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| Certification Vendor: | Juniper |
|---|---|
| Exam Name: | Data Center, Professional (JNCIP-DC) |
| Exam Number: | JN0-683 |
| Exam Price: | $400 USD |
| Exam Format: | Multiple-choice |
| Real Exam Qty: | 65 |
| Certificate Validity Period: | 3 years |
| Related Certifications: | Juniper Networks Certified Professional Data Center (JNCIP-DC) |
| Passing Score: | Scaled (Approx. 650/1000) |
| Exam Duration: | 90 minutes |
| Available Languages: | English |
| Sample Questions: | Juniper JN0-683 Sample Questions |
| Exam Way: | Online-proctored or Pearson VUE testing center |
| Pre Condition: | JNCIS-DC (JN0-481) is recommended/preferred. |
| Official Syllabus URL: | https://www.juniper.net/us/en/training/certification/tracks/data-center/jncip-dc.html |
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NEW QUESTION # 96
A customer has implemented an MX Series active/standby EVPN multihoming arrangement between six leaf devices. In this scenario, which statement is correct about the designated forwarder?
Answer: C
Explanation:
In an active/standby EVPN multihoming arrangement, the designated forwarder election results in exactly one leaf router being permitted to forward traffic for that Ethernet segment, while the other multihomed peers remain in standby to prevent duplicate forwarding.
NEW QUESTION # 97
Exhibit.
You are deploying a VXLAN overlay with EVPN as the control plane in an ERB architecture.
Referring to the exhibit, which three statements are correct about where the VXLAN gateways will be placed?
(Choose three.)
Answer: A,B,E
Explanation:
* Understanding ERB Architecture:
* ERB (Edge Routed Bridging) architecture is a network design where the routing occurs at the edge (leaf devices) rather than in the spine devices. In a VXLAN overlay network with EVPN as the control plane, leaf devices typically act as both Layer 2 (L2) and Layer 3 (L3) VXLAN gateways.
* Placement of VXLAN Gateways:
* Option B:All leaf devices will have L2 VXLAN gateways to handle the bridging of VLAN traffic into VXLAN tunnels.
* Option C:All leaf devices will also have L3 VXLAN gateways to route traffic between different VXLAN segments (VNIs) and external networks.
* Option E:Spine devices in an ERB architecture generally do not function as VXLAN gateways.
They primarily focus on forwarding traffic between leaf nodes and do not handle VXLAN encapsulation/decapsulation.
Conclusion:
* Option B:Correct-All leaf devices will have L2 VXLAN gateways.
* Option C:Correct-All leaf devices will have L3 VXLAN gateways.
* Option E:Correct-Spine devices will not act as VXLAN gateways
NEW QUESTION # 98
You are setting up an EVPN-VXLAN architecture for your new data center. Its initial deployment will be less than 50 switches; however, it could scale up to 250 switches over time supporting
1024 VLANs. You are still deciding whether to use symmetric or asymmetric routing.
In this scenario, which two statements are correct? (Choose two.)
Answer: A,B
Explanation:
Symmetric routing needs an extra VLAN with an IRB interface for each L3 VRF instance:
Symmetric routing requires an additional VLAN (and corresponding VNI) with an IRB interface for every Layer 3 VRF instance, supporting inter-VLAN routing at every VTEP.
Symmetric routing supports higher scaling numbers: Symmetric routing is preferred for environments with high scaling needs (such as 1024 VLANs and up to 250 switches) because it avoids the scalability limitations seen in asymmetric routing, which requires all VLANs and VNIs to be configured on every switch, leading to configuration complexity and overhead.
NEW QUESTION # 99
You are implementing seamless stitching between two data centers and have a proposed configuration for a border leaf device.
In this scenario, which two statements are correct? {Choose two.)
Answer: C,D
Explanation:
When implementing seamless VXLAN stitching between two data centers, the Ethernet Segment Identifier (ESI) must match in both data centers to ensure that the same multi-homed segment is recognized consistently across the environments. This allows seamless failover and redundancy. However, the translation VNI (Virtual Network Identifier) must be different in each data center because VXLAN stitching involves mapping different VNIs to enable interconnectivity between distinct VXLAN domains.
If the same translation VNI is used in both data centers, there would be no differentiation between network segments, leading to potential routing and forwarding issues. Keeping them different ensures proper traffic isolation and mapping.
NEW QUESTION # 100
Whatare two ways in which an EVPN-signaled VXLAN is different from a multicast-signaled VXLAN?
(Choose two.)
Answer: A,B
Explanation:
* Multicast-Signaled VXLAN:
* In traditional multicast-signaled VXLAN, VTEPs (VXLAN Tunnel Endpoints) use multicast to flood and learn about remote VTEPs. This method relies on multicast in the underlay network to distribute BUM (Broadcast, Unknown unicast, and Multicast) traffic.
* This approach can be resource-intensive due to the need for multicast group management and increased network traffic, especially in large deployments.
* EVPN-Signaled VXLAN:
* EVPN-signaled VXLAN uses BGP (Border Gateway Protocol) to signal the presence of VTEPs and distribute MAC address information. BGP is used for VTEP autodiscovery and the distribution of endpoint information.
* This method is more efficient because it reduces the reliance on multicast, instead using BGP control-plane signaling to handle VTEP discovery and MAC learning, which reduces the overhead on the network and improves scalability.
* Correct Statements:
* B. An EVPN-signaled VXLAN can perform autodiscovery of VTEPs using BGP:This is correct because EVPN uses BGP for VTEP autodiscovery, making it more efficient and scalable compared to multicast-based methods.
* C. An EVPN-signaled VXLAN is less resource-intensive:This is correct because it eliminates the need for multicast flooding in the underlay, instead using BGP for signaling, which is less demanding on network resources.
* Incorrect Statements:
* A. An EVPN-signaled VXLAN can perform autodiscovery of VTEPs using IS-IS:This is incorrect because EVPN relies on BGP, not IS-IS, for VTEP discovery and signaling.
* D. An EVPN-signaled VXLAN features slower and more complete convergence:This is incorrect; EVPN with BGP typically provides faster convergence due to its use of a control plane rather than relying on data plane learning.
Data Center References:
* EVPN-VXLAN is widely adopted in modern data center designs due to its scalability, efficiency, and reduced resource consumption compared to multicast-based VXLAN solutions. It leverages the strengths of BGP for control-plane-driven operations, resulting in more efficient and scalable networks.
NEW QUESTION # 101
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