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Huawei H12-821 Practice Test 50

Question 490

A Huawei network troubleshooter needs objective evidence for this case: A published application works from one partner but fails for another because a destination NAT rule matches the wrong original destination address. Which diagnostic check MOST DIRECTLY distinguishes the relevant problem? Select ONE best answer.

  1. Compare matched source/destination NAT rule, translated session tuple, security-zone permission and upstream route to the translated address.
  2. Inspect source and destination zones, policy match, existing session, NAT translation and deny logs for the tested client flow.
  3. Inspect the prefix-list rule sequence, base prefix, greater-than/less-than mask conditions and test routes immediately inside and outside the intended range.
  4. Review phase 1/IKE negotiation logs, IPsec child SA proposals, traffic selectors, encap/decap packet counters and the route to the remote subnet.

Explanation

Correct Answer

A:

The discriminating diagnostic check is: Compare matched source/destination NAT rule, translated session tuple, security-zone permission and upstream route to the translated address. In this incident (A published application works from one partner but fails for another because a destination NAT rule matches the wrong original destination address.) the desired evidence-led outcome is: The expected address mapping is applied to permitted sessions and response packets find their way back through the firewall.

Incorrect Answers

B:

This option proposes: Inspect source and destination zones, policy match, existing session, NAT translation and deny logs for the tested client flow. It addresses the different topic Stateful firewall sessions versus basic packet ACL filtering, not the directly tested Huawei firewall NAT and address translation context failure in the stated incident (A published application works from one partner but fails for another because a destination NAT rule matches the wrong original destination address.).

C:

This option proposes: Inspect the prefix-list rule sequence, base prefix, greater-than/less-than mask conditions and test routes immediately inside and outside the intended range. It addresses the different topic IP prefix filtering and exact route-match conditions, not the directly tested Huawei firewall NAT and address translation context failure in the stated incident (A published application works from one partner but fails for another because a destination NAT rule matches the wrong original destination address.).

D:

This option proposes: Review phase 1/IKE negotiation logs, IPsec child SA proposals, traffic selectors, encap/decap packet counters and the route to the remote subnet. It addresses the different topic IPsec VPN IKE negotiation versus ESP data channel, not the directly tested Huawei firewall NAT and address translation context failure in the stated incident (A published application works from one partner but fails for another because a destination NAT rule matches the wrong original destination address.).

Question 491

A network operator evaluates the result of a planned remediation. A published application works from one partner but fails for another because a destination NAT rule matches the wrong original destination address. The validation is: Compare matched source/destination NAT rule, translated session tuple, security-zone permission and upstream route to the translated address. Which outcome BEST establishes success? Select ONE best answer.

  1. Selected traffic takes the authorized alternate path while other packets retain ordinary valid destination-based routing.
  2. The peers establish valid security associations and approved subnet traffic is protected and forwarded through the intended tunnel.
  3. The expected address mapping is applied to permitted sessions and response packets find their way back through the firewall.
  4. Only authorized operators can perform intended device tasks over protected sessions, with sufficient audit history to attribute changes.

Explanation

Correct Answer

C:

That follows from the targeted Recommended action: Trace source or destination address translation separately from security policy when applications fail across a routed perimeter.

Incorrect Answers

A:

That option concerns Policy-based routing versus destination routing. That follows from the targeted Recommended action: Trace source or destination address translation separately from security policy when applications fail across a routed perimeter.

B:

That option concerns IPsec VPN IKE negotiation versus ESP data channel. That follows from the targeted Recommended action: Trace source or destination address translation separately from security policy when applications fail across a routed perimeter.

D:

That option concerns Network device AAA role SSH and management-plane protection. That follows from the targeted Recommended action: Trace source or destination address translation separately from security policy when applications fail across a routed perimeter.

Question 492

An operations change board examines an unsafe shortcut for this incident. A published application works from one partner but fails for another because a destination NAT rule matches the wrong original destination address. Which proposed assumption is MOST DIRECTLY dangerous or unsupported? Select ONE best answer.

  1. Treat successful UDP reachability to a VPN gateway as conclusive evidence that IKE authentication and IPsec child security associations are fully established.
  2. Require every desktop to change its configured default gateway to the backup router's physical interface address immediately after each VRRP election.
  3. Assume two routes with the same IPv4 prefix in different VRFs automatically merge into the global routing table and communicate freely.
  4. Create an inter-zone allow policy and assume that private source addresses will automatically be translated to a publicly routable address with no NAT rule.

