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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

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Implementing Cisco Enterprise Advanced Routing and Services (ENARSI) (300-410) Practice Tests

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Cisco 300-410 Practice Test 12

Question 110

At the Aspen agricultural office, short management packets pass through the DMVPN, but larger TCP sessions repeatedly stall after encapsulation. Which operational change most directly addresses the fault described?

  1. Set appropriate tunnel MTU and TCP MSS handling based on GRE/IPsec overhead and verified PMTUD behavior.
  2. Verify that NHRP resolves the remote spoke's NBMA address and that direct tunnels are permitted.
  3. Align the mutually supported IKE policy parameters for the approved VPN peers.
  4. Restore end-to-end label distribution and forwarding for the intended remote FEC.

Explanation

Correct Answer

A:

Set appropriate tunnel MTU and TCP MSS handling based on GRE/IPsec overhead and verified PMTUD behavior. That directly addresses the documented condition at the Aspen agricultural office: Encapsulation reduces effective payload MTU, causing large packets to fragment or be dropped. Confirmation should show that large application transfers complete without persistent fragmentation or TCP MSS black holes.

Incorrect Answers

B:

That change targets dmvpn spoke-to-spoke nhrp resolution, not the reported gre over ipsec mtu and mss fault at the Aspen agricultural office. Encapsulation reduces effective payload MTU, causing large packets to fragment or be dropped.

C:

This is appropriate for a different routing or network-control issue: The IKE phase cannot agree on a compatible authenticated cryptographic proposal. The stated evidence at the Aspen agricultural office instead concerns gre over ipsec mtu and mss.

D:

This could help where mpls unlabelled core hop is the issue, but not for the evidence reported at the Aspen agricultural office. Encapsulation reduces effective payload MTU, causing large packets to fragment or be dropped.

Question 111

At the Cedarbrook hospital, remote TACACS+ authentication becomes unreachable, and administrators are locked out of R-CDR-WAN1 despite a properly maintained emergency local account. Which operational change most directly addresses the fault described?

  1. Apply the intended named AAA login method list to the correct VTY line configuration.
  2. Correct the relevant exec or command authorization policy after confirming the operator's approved privileges.
  3. Use a management AAA design with TACACS+ command authorization and accounting where required by policy.
  4. Use an authorized AAA method list with a local fallback after unavailable remote servers, preserving the existing remote-first policy.

Explanation

Correct Answer

D:

The fault at the Cedarbrook hospital has a specific cause. The AAA login method has no usable local fallback when the remote authentication server fails. Use an authorized AAA method list with a local fallback after unavailable remote servers, preserving the existing remote-first policy. Confirm success against this result: An authorized local break-glass account can log in when TACACS+ is unavailable, while normal logins use TACACS+ when restored.

Incorrect Answers

A:

This is appropriate for a different routing or network-control issue: The configured named method list is not bound to the management access path where authentication occurs. The stated evidence at the Cedarbrook hospital instead concerns aaa local fallback on server outage.

B:

This could help where aaa authorization versus authentication is the issue, but not for the evidence reported at the Cedarbrook hospital. The AAA login method has no usable local fallback when the remote authentication server fails.

C:

That change targets tacacs+ versus radius protocol roles, not the reported aaa local fallback on server outage fault at the Cedarbrook hospital. The AAA login method has no usable local fallback when the remote authentication server fails.

Question 112

At the Redwood medical campus, remote TACACS+ authentication becomes unreachable, and administrators are locked out of R-RED-EDGE1 despite a properly maintained emergency local account. Which operational change most directly addresses the fault described?

  1. Use an authorized AAA method list with a local fallback after unavailable remote servers, preserving the existing remote-first policy.
  2. Recalculate the wildcard mask to match precisely the intended IPv4 address block.
  3. Select a suitable source-validation mode and design that accounts for legitimate asymmetric paths.
  4. Tune the SSH-management CoPP class for the legitimate approved workload without removing protective rate limits.

Explanation

Correct Answer

A:

At the Redwood medical campus, the evidence points to a concrete mechanism rather than a generic outage. The AAA login method has no usable local fallback when the remote authentication server fails. Use an authorized AAA method list with a local fallback after unavailable remote servers, preserving the existing remote-first policy. Confirm it by checking that an authorized local break-glass account can log in when TACACS+ is unavailable, while normal logins use TACACS+ when restored.

