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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 79

Question 780

An enterprise network designer recommends: Encapsulate the tenant Ethernet frame in VXLAN over UDP/IP at the source VTEP. Which situation most clearly calls for this action?

  1. A virtual server generates an Ethernet frame that must cross a Layer 3 spine-leaf underlay to reach another leaf.
  2. A dual-homed host should use both available EVPN PE links for normal forwarding rather than reserve one solely for standby.
  3. A tenant's Layer 2 broadcast domain must extend between two IP-connected data centers without extending its original physical VLAN trunks.
  4. A multihomed segment risks duplicate delivery of flooded broadcast frames from both provider edge routers.

Explanation

Correct Answer

A:

This case requires the VXLAN transport encapsulation action. The routed IP fabric can transport tenant Layer 2 traffic between VTEPs.

Incorrect Answers

B:

This other case would be better matched to Enable a supported all-active EVPN multihoming service with appropriate link aggregation. Both active attachment links can participate in forwarding under the supported design.

C:

This other case would be better matched to Map the tenant's bridge domain to a consistent VXLAN network identifier on both VTEPs. The Layer 2 service can be carried through VXLAN tunnels over a routed IP underlay.

D:

This other case would be better matched to Use EVPN designated-forwarder election for the relevant Ethernet segment and service. BUM traffic toward the segment can be controlled so redundant peers avoid duplicate delivery.

Question 781

A server is attached by an Ethernet segment to two EVPN leaf switches and requires supported all-active multihomed access. Which Junos networking action or protocol decision best addresses this requirement?

  1. Configure a supported shared anycast VTEP address and multihoming routing design.
  2. Restore IP underlay routing connectivity between the VTEP tunnel endpoint addresses.
  3. Use a consistent ESI-based LAG multihoming configuration on the two leaf switches.
  4. Use an approved BUM replication design informed by EVPN membership signaling.

Explanation

Correct Answer

C:

This action addresses EVPN ESI LAG redundancy. The attached segment can retain forwarding through another multihoming peer if one leaf fails.

Incorrect Answers

A:

That action targets Anycast VTEP next hop: Remote VTEPs can use one logical tunnel next hop while underlay ECMP distributes traffic. It does not directly resolve the stated EVPN ESI LAG redundancy requirement.

B:

That action targets VTEP underlay reachability: Encapsulated VXLAN traffic can traverse the routed fabric to the remote endpoint. It does not directly resolve the stated EVPN ESI LAG redundancy requirement.

D:

That action targets EVPN VXLAN BUM replication: Broadcast and unknown-unicast traffic can reach eligible VTEPs even without a specific learned unicast destination. It does not directly resolve the stated EVPN ESI LAG redundancy requirement.

Question 782

A Junos network engineer takes this step: Use a consistent ESI-based LAG multihoming configuration on the two leaf switches. Which outcome most directly follows?

  1. Encapsulated VXLAN traffic can traverse the routed fabric to the remote endpoint.
  2. Remote VTEPs can use one logical tunnel next hop while underlay ECMP distributes traffic.
  3. Broadcast and unknown-unicast traffic can reach eligible VTEPs even without a specific learned unicast destination.
  4. The attached segment can retain forwarding through another multihoming peer if one leaf fails.

Explanation

Correct Answer

D:

This is the direct result of the EVPN ESI LAG redundancy decision: The attached segment can retain forwarding through another multihoming peer if one leaf fails.

Incorrect Answers

A:

This outcome is associated with VTEP underlay reachability (Restore IP underlay routing connectivity between the VTEP tunnel endpoint addresses.), not the specified action.

B:

This outcome is associated with Anycast VTEP next hop (Configure a supported shared anycast VTEP address and multihoming routing design.), not the specified action.

C:

This outcome is associated with EVPN VXLAN BUM replication (Use an approved BUM replication design informed by EVPN membership signaling.), not the specified action.

Question 783

A server is attached by an Ethernet segment to two EVPN leaf switches and requires supported all-active multihomed access. A colleague instead suggests: Configure a supported shared anycast VTEP address and multihoming routing design. Which corrective approach most directly addresses the original issue?

  1. Use a consistent ESI-based LAG multihoming configuration on the two leaf switches.
  2. Use an approved BUM replication design informed by EVPN membership signaling.
  3. Restore IP underlay routing connectivity between the VTEP tunnel endpoint addresses.
  4. Configure a supported shared anycast VTEP address and multihoming routing design.

Explanation

Correct Answer

A:

This corrective choice addresses EVPN ESI LAG redundancy. The attached segment can retain forwarding through another multihoming peer if one leaf fails.