Explanation

Correct Answer

D:

The unsafe assumption to reject is: Create an inter-zone allow policy and assume that private source addresses will automatically be translated to a publicly routable address with no NAT rule. It conflicts with: NAT rules change observed packet addresses under defined conditions, and a permitted security rule alone does not create a suitable translation mapping or solve upstream return routing. The supported corrective alternative is: Trace source or destination address translation separately from security policy when applications fail across a routed perimeter.

Incorrect Answers

A:

This option proposes: Treat successful UDP reachability to a VPN gateway as conclusive evidence that IKE authentication and IPsec child security associations are fully established. It addresses the different topic IPsec VPN IKE negotiation versus ESP data channel, not the directly tested Huawei firewall NAT and address translation context failure in the stated incident (A published application works from one partner but fails for another because a destination NAT rule matches the wrong original destination address.).

B:

This option proposes: Require every desktop to change its configured default gateway to the backup router's physical interface address immediately after each VRRP election. It addresses the different topic VRRP virtual MAC and endpoint ARP continuity, not the directly tested Huawei firewall NAT and address translation context failure in the stated incident (A published application works from one partner but fails for another because a destination NAT rule matches the wrong original destination address.).

C:

This option proposes: Assume two routes with the same IPv4 prefix in different VRFs automatically merge into the global routing table and communicate freely. It addresses the different topic VRF traffic separation and route leaking controls, not the directly tested Huawei firewall NAT and address translation context failure in the stated incident (A published application works from one partner but fails for another because a destination NAT rule matches the wrong original destination address.).

Question 493

A Huawei HCIP-Datacom engineer investigates the following network fault: A core uplink remains electrically up after its optical path becomes unidirectional, and OSPF neighbors do not declare failure quickly enough for application targets. Which corrective action should be prioritized on the stated facts? Select ONE best answer.

  1. Explain the DIS role on broadcast IS-IS circuits and why it differs from an OSPF DR/BDR election.
  2. Analyze Virtual Router Redundancy Protocol master election using priorities and the virtual router ID instead of a router's physical interface address alone.
  3. Check VRRP virtual IP and virtual MAC behavior while troubleshooting hosts that retain a stale default-gateway neighbor entry after failover.
  4. Use Bidirectional Forwarding Detection to provide rapid validated failure indications to a supported routing or redundancy protocol.

Explanation

Correct Answer

D:

The case-specific corrective step is: Use Bidirectional Forwarding Detection to provide rapid validated failure indications to a supported routing or redundancy protocol. The governing technical behavior is: BFD exchanges lightweight control packets to test bidirectional forwarding paths and can notify registered clients such as routing processes; it is not itself a route-distribution protocol or a guarantee of link-physical failure.

Incorrect Answers

A:

This option proposes: Explain the DIS role on broadcast IS-IS circuits and why it differs from an OSPF DR/BDR election. It addresses the different topic IS-IS designated intermediate system and pseudonode, not the directly tested BFD rapid session detection and routing protocol association failure in the stated incident (A core uplink remains electrically up after its optical path becomes unidirectional, and OSPF neighbors do not declare failure quickly enough for application targets.).

B:

This option proposes: Analyze Virtual Router Redundancy Protocol master election using priorities and the virtual router ID instead of a router's physical interface address alone. It addresses the different topic VRRP master election priority and tie breaks, not the directly tested BFD rapid session detection and routing protocol association failure in the stated incident (A core uplink remains electrically up after its optical path becomes unidirectional, and OSPF neighbors do not declare failure quickly enough for application targets.).

C:

This option proposes: Check VRRP virtual IP and virtual MAC behavior while troubleshooting hosts that retain a stale default-gateway neighbor entry after failover. It addresses the different topic VRRP virtual MAC and endpoint ARP continuity, not the directly tested BFD rapid session detection and routing protocol association failure in the stated incident (A core uplink remains electrically up after its optical path becomes unidirectional, and OSPF neighbors do not declare failure quickly enough for application targets.).

Question 494

An enterprise networking reviewer examines this Huawei Datacom situation. A core uplink remains electrically up after its optical path becomes unidirectional, and OSPF neighbors do not declare failure quickly enough for application targets. A colleague proposes this action: Use Bidirectional Forwarding Detection to provide rapid validated failure indications to a supported routing or redundancy protocol. Which protocol principle BEST supports that proposal? Select ONE best answer.

