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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 78

Question 770

A Junos network engineer takes this step: Map the tenant's bridge domain to a consistent VXLAN network identifier on both VTEPs. Which outcome most directly follows?

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

Explanation

Correct Answer

B:

This is the direct result of the VXLAN VNI mapping decision: The Layer 2 service can be carried through VXLAN tunnels over a routed IP underlay.

Incorrect Answers

A:

This outcome is associated with All-active EVPN multihoming (Enable a supported all-active EVPN multihoming service with appropriate link aggregation.), not the specified action.

C:

This outcome is associated with EVPN designated forwarder (Use EVPN designated-forwarder election for the relevant Ethernet segment and service.), 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 771

A tenant's Layer 2 broadcast domain must extend between two IP-connected data centers without extending its original physical VLAN trunks. A colleague instead suggests: Encapsulate the tenant Ethernet frame in VXLAN over UDP/IP at the source VTEP. Which corrective approach most directly addresses the original issue?

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

Explanation

Correct Answer

C:

This corrective choice addresses VXLAN VNI mapping. The Layer 2 service can be carried through VXLAN tunnels over a routed IP underlay.

Incorrect Answers

A:

That alternative applies to All-active EVPN multihoming instead. Both active attachment links can participate in forwarding under the supported design.

B:

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

D:

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

Question 772

An enterprise network designer recommends: Map the tenant's bridge domain to a consistent VXLAN network identifier on both VTEPs. 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 dual-homed host should use both available EVPN PE links for normal forwarding rather than reserve one solely for standby.
  4. A tenant's Layer 2 broadcast domain must extend between two IP-connected data centers without extending its original physical VLAN trunks.

Explanation

Correct Answer

D:

This case requires the VXLAN VNI mapping action. The Layer 2 service can be carried through VXLAN tunnels over a routed IP underlay.

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 Enable a supported all-active EVPN multihoming service with appropriate link aggregation. Both active attachment links can participate in forwarding under the supported design.

Question 773

Two VTEPs exchange EVPN routes but fail to carry VXLAN frames because the remote tunnel endpoint IP is unreachable. Which Junos networking action or protocol decision best addresses this requirement?

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

Explanation

Correct Answer

C:

This action addresses VTEP underlay reachability. Encapsulated VXLAN traffic can traverse the routed fabric to the remote endpoint.

Incorrect Answers

A:

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 VTEP underlay reachability requirement.

B:

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 VTEP underlay reachability 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 VTEP underlay reachability requirement.

Question 774

A Junos network engineer takes this step: Restore IP underlay routing connectivity between the VTEP tunnel endpoint addresses. Which outcome most directly follows?

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

Explanation

Correct Answer

D:

This is the direct result of the VTEP underlay reachability decision: Encapsulated VXLAN traffic can traverse the routed fabric to the remote endpoint.

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

C:

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

Question 775

Two VTEPs exchange EVPN routes but fail to carry VXLAN frames because the remote tunnel endpoint IP is unreachable. A colleague instead suggests: Use a consistent ESI-based LAG multihoming configuration on the two leaf switches. Which corrective approach most directly addresses the original issue?

  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 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

A:

This corrective choice addresses VTEP underlay reachability. Encapsulated VXLAN traffic can traverse the routed fabric to the remote endpoint.

Incorrect Answers

B:

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

C:

That alternative applies to EVPN ESI LAG redundancy instead. The attached segment can retain forwarding through another multihoming peer if one leaf fails.

D:

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.

Question 776

An enterprise network designer recommends: Restore IP underlay routing connectivity between the VTEP tunnel endpoint addresses. Which situation most clearly calls for this action?

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

Explanation

Correct Answer

B:

This case requires the VTEP underlay reachability action. Encapsulated VXLAN traffic can traverse the routed fabric to the remote endpoint.

Incorrect Answers

A:

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.

C:

This other case would be better matched to Use a consistent ESI-based LAG multihoming configuration on the two leaf switches. The attached segment can retain forwarding through another multihoming peer if one leaf fails.

D:

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.

Question 777

A virtual server generates an Ethernet frame that must cross a Layer 3 spine-leaf underlay to reach another leaf. Which Junos networking action or protocol decision best addresses this requirement?

  1. Map the tenant's bridge domain to a consistent VXLAN network identifier on both VTEPs.
  2. Encapsulate the tenant Ethernet frame in VXLAN over UDP/IP at the source VTEP.
  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

B:

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

Incorrect Answers

A:

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 VXLAN transport encapsulation requirement.

C:

That action targets All-active EVPN multihoming: Both active attachment links can participate in forwarding under the supported design. It does not directly resolve the stated VXLAN transport encapsulation requirement.

D:

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 VXLAN transport encapsulation requirement.

Question 778

A Junos network engineer takes this step: Encapsulate the tenant Ethernet frame in VXLAN over UDP/IP at the source VTEP. Which outcome most directly follows?

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

Explanation

Correct Answer

C:

This is the direct result of the VXLAN transport encapsulation decision: The routed IP fabric can transport tenant Layer 2 traffic between VTEPs.

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.

B:

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 All-active EVPN multihoming (Enable a supported all-active EVPN multihoming service with appropriate link aggregation.), not the specified action.

Question 779

A virtual server generates an Ethernet frame that must cross a Layer 3 spine-leaf underlay to reach another leaf. A colleague instead suggests: Enable a supported all-active EVPN multihoming service with appropriate link aggregation. Which corrective approach most directly addresses the original issue?

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

Explanation

Correct Answer

D:

This corrective choice addresses VXLAN transport encapsulation. The routed IP fabric can transport tenant Layer 2 traffic between VTEPs.

Incorrect Answers

A:

That alternative applies to All-active EVPN multihoming instead. Both active attachment links can participate in forwarding under the supported design.

B:

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

C:

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

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.

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