Incorrect Answers

B:

That alternative applies to EVPN VXLAN BUM replication instead. Broadcast and unknown-unicast traffic can reach eligible VTEPs even without a specific learned unicast destination.

C:

That alternative applies to VTEP underlay reachability instead. Encapsulated VXLAN traffic can traverse the routed fabric to the remote endpoint.

D:

That alternative applies to Anycast VTEP next hop instead. Remote VTEPs can use one logical tunnel next hop while underlay ECMP distributes traffic.

Question 784

An enterprise network designer recommends: Use a consistent ESI-based LAG multihoming configuration on the two leaf switches. Which situation most clearly calls for this action?

  1. Two VTEPs exchange EVPN routes but fail to carry VXLAN frames because the remote tunnel endpoint IP is unreachable.
  2. A server is attached by an Ethernet segment to two EVPN leaf switches and requires supported all-active multihomed access.
  3. Two EVPN multihoming peers must appear as one remote tunnel destination while still using resilient underlay forwarding.
  4. A VXLAN tenant sends broadcast ARP across multiple remote VTEPs but only one known-unicast host route is installed.

Explanation

Correct Answer

B:

This case requires the EVPN ESI LAG redundancy action. The attached segment can retain forwarding through another multihoming peer if one leaf fails.

Incorrect Answers

A:

This other case would be better matched to Restore IP underlay routing connectivity between the VTEP tunnel endpoint addresses. Encapsulated VXLAN traffic can traverse the routed fabric to the remote endpoint.

C:

This other case would be better matched to Configure a supported shared anycast VTEP address and multihoming routing design. Remote VTEPs can use one logical tunnel next hop while underlay ECMP distributes traffic.

D:

This other case would be better matched to Use an approved BUM replication design informed by EVPN membership signaling. Broadcast and unknown-unicast traffic can reach eligible VTEPs even without a specific learned unicast destination.

Question 785

A dual-homed host should use both available EVPN PE links for normal forwarding rather than reserve one solely for standby. Which Junos networking action or protocol decision best addresses this requirement?

  1. Enable a supported all-active EVPN multihoming service with appropriate link aggregation.
  2. Encapsulate the tenant Ethernet frame in VXLAN over UDP/IP at the source VTEP.
  3. Use EVPN designated-forwarder election for the relevant Ethernet segment and service.
  4. Map the tenant's bridge domain to a consistent VXLAN network identifier on both VTEPs.

Explanation

Correct Answer

A:

This action addresses All-active EVPN multihoming. Both active attachment links can participate in forwarding under the supported design.

Incorrect Answers

B:

That action targets VXLAN transport encapsulation: The routed IP fabric can transport tenant Layer 2 traffic between VTEPs. It does not directly resolve the stated All-active EVPN multihoming requirement.

C:

That action targets EVPN designated forwarder: BUM traffic toward the segment can be controlled so redundant peers avoid duplicate delivery. It does not directly resolve the stated All-active EVPN multihoming requirement.

D:

That action targets VXLAN VNI mapping: The Layer 2 service can be carried through VXLAN tunnels over a routed IP underlay. It does not directly resolve the stated All-active EVPN multihoming requirement.

Question 786

A Junos network engineer takes this step: Enable a supported all-active EVPN multihoming service with appropriate link aggregation. Which outcome most directly follows?

  1. BUM traffic toward the segment can be controlled so redundant peers avoid duplicate delivery.
  2. Both active attachment links can participate in forwarding under the supported design.
  3. The Layer 2 service can be carried through VXLAN tunnels over a routed IP underlay.
  4. The routed IP fabric can transport tenant Layer 2 traffic between VTEPs.

Explanation

Correct Answer

B:

This is the direct result of the All-active EVPN multihoming decision: Both active attachment links can participate in forwarding under the supported design.

Incorrect Answers

A:

This outcome is associated with EVPN designated forwarder (Use EVPN designated-forwarder election for the relevant Ethernet segment and service.), not the specified action.

C:

This outcome is associated with VXLAN VNI mapping (Map the tenant's bridge domain to a consistent VXLAN network identifier on both VTEPs.), not the specified action.

D:

This outcome is associated with VXLAN transport encapsulation (Encapsulate the tenant Ethernet frame in VXLAN over UDP/IP at the source VTEP.), not the specified action.

Question 787

A dual-homed host should use both available EVPN PE links for normal forwarding rather than reserve one solely for standby. A colleague instead suggests: Use EVPN designated-forwarder election for the relevant Ethernet segment and service. Which corrective approach most directly addresses the original issue?