  1. VRRP provides a shared virtual default-gateway identity, generally electing a higher-priority router as master while tie-breaking rules and address-owner behavior are relevant; hosts use the virtual address rather than the physical router selected by a static setting.
  2. In controller-managed WLANs an AP typically discovers and establishes control communication with the AC using CAPWAP, while local or centralized data forwarding depends on the chosen design and correct VLAN mapping.
  3. BFD exchanges lightweight control packets to test bidirectional forwarding paths and can notify registered clients such as routing processes; it is not itself a route-distribution protocol or a guarantee of link-physical failure.
  4. BFD failure detection depends on negotiated receive intervals and a multiplier, so unrealistically aggressive values can cause transient congestion or scheduler delays to trigger unnecessary session-down events.

Explanation

Correct Answer

C:

The relevant protocol behavior is: BFD exchanges lightweight control packets to test bidirectional forwarding paths and can notify registered clients such as routing processes; it is not itself a route-distribution protocol or a guarantee of link-physical failure. In the stated scenario (A core uplink remains electrically up after its optical path becomes unidirectional, and OSPF neighbors do not declare failure quickly enough for application targets.) this supports the controlled action: Use Bidirectional Forwarding Detection to provide rapid validated failure indications to a supported routing or redundancy protocol.

Incorrect Answers

A:

This option proposes: VRRP provides a shared virtual default-gateway identity, generally electing a higher-priority router as master while tie-breaking rules and address-owner behavior are relevant; hosts use the virtual address rather than the physical router selected by a static setting. It addresses the different topic VRRP master election priority and tie breaks, not the directly tested BFD rapid session detection and routing protocol association failure in the stated incident (A core uplink remains electrically up after its optical path becomes unidirectional, and OSPF neighbors do not declare failure quickly enough for application targets.).

B:

This option proposes: In controller-managed WLANs an AP typically discovers and establishes control communication with the AC using CAPWAP, while local or centralized data forwarding depends on the chosen design and correct VLAN mapping. It addresses the different topic Large campus WLAN AC AP and CAPWAP architecture, not the directly tested BFD rapid session detection and routing protocol association failure in the stated incident (A core uplink remains electrically up after its optical path becomes unidirectional, and OSPF neighbors do not declare failure quickly enough for application targets.).

D:

This option proposes: BFD failure detection depends on negotiated receive intervals and a multiplier, so unrealistically aggressive values can cause transient congestion or scheduler delays to trigger unnecessary session-down events. It addresses the different topic BFD detection multiplier and negotiated timers, not the directly tested BFD rapid session detection and routing protocol association failure in the stated incident (A core uplink remains electrically up after its optical path becomes unidirectional, and OSPF neighbors do not declare failure quickly enough for application targets.).

Question 495

A Huawei network troubleshooter needs objective evidence for this case: A core uplink remains electrically up after its optical path becomes unidirectional, and OSPF neighbors do not declare failure quickly enough for application targets. Which diagnostic check MOST DIRECTLY distinguishes the relevant problem? Select ONE best answer.

  1. Review the monitored uplink state, tracked priority decrement, master/backup advertisements, preemption settings and return-path reachability.
  2. Inspect local and remote BFD configured minima, actual negotiated intervals, multiplier values, CPU pressure and observed detection timestamps.
  3. Inspect BFD discriminator and session state, timer negotiations, neighbor addresses, routing protocol binding and actual packet-loss observations.
  4. Compare RP reachability, (*,G) and (S,G) state, PIM join or register messages and RPF interfaces before changing the multicast design.

Explanation

Correct Answer

C:

The discriminating diagnostic check is: Inspect BFD discriminator and session state, timer negotiations, neighbor addresses, routing protocol binding and actual packet-loss observations. In this incident (A core uplink remains electrically up after its optical path becomes unidirectional, and OSPF neighbors do not declare failure quickly enough for application targets.) the desired evidence-led outcome is: The intended routing process responds to a verified forwarding failure in the designed interval without false mass failovers from aggressive unsupported timing.

Incorrect Answers

A:

This option proposes: Review the monitored uplink state, tracked priority decrement, master/backup advertisements, preemption settings and return-path reachability. It addresses the different topic VRRP interface tracking and controlled preemption, not the directly tested BFD rapid session detection and routing protocol association failure in the stated incident (A core uplink remains electrically up after its optical path becomes unidirectional, and OSPF neighbors do not declare failure quickly enough for application targets.).

