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| Certification Vendor: | Juniper Networks |
|---|---|
| Exam Name: | Data Center, Professional (JNCIP-DC) Exam |
| Exam Number: | JN0-683 |
| Exam Format: | Scenario-based, Multiple choice |
| Certificate Validity Period: | 3 years |
| Real Exam Qty: | 65 |
| Related Certifications: | JNCIS-DC JNCIE-DC JNCIA-DC |
| Passing Score: | Variable (approx. 65%-70%) |
| Exam Price: | $400 USD |
| Exam Duration: | 90 minutes |
| Available Languages: | English |
| Recommended Training: | Juniper Learning Portal |
| Exam Registration: | Pearson VUE Registration |
| Sample Questions: | Juniper JN0-683 Sample Questions |
| Exam Way: | Online proctored or onsite at Pearson VUE test centers |
| Pre Condition: | Valid JNCIS-DC or JNCIS-ENT certification |
| Official Syllabus URL: | https://www.juniper.net/us/en/training/certification/tracks/data-center/jncip-dc.html |
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| Thema | Einzelheiten |
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45. Frage
Which two statements are correct about an ERB architecture? (Choose two.)
Antwort: A,B
Begründung:
In an edge-routed bridging architecture, Layer 3 gateway functions are implemented on the leaf devices, so inter-VLAN routing occurs at the edge. The VXLAN tunnel endpoints are also located on the leaf devices, which encapsulate and decapsulate traffic as it enters and exits the overlay.
46. Frage
Exhibit.
A VXLAN tunnel has been created between leaf1and Ieaf2 in your data center. Referring to the exhibit, which statement is correct?
Antwort: C
Begründung:
* Understanding VXLAN Tunneling:
* VXLAN (Virtual Extensible LAN) is a network virtualization technology that addresses the scalability issues associated with traditional VLANs. VXLAN encapsulates Ethernet frames in UDP, allowing Layer 2 connectivity to extend across Layer 3 networks.
* Each VXLAN network is identified by a unique VXLAN Network Identifier (VNI). In this exhibit, we have two VNIs, 5100 and 5200, assigned to the VXLAN tunnels between leaf1 and leaf2.
* Network Setup Details:
* Leaf1:Connected to Server1 with VLAN ID 100 and associated with VNI 5100.
* Leaf2:Connected to Server2 with VLAN ID 200 and associated with VNI 5200.
* Spine:Acts as the interconnect between leaf switches.
* Traffic Flow Analysis:
* When traffic is sent from Server1 to Server2, it is initially tagged with VLAN ID 100 on leaf1.
* The traffic is encapsulated into a VXLAN packet with VNI 5100 on leaf1.
* The packet is then sent across the network (via the spine) to leaf2.
* On leaf2, the VXLAN header is removed, and the original Ethernet frame is decapsulated.
* Leaf2 will then associate this traffic with VLAN ID 200 before forwarding it to Server2.
* Correct Interpretation of the Exhibit:
* The traffic originating from Server1, which is tagged with VLAN ID 100, will be encapsulated into VXLAN and transmitted to leaf2.
* Upon arrival at leaf2, it will be decapsulated, and since it is associated with VNI 5200 on leaf2, the traffic will be retagged with VLAN ID 200.
* Therefore, the traffic will reach Server2 tagged with VLAN ID 200, which matches the network configuration shown in the exhibit.
* Data Center References:
* This configuration is typical in data centers using VXLAN for network virtualization. It allows isolated Layer 2 segments (VLANs) to be stretched across Layer 3 boundaries while maintaining distinct VLAN IDs at each site.
* This approach is efficient for scaling large data center networks while avoiding VLAN ID exhaustion and enabling easier segmentation.
In summary, the correct behavior, as per the exhibit and the detailed explanation, is that traffic sent from Server1 will be tagged with VLAN ID 200 when it reaches Server2 via leaf2. This ensures proper traffic segmentation and handling across the VXLAN-enabled data center network.
47. Frage
You are using filter-based forwarding with a VXLAN overlay. What are two benefits in this scenario? (Choose two.)
Antwort: C,D
Begründung:
Filter-based forwarding allows selective steering of specific traffic flows into different routing instances or service chains, enabling targeted inspection and policy enforcement for only the required flows. By redirecting only matched traffic instead of all traffic, it optimizes resource usage and avoids unnecessary processing, leading to more efficient utilization of network resources.
48. Frage
Click the Exhibit button.
The 192.168.0.0/24 route is being advertised into your IP fabric by the leaf device in AS 65512.
Both spine devices receive and advertise the route to all other leaf devices. You must ensure that traffic destined to this network is load-balanced between spine devices.
In this scenario, which two statements are correct? (Choose two.)
Antwort: A,C
Begründung:
To load-balance traffic from a leaf toward an external prefix learned via both spines, the leaf must install multiple equal BGP next hops for that route and then perform ECMP in the forwarding table. Enabling BGP multipath on the leaf allows it to keep both spine-learned paths active for the same prefix, and applying a forwarding-table load-balancing policy on the leaf ensures traffic is actually distributed across the available next hops.
49. Frage
Click the Exhibit button.
Referring to the configuration shown in the exhibit, assume that there is no external router present and that the configuration is fabric-only.
Which two statements are true about the example configuration? (Choose two.)
Antwort: A,B
Begründung:
The exhibit shows configurations for two VRFs (Customer_A and Customer_B) with specific VLANs and VNIs assigned. Each VRF has interfaces (IRBs) associated with particular VLANs.
Option B: VLAN 400 (irb.400) is part of Customer_B, and there is no direct connection or routing between Customer_A and Customer_B in the configuration provided. Therefore, devices in irb.400 cannot communicate directly with devices in the Customer_A routing instance.
Option D: Since irb.400 (VLAN 400) and irb.800 (VLAN 800) are part of the same routing instance (Customer_B), they can communicate over the fabric using VXLAN encapsulation.
50. Frage
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