  1. Encapsulate the tenant Ethernet frame in VXLAN over UDP/IP at the source VTEP.
  2. Map the tenant's bridge domain to a consistent VXLAN network identifier on both VTEPs.
  3. Enable a supported all-active EVPN multihoming service with appropriate link aggregation.
  4. Use EVPN designated-forwarder election for the relevant Ethernet segment and service.

Explanation

Correct Answer

C:

This corrective choice addresses All-active EVPN multihoming. Both active attachment links can participate in forwarding under the supported design.

Incorrect Answers

A:

That alternative applies to VXLAN transport encapsulation instead. The routed IP fabric can transport tenant Layer 2 traffic between VTEPs.

B:

That alternative applies to VXLAN VNI mapping instead. The Layer 2 service can be carried through VXLAN tunnels over a routed IP underlay.

D:

That alternative applies to EVPN designated forwarder instead. BUM traffic toward the segment can be controlled so redundant peers avoid duplicate delivery.

Question 788

An enterprise network designer recommends: Enable a supported all-active EVPN multihoming service with appropriate link aggregation. Which situation most clearly calls for this action?

  1. A multihomed segment risks duplicate delivery of flooded broadcast frames from both provider edge routers.
  2. A virtual server generates an Ethernet frame that must cross a Layer 3 spine-leaf underlay to reach another leaf.
  3. A tenant's Layer 2 broadcast domain must extend between two IP-connected data centers without extending its original physical VLAN trunks.
  4. A dual-homed host should use both available EVPN PE links for normal forwarding rather than reserve one solely for standby.

Explanation

Correct Answer

D:

This case requires the All-active EVPN multihoming action. Both active attachment links can participate in forwarding under the supported design.

Incorrect Answers

A:

This other case would be better matched to Use EVPN designated-forwarder election for the relevant Ethernet segment and service. BUM traffic toward the segment can be controlled so redundant peers avoid duplicate delivery.

B:

This other case would be better matched to Encapsulate the tenant Ethernet frame in VXLAN over UDP/IP at the source VTEP. The routed IP fabric can transport tenant Layer 2 traffic between VTEPs.

C:

This other case would be better matched to Map the tenant's bridge domain to a consistent VXLAN network identifier on both VTEPs. The Layer 2 service can be carried through VXLAN tunnels over a routed IP underlay.

Question 789

Two EVPN multihoming peers must appear as one remote tunnel destination while still using resilient underlay forwarding. Which Junos networking action or protocol decision best addresses this requirement?

  1. Restore IP underlay routing connectivity between the VTEP tunnel endpoint addresses.
  2. Configure a supported shared anycast VTEP address and multihoming routing design.
  3. Use an approved BUM replication design informed by EVPN membership signaling.
  4. Use a consistent ESI-based LAG multihoming configuration on the two leaf switches.

Explanation

Correct Answer

B:

This action addresses Anycast VTEP next hop. Remote VTEPs can use one logical tunnel next hop while underlay ECMP distributes traffic.

Incorrect Answers

A:

That action targets VTEP underlay reachability: Encapsulated VXLAN traffic can traverse the routed fabric to the remote endpoint. It does not directly resolve the stated Anycast VTEP next hop requirement.

C:

That action targets EVPN VXLAN BUM replication: Broadcast and unknown-unicast traffic can reach eligible VTEPs even without a specific learned unicast destination. It does not directly resolve the stated Anycast VTEP next hop requirement.

D:

That action targets EVPN ESI LAG redundancy: The attached segment can retain forwarding through another multihoming peer if one leaf fails. It does not directly resolve the stated Anycast VTEP next hop requirement.

Question 790

A Junos network engineer takes this step: Configure a supported shared anycast VTEP address and multihoming routing design. Which outcome most directly follows?

  1. The attached segment can retain forwarding through another multihoming peer if one leaf fails.
  2. Encapsulated VXLAN traffic can traverse the routed fabric to the remote endpoint.
  3. Remote VTEPs can use one logical tunnel next hop while underlay ECMP distributes traffic.
  4. Broadcast and unknown-unicast traffic can reach eligible VTEPs even without a specific learned unicast destination.

Explanation

Correct Answer

C:

This is the direct result of the Anycast VTEP next hop decision: Remote VTEPs can use one logical tunnel next hop while underlay ECMP distributes traffic.

Incorrect Answers

A:

This outcome is associated with EVPN ESI LAG redundancy (Use a consistent ESI-based LAG multihoming configuration on the two leaf switches.), not the specified action.

B:

This outcome is associated with VTEP underlay reachability (Restore IP underlay routing connectivity between the VTEP tunnel endpoint addresses.), not the specified action.

D:

This outcome is associated with EVPN VXLAN BUM replication (Use an approved BUM replication design informed by EVPN membership signaling.), not the specified action.

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