B:

This option proposes: Inspect local and remote BFD configured minima, actual negotiated intervals, multiplier values, CPU pressure and observed detection timestamps. It addresses the different topic BFD detection multiplier and negotiated timers, not the directly tested BFD rapid session detection and routing protocol association failure in the stated incident (A core uplink remains electrically up after its optical path becomes unidirectional, and OSPF neighbors do not declare failure quickly enough for application targets.).

D:

This option proposes: Compare RP reachability, (*,G) and (S,G) state, PIM join or register messages and RPF interfaces before changing the multicast design. It addresses the different topic PIM sparse mode RP shared tree and shortest path transition, not the directly tested BFD rapid session detection and routing protocol association failure in the stated incident (A core uplink remains electrically up after its optical path becomes unidirectional, and OSPF neighbors do not declare failure quickly enough for application targets.).

Question 496

A network operator evaluates the result of a planned remediation. A core uplink remains electrically up after its optical path becomes unidirectional, and OSPF neighbors do not declare failure quickly enough for application targets. The validation is: Inspect BFD discriminator and session state, timer negotiations, neighbor addresses, routing protocol binding and actual packet-loss observations. Which outcome BEST establishes success? Select ONE best answer.

  1. Default-gateway mastership moves to a router with working upstream connectivity and recovers predictably after restoration.
  2. Hosts continue using the same logical default gateway through a master change and L2 learning converges to the correct uplink.
  3. The intended routing process responds to a verified forwarding failure in the designed interval without false mass failovers from aggressive unsupported timing.
  4. Expected branches receive reflected routes without creating an iBGP routing loop or relying on an impractical full mesh.

Explanation

Correct Answer

C:

That follows from the targeted action: Use Bidirectional Forwarding Detection to provide rapid validated failure indications to a supported routing or redundancy protocol.

Incorrect Answers

A:

That option concerns VRRP interface tracking and controlled preemption. That follows from the targeted action: Use Bidirectional Forwarding Detection to provide rapid validated failure indications to a supported routing or redundancy protocol.

B:

That option concerns VRRP virtual MAC and endpoint ARP continuity. That follows from the targeted action: Use Bidirectional Forwarding Detection to provide rapid validated failure indications to a supported routing or redundancy protocol.

D:

That option concerns BGP route reflector and cluster loop prevention. That follows from the targeted action: Use Bidirectional Forwarding Detection to provide rapid validated failure indications to a supported routing or redundancy protocol.

Question 497

A network change-review team evaluates this Huawei Datacom incident. A core uplink remains electrically up after its optical path becomes unidirectional, and OSPF neighbors do not declare failure quickly enough for application targets. Which THREE choices provide the most relevant correction, diagnostic verification and measurable success criterion? Select THREE answers.

  1. Use Bidirectional Forwarding Detection to provide rapid validated failure indications to a supported routing or redundancy protocol.
  2. Inspect BFD discriminator and session state, timer negotiations, neighbor addresses, routing protocol binding and actual packet-loss observations.
  3. Compare host ARP for the virtual gateway, advertised VRRP virtual MAC, switch forwarding table, master state and test traffic during takeover.
  4. The intended routing process responds to a verified forwarding failure in the designed interval without false mass failovers from aggressive unsupported timing.
  5. Assess fast roaming within and between AP coverage cells using the configured mobility relationship and authentication requirements.
  6. Analyze BGP best-path choices in a specified platform and release before deciding that the shortest AS_PATH alone always wins.

Explanation

Correct Answers

A:

The case-specific corrective step is: Use Bidirectional Forwarding Detection to provide rapid validated failure indications to a supported routing or redundancy protocol. The governing technical behavior is: BFD exchanges lightweight control packets to test bidirectional forwarding paths and can notify registered clients such as routing processes; it is not itself a route-distribution protocol or a guarantee of link-physical failure. Verify the solution through: Inspect BFD discriminator and session state, timer negotiations, neighbor addresses, routing protocol binding and actual packet-loss observations.

B:

The discriminating diagnostic check is: Inspect BFD discriminator and session state, timer negotiations, neighbor addresses, routing protocol binding and actual packet-loss observations.

D:

Confirm it using: Inspect BFD discriminator and session state, timer negotiations, neighbor addresses, routing protocol binding and actual packet-loss observations.

Incorrect Answers

C:

This option proposes: Compare host ARP for the virtual gateway, advertised VRRP virtual MAC, switch forwarding table, master state and test traffic during takeover. It addresses the different topic VRRP virtual MAC and endpoint ARP continuity, not the directly tested BFD rapid session detection and routing protocol association failure in the stated incident (A core uplink remains electrically up after its optical path becomes unidirectional, and OSPF neighbors do not declare failure quickly enough for application targets.).

