentication and authorization are active, but command-level accounting records are not being collected. That explains the specific symptom at the Northport logistics site. A direct corrective action is: Enable and verify AAA command accounting with a reachable, trusted logging/accounting destination.

Incorrect Answers

A:

The observation at the Northport logistics site does not point to ipv6 source guard and bindings; it points to a different condition. Authentication and authorization are active, but command-level accounting records are not being collected.

C:

That diagnosis belongs to ipv6 neighbor discovery inspection, while the observation at the Northport logistics site points to aaa accounting gaps.

D:

The observation at the Northport logistics site does not point to copp protocol classification error; it points to a different condition. Authentication and authorization are active, but command-level accounting records are not being collected.

Question 350

At the Hillcrest research lab, device administrators authenticate successfully and use permitted commands, but the security team cannot reconstruct who ran a sensitive configuration command. Which underlying technical condition best accounts for this evidence?

  1. The network is not enforcing a source IPv6 address-to-port binding for endpoint traffic.
  2. A restrictive control-plane policing class is discarding legitimate BGP packets.
  3. An untrusted access device is sending RAs that change hosts' IPv6 default-router selection.
  4. Authentication and authorization are active, but command-level accounting records are not being collected.

Explanation

Correct Answer

D:

This diagnosis fits the symptoms at the Hillcrest research lab. Authentication and authorization are active, but command-level accounting records are not being collected. The remedial action is: Enable and verify AAA command accounting with a reachable, trusted logging/accounting destination.

Incorrect Answers

A:

That diagnosis belongs to ipv6 source guard and bindings, while the observation at the Hillcrest research lab points to aaa accounting gaps.

B:

The observation at the Hillcrest research lab does not point to copp control-plane bgp drops; it points to a different condition. Authentication and authorization are active, but command-level accounting records are not being collected.

C:

This diagnoses a different mechanism: An untrusted access device is sending RAs that change hosts' IPv6 default-router selection. The reported symptom at the Hillcrest research lab instead concerns aaa accounting gaps.