Incorrect Answers

B:

This is appropriate for a different routing or network-control issue: Wildcard bits determine which address positions are ignored, and the current value does not represent the intended network. The stated evidence at the Redwood medical campus instead concerns aaa local fallback on server outage.

C:

This could help where urpf strict in asymmetric topology is the issue, but not for the evidence reported at the Redwood medical campus. The AAA login method has no usable local fallback when the remote authentication server fails.

D:

That change targets copp management ssh rate-limiting, not the reported aaa local fallback on server outage fault at the Redwood medical campus. The AAA login method has no usable local fallback when the remote authentication server fails.

Question 113

At the Clearwater library district, a secure AAA login method list exists on R-CLW-EDGE1, yet VTY access is still authenticated by an older default policy. Which operational change most directly addresses the fault described?

  1. Apply the intended named AAA login method list to the correct VTY line configuration.
  2. Apply IPv6 Source Guard with valid address binding data on the relevant untrusted access port.
  3. Correct the time-range definition and the device time reference used by the ACL.
  4. Enable IPv6 Router Advertisement Guard on untrusted ports with trusted router uplinks correctly identified.

Explanation

Correct Answer

A:

Apply the intended named AAA login method list to the correct VTY line configuration. That directly addresses the documented condition at the Clearwater library district: The configured named method list is not bound to the management access path where authentication occurs. Confirmation should show that VTY logins follow the named authentication sequence with expected accept and reject results.

Incorrect Answers

B:

That change targets ipv6 source guard and bindings, not the reported aaa method list applied to wrong lines fault at the Clearwater library district. The configured named method list is not bound to the management access path where authentication occurs.

C:

This is appropriate for a different routing or network-control issue: The time-based ACL entry is inactive at the time packets arrive despite matching source and destination criteria. The stated evidence at the Clearwater library district instead concerns aaa method list applied to wrong lines.

D:

This could help where ipv6 rogue router advertisement is the issue, but not for the evidence reported at the Clearwater library district. The configured named method list is not bound to the management access path where authentication occurs.

Question 114

At the Bayview university campus, a secure AAA login method list exists on R-BAY-DIST1, yet VTY access is still authenticated by an older default policy. Which operational change most directly addresses the fault described?

  1. Attach the ACL in the correct direction on the interface that actually sees the traffic.
  2. Use strict uRPF where the topology supports it, or explicitly document loose-mode reachability-only validation.
  3. Apply the intended named AAA login method list to the correct VTY line configuration.
  4. Correct the relevant exec or command authorization policy after confirming the operator's approved privileges.

Explanation

Correct Answer

C:

At the Bayview university campus, the evidence points to a concrete mechanism rather than a generic outage. The configured named method list is not bound to the management access path where authentication occurs. Apply the intended named AAA login method list to the correct VTY line configuration. Confirm it by checking that VTY logins follow the named authentication sequence with expected accept and reject results.

Incorrect Answers

A:

This is appropriate for a different routing or network-control issue: The ACL attachment direction or interface does not intersect the targeted packet flow. The stated evidence at the Bayview university campus instead concerns aaa method list applied to wrong lines.

B:

This could help where urpf loose versus strict source check is the issue, but not for the evidence reported at the Bayview university campus. The configured named method list is not bound to the management access path where authentication occurs.

D:

This is appropriate for a different routing or network-control issue: Authentication succeeded, but separate AAA authorization does not permit the requested command. The stated evidence at the Bayview university campus instead concerns aaa method list applied to wrong lines.

Question 115

At the Foothill municipal site, a user successfully authenticates to R-FOO-DIST1 but receives a command-authorization denial for a permitted maintenance command. Which operational change most directly addresses the fault described?

  1. Use supported IPv6 ND inspection or snooping with trusted binding information on the access segment.
  2. Correct the relevant exec or command authorization policy after confirming the operator's approved privileges.
  3. Add a narrowly scoped permit for the authorized source and service above the implicit deny.
  4. Attach the ACL in the correct direction on the interface that actually sees the traffic.