E:

This option proposes: Assess fast roaming within and between AP coverage cells using the configured mobility relationship and authentication requirements. It addresses the different topic Wireless roaming mobility and session continuity, not the directly tested BFD rapid session detection and routing protocol association failure in the stated incident (A core uplink remains electrically up after its optical path becomes unidirectional, and OSPF neighbors do not declare failure quickly enough for application targets.).

F:

This option proposes: Analyze BGP best-path choices in a specified platform and release before deciding that the shortest AS_PATH alone always wins. It addresses the different topic BGP route preference sequence and policy precedence, not the directly tested BFD rapid session detection and routing protocol association failure in the stated incident (A core uplink remains electrically up after its optical path becomes unidirectional, and OSPF neighbors do not declare failure quickly enough for application targets.).

Question 498

A Huawei HCIP-Datacom engineer investigates the following network fault: An operator adds a BFD peer session on a new WAN circuit but the associated BGP route stays active after a tested BFD failure because the protocol binding was omitted. Which corrective action should be prioritized on the stated facts? Select ONE best answer.

  1. Use Bidirectional Forwarding Detection to provide rapid validated failure indications to a supported routing or redundancy protocol.
  2. Distinguish level-1 area routing from level-2 backbone-style interarea routing when troubleshooting a missing destination.
  3. Calculate or verify the practical failure-detection threshold from BFD transmit intervals, advertised receive intervals and the detect multiplier.
  4. Configure VRRP priority tracking with suitable preemption behavior so loss of upstream connectivity changes the preferred gateway.

Explanation

Correct Answer

A:

The case-specific corrective step is: Use Bidirectional Forwarding Detection to provide rapid validated failure indications to a supported routing or redundancy protocol.

Incorrect Answers

B:

This option proposes: Distinguish level-1 area routing from level-2 backbone-style interarea routing when troubleshooting a missing destination. It addresses the different topic IS-IS level one versus level two reachability, not the directly tested BFD rapid session detection and routing protocol association failure in the stated incident (An operator adds a BFD peer session on a new WAN circuit but the associated BGP route stays active after a tested BFD failure because the protocol binding was omitted.).

C:

This option proposes: Calculate or verify the practical failure-detection threshold from BFD transmit intervals, advertised receive intervals and the detect multiplier. It addresses the different topic BFD detection multiplier and negotiated timers, not the directly tested BFD rapid session detection and routing protocol association failure in the stated incident (An operator adds a BFD peer session on a new WAN circuit but the associated BGP route stays active after a tested BFD failure because the protocol binding was omitted.).

D:

This option proposes: Configure VRRP priority tracking with suitable preemption behavior so loss of upstream connectivity changes the preferred gateway. It addresses the different topic VRRP interface tracking and controlled preemption, not the directly tested BFD rapid session detection and routing protocol association failure in the stated incident (An operator adds a BFD peer session on a new WAN circuit but the associated BGP route stays active after a tested BFD failure because the protocol binding was omitted.).

Question 499

An enterprise networking reviewer examines this Huawei Datacom situation. An operator adds a BFD peer session on a new WAN circuit but the associated BGP route stays active after a tested BFD failure because the protocol binding was omitted. A colleague proposes this action: Use Bidirectional Forwarding Detection to provide rapid validated failure indications to a supported routing or redundancy protocol. Which protocol principle BEST supports that proposal? Select ONE best answer.

  1. BFD failure detection depends on negotiated receive intervals and a multiplier, so unrealistically aggressive values can cause transient congestion or scheduler delays to trigger unnecessary session-down events.
  2. BFD exchanges lightweight control packets to test bidirectional forwarding paths and can notify registered clients such as routing processes; it is not itself a route-distribution protocol or a guarantee of link-physical failure.
  3. VRRP uses a virtual router identity and virtual MAC per IPv4 group to preserve a stable next-hop identity across master changes; correct failover still requires matching VLAN, neighbor learning and eligible router state.
  4. DHCP clients initially discover servers using local broadcasts, which are not ordinarily routed; a DHCP relay supplies an appropriate relay address and forwards requests so the server can select the correct address pool.