Explanation

Correct Answer

B:

The fault at the Foothill municipal site has a specific cause. Authentication succeeded, but separate AAA authorization does not permit the requested command. Correct the relevant exec or command authorization policy after confirming the operator's approved privileges. Confirm success against this result: The authorized operator executes only approved maintenance commands and unauthorized commands remain denied.

Incorrect Answers

A:

That change targets ipv6 neighbor discovery inspection, not the reported aaa authorization versus authentication fault at the Foothill municipal site. Authentication succeeded, but separate AAA authorization does not permit the requested command.

C:

This could help where ipv4 acl implicit deny is the issue, but not for the evidence reported at the Foothill municipal site. Authentication succeeded, but separate AAA authorization does not permit the requested command.

D:

That change targets extended acl inbound/outbound orientation, not the reported aaa authorization versus authentication fault at the Foothill municipal site. Authentication succeeded, but separate AAA authorization does not permit the requested command.

Question 116

At the Highland government office, a user successfully authenticates to R-HIG-RT1 but receives a command-authorization denial for a permitted maintenance command. Which operational change most directly addresses the fault described?

  1. Adjust the CoPP classification and authorized BGP control traffic rate according to measured demand and attack protection needs.
  2. Recalculate the wildcard mask to match precisely the intended IPv4 address block.
  3. Apply the IPv6 ACL to the correct routed interface and incoming direction.
  4. Correct the relevant exec or command authorization policy after confirming the operator's approved privileges.

Explanation

Correct Answer

D:

Correct the relevant exec or command authorization policy after confirming the operator's approved privileges. That directly addresses the documented condition at the Highland government office: Authentication succeeded, but separate AAA authorization does not permit the requested command. Confirmation should show that the authorized operator executes only approved maintenance commands and unauthorized commands remain denied.

Incorrect Answers

A:

This could help where copp control-plane bgp drops is the issue, but not for the evidence reported at the Highland government office. Authentication succeeded, but separate AAA authorization does not permit the requested command.

B:

That change targets ipv4 wildcard mask matching, not the reported aaa authorization versus authentication fault at the Highland government office. Authentication succeeded, but separate AAA authorization does not permit the requested command.

C:

This is appropriate for a different routing or network-control issue: The IPv6 access-classification policy is not attached to the traffic ingress path being protected. The stated evidence at the Highland government office instead concerns aaa authorization versus authentication.

Question 117

At the Brookstone distribution branch, a network team needs detailed device command authorization and command accounting but deploys only a basic RADIUS login profile. Which operational change most directly addresses the fault described?

  1. Enable IPv6 Router Advertisement Guard on untrusted ports with trusted router uplinks correctly identified.
  2. Attach the ACL in the correct direction on the interface that actually sees the traffic.
  3. Use an authorized AAA method list with a local fallback after unavailable remote servers, preserving the existing remote-first policy.
  4. Use a management AAA design with TACACS+ command authorization and accounting where required by policy.

Explanation

Correct Answer

D:

The fault at the Brookstone distribution branch has a specific cause. The selected login-only RADIUS integration does not provide the intended granular device command control. Use a management AAA design with TACACS+ command authorization and accounting where required by policy. Confirm success against this result: Approved commands are enforced and attributable command-accounting records appear at the AAA service.

Incorrect Answers

A:

This is appropriate for a different routing or network-control issue: An untrusted access device is sending RAs that change hosts' IPv6 default-router selection. The stated evidence at the Brookstone distribution branch instead concerns tacacs+ versus radius protocol roles.

B:

This could help where extended acl inbound/outbound orientation is the issue, but not for the evidence reported at the Brookstone distribution branch. The selected login-only RADIUS integration does not provide the intended granular device command control.

C:

That change targets aaa local fallback on server outage, not the reported tacacs+ versus radius protocol roles fault at the Brookstone distribution branch. The selected login-only RADIUS integration does not provide the intended granular device command control.

Question 118

At the Silverstream data center, a network team needs detailed device command authorization and command accounting but deploys only a basic RADIUS login profile. Which operational change most directly addresses the fault described?

  1. Correct the control-plane class match to identify OSPF protocol 89 and keep its intended policy limits.
  2. Select a suitable source-validation mode and design that accounts for legitimate asymmetric paths.
  3. Adjust the CoPP classification and authorized BGP control traffic rate according to measured demand and attack protection needs.
  4. Use a management AAA design with TACACS+ command authorization and accounting where required by policy.

Explanation

Correct Answer

D:

At the Silverstream data center, the evidence points to a concrete mechanism rather than a generic outage. The selected login-only RADIUS integration does not provide the intended granular device command control. Use a management AAA design with TACACS+ command authorization and accounting where required by policy. Confirm it by checking that approved commands are enforced and attributable command-accounting records appear at the AAA service.

Incorrect Answers

A:

That change targets copp protocol classification error, not the reported tacacs+ versus radius protocol roles fault at the Silverstream data center. The selected login-only RADIUS integration does not provide the intended granular device command control.

B:

This is appropriate for a different routing or network-control issue: Strict uRPF rejects packets whose incoming interface is not the router's reverse best path toward the source. The stated evidence at the Silverstream data center instead concerns tacacs+ versus radius protocol roles.

C:

This could help where copp control-plane bgp drops is the issue, but not for the evidence reported at the Silverstream data center. The selected login-only RADIUS integration does not provide the intended granular device command control.

Question 119

At the Lakeside transit hub, an IPv4 ACL on R-LAK-CORE1 allows two explicit applications, but an otherwise legitimate management source loses connectivity after the ACL is applied. Which operational change most directly addresses the fault described?

  1. Add a narrowly scoped permit for the authorized source and service above the implicit deny.
  2. Place the source-only standard ACL close to the intended destination or use an appropriate extended ACL.
  3. Apply the IPv6 ACL to the correct routed interface and incoming direction.
  4. Recalculate the wildcard mask to match precisely the intended IPv4 address block.

Explanation

Correct Answer

A:

Add a narrowly scoped permit for the authorized source and service above the implicit deny. That directly addresses the documented condition at the Lakeside transit hub: Packets that do not match an ACL permit statement are denied by the implicit final rule. Confirmation should show that the authorized management flow passes while test traffic outside the approved policy remains blocked.

Incorrect Answers

B:

That change targets standard acl source-only matching, not the reported ipv4 acl implicit deny fault at the Lakeside transit hub. Packets that do not match an ACL permit statement are denied by the implicit final rule.

C:

This is appropriate for a different routing or network-control issue: The IPv6 access-classification policy is not attached to the traffic ingress path being protected. The stated evidence at the Lakeside transit hub instead concerns ipv4 acl implicit deny.

D:

This could help where ipv4 wildcard mask matching is the issue, but not for the evidence reported at the Lakeside transit hub. Packets that do not match an ACL permit statement are denied by the implicit final rule.

Question 120

At the Southridge banking office, an IPv4 ACL on R-SRG-EDGE1 allows two explicit applications, but an otherwise legitimate management source loses connectivity after the ACL is applied. Which operational change most directly addresses the fault described?

  1. Apply the IPv6 ACL to the correct routed interface and incoming direction.
  2. Correct the time-range definition and the device time reference used by the ACL.
  3. Place the source-only standard ACL close to the intended destination or use an appropriate extended ACL.
  4. Add a narrowly scoped permit for the authorized source and service above the implicit deny.

Explanation

Correct Answer

D:

The fault at the Southridge banking office has a specific cause. Packets that do not match an ACL permit statement are denied by the implicit final rule. Add a narrowly scoped permit for the authorized source and service above the implicit deny. Confirm success against this result: The authorized management flow passes while test traffic outside the approved policy remains blocked.

Incorrect Answers

A:

This is appropriate for a different routing or network-control issue: The IPv6 access-classification policy is not attached to the traffic ingress path being protected. The stated evidence at the Southridge banking office instead concerns ipv4 acl implicit deny.

B:

This could help where time-based acl inactive schedule is the issue, but not for the evidence reported at the Southridge banking office. Packets that do not match an ACL permit statement are denied by the implicit final rule.

C:

That change targets standard acl source-only matching, not the reported ipv4 acl implicit deny fault at the Southridge banking office. Packets that do not match an ACL permit statement are denied by the implicit final rule.