Explanation

Correct Answer

B:

The relevant protocol behavior is: BFD exchanges lightweight control packets to test bidirectional forwarding paths and can notify registered clients such as routing processes; it is not itself a route-distribution protocol or a guarantee of link-physical failure. In the stated scenario (An operator adds a BFD peer session on a new WAN circuit but the associated BGP route stays active after a tested BFD failure because the protocol binding was omitted.) this supports the controlled action: Use Bidirectional Forwarding Detection to provide rapid validated failure indications to a supported routing or redundancy protocol.

Incorrect Answers

A:

This option proposes: BFD failure detection depends on negotiated receive intervals and a multiplier, so unrealistically aggressive values can cause transient congestion or scheduler delays to trigger unnecessary session-down events. It addresses the different topic BFD detection multiplier and negotiated timers, not the directly tested BFD rapid session detection and routing protocol association failure in the stated incident (An operator adds a BFD peer session on a new WAN circuit but the associated BGP route stays active after a tested BFD failure because the protocol binding was omitted.).

C:

This option proposes: VRRP uses a virtual router identity and virtual MAC per IPv4 group to preserve a stable next-hop identity across master changes; correct failover still requires matching VLAN, neighbor learning and eligible router state. It addresses the different topic VRRP virtual MAC and endpoint ARP continuity, not the directly tested BFD rapid session detection and routing protocol association failure in the stated incident (An operator adds a BFD peer session on a new WAN circuit but the associated BGP route stays active after a tested BFD failure because the protocol binding was omitted.).

D:

This option proposes: DHCP clients initially discover servers using local broadcasts, which are not ordinarily routed; a DHCP relay supplies an appropriate relay address and forwards requests so the server can select the correct address pool. It addresses the different topic DHCP relay across a routed user VLAN, not the directly tested BFD rapid session detection and routing protocol association failure in the stated incident (An operator adds a BFD peer session on a new WAN circuit but the associated BGP route stays active after a tested BFD failure because the protocol binding was omitted.).

Question 500

A Huawei network troubleshooter needs objective evidence for this case: An operator adds a BFD peer session on a new WAN circuit but the associated BGP route stays active after a tested BFD failure because the protocol binding was omitted. Which diagnostic check MOST DIRECTLY distinguishes the relevant problem? Select ONE best answer.

  1. Inspect local and remote BFD configured minima, actual negotiated intervals, multiplier values, CPU pressure and observed detection timestamps.
  2. Review VLAN IGMP query source, version, group reports, membership timers and the downstream interface in multicast routing state.
  3. Inspect BFD discriminator and session state, timer negotiations, neighbor addresses, routing protocol binding and actual packet-loss observations.
  4. Compare host ARP for the virtual gateway, advertised VRRP virtual MAC, switch forwarding table, master state and test traffic during takeover.

Explanation

Correct Answer

C:

The discriminating diagnostic check is: Inspect BFD discriminator and session state, timer negotiations, neighbor addresses, routing protocol binding and actual packet-loss observations. In this incident (An operator adds a BFD peer session on a new WAN circuit but the associated BGP route stays active after a tested BFD failure because the protocol binding was omitted.) the desired evidence-led outcome is: The intended routing process responds to a verified forwarding failure in the designed interval without false mass failovers from aggressive unsupported timing.

Incorrect Answers

A:

This option proposes: Inspect local and remote BFD configured minima, actual negotiated intervals, multiplier values, CPU pressure and observed detection timestamps. It addresses the different topic BFD detection multiplier and negotiated timers, not the directly tested BFD rapid session detection and routing protocol association failure in the stated incident (An operator adds a BFD peer session on a new WAN circuit but the associated BGP route stays active after a tested BFD failure because the protocol binding was omitted.).

B:

This option proposes: Review VLAN IGMP query source, version, group reports, membership timers and the downstream interface in multicast routing state. It addresses the different topic IGMP querier membership reports and group timeout, not the directly tested BFD rapid session detection and routing protocol association failure in the stated incident (An operator adds a BFD peer session on a new WAN circuit but the associated BGP route stays active after a tested BFD failure because the protocol binding was omitted.).

D:

This option proposes: Compare host ARP for the virtual gateway, advertised VRRP virtual MAC, switch forwarding table, master state and test traffic during takeover. It addresses the different topic VRRP virtual MAC and endpoint ARP continuity, not the directly tested BFD rapid session detection and routing protocol association failure in the stated incident (An operator adds a BFD peer session on a new WAN circuit but the associated BGP route stays active after a tested BFD failure because the protocol binding was omitted.).

HCIP-Datacom-Core Technology V1.0 (H12-821) Practice Tests