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Juniper JN0-683 Exam Syllabus Topics:

TopicDetails
Topic 1
  • Data Center Deployment and Management: This section assesses the expertise of data center networking professionals like architects and engineers, focusing on key deployment concepts. Topics include Zero-touch provisioning (ZTP), which automates device setup in data centers without manual input.
Topic 2
  • EVPN-VXLAN Signaling: This section assesses an understanding of Ethernet VPN (EVPN) concepts, including route types, multicast handling, and Multiprotocol BGP (MBGP). It also covers EVPN architectures like CRB and ERB, MAC learning, and symmetric routing.
Topic 3
  • Data Center Multitenancy and Security: This section tests knowledge of single-tenant and multitenant data center setups. Candidates such as Data Center Professionals are evaluated on ensuring tenant traffic isolation at both Layer 2 and Layer 3 levels in shared infrastructure environments.
Topic 4
  • Data Center Interconnect: For Data Center Engineers, this part focuses on interconnecting data centers, covering Layer 2 and Layer 3 stretching, stitching fabrics together, and using EVPN-signaled VXLAN for seamless communication between data centers.
Topic 5
  • VXLAN: This part requires knowledge of VXLAN, particularly how the control plane manages communication between devices, while the data plane handles traffic flow. Demonstrate knowledge of how to configure, Monitor, or Troubleshoot VXLAN.

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Juniper Data Center, Professional (JNCIP-DC) Sample Questions (Q81-Q86):

NEW QUESTION # 81
Which three statements are correct about symmetric IRB routing with EVPN Type 2 routes? (Choose three.)

Answer: A,C,D

Explanation:
* Symmetric IRB Routing with EVPN Type 2 Routes:
* Symmetric Routing: In symmetric IRB (Integrated Routing and Bridging), routing occurs in both directions at the ingress and egress leaf nodes using the same routing logic. This is contrasted with asymmetric routing, where different routing logic is used depending on the direction of the traffic.
* Required Components:
* Option A:An L3 IRB interface is necessary for each VLAN that participates in routing, as it handles the Layer 3 processing for the VLAN.
* Option B:MAC-VRF is required for symmetric routing to maintain a mapping of MAC addresses to the appropriate VRF, ensuring correct forwarding within the EVPN.
* Option D:A transit VNI (Virtual Network Identifier) is required for each VRF to encapsulate the Layer 3 traffic as it traverses the network, allowing the IP traffic to be appropriately forwarded.
Conclusion:
* Option A:Correct-Each local VLAN needs an IRB interface for L3 processing.
* Option B:Correct-MAC-VRF is necessary for handling MAC address resolution in symmetric routing.
* Option D:Correct-Transit VNIs are required for routing VRF-specific traffic across the network.
OptionsCandEare incorrect because:
* C:Symmetric routing can work with various VLAN models, including single or multiple VLANs within an EVPN instance.
* E:Symmetric routing is generally more efficient than asymmetric routing as it uses consistent routing logic in both directions.


NEW QUESTION # 82
Exhibit.

You have a sample configuration for connecting two sites through EVPN-VXLAN by exchanging IP prefix routes.
Referring to the exhibit, which two statements regarding the configuration are true? {Choose two.)

Answer: B,C

Explanation:
EVPN-VXLAN Configuration:
* The configuration provided in the exhibit shows an EVPN-VXLAN setup where IP prefix routes are exchanged between two sites. The advertise direct-nexthop option and the VNI (Virtual Network Identifier) settings are crucial in this context.
Advertise Direct-Nexthop:
* Option A:The advertise direct-nexthop option ensures that the next-hop route is resolved using only the information carried in the EVPN Type 5 route. Type 5 routes are used for IP prefix advertisement in EVPN, which is key to enabling Layer 3 interconnectivity between different VXLAN segments.
VNI Consistency:
* Option C:For the same customer across different devices, the VNI must be consistent. This consistency ensures that all devices can correctly map traffic to the appropriate VXLAN segment, maintaining seamless Layer 2 and Layer 3 connectivity.


NEW QUESTION # 83
Click the Exhibit button. You want to enable the border leaf device to send Type 5 routes of local networks to the border leaf device in another data center.
What must be changed to the configuration shown in the exhibit to satisfy this requirement?

Answer: A

Explanation:
For EVPN Type 5 route advertisement and full inter-data center connectivity, the EVPN configuration must specify the encapsulation type, especially if VXLAN is used as the data-plane overlay.
The parameter encapsulation vxlan must be added under the protocols evpn hierarchy to ensure border leaf devices can advertise and exchange IP prefix routes (Type 5) properly between data centers.
The option to move vrf-target under the EVPN hierarchy is not valid, as that statement is only supported within the routing instance or vni-options section, but not directly under protocols evpn.


NEW QUESTION # 84
You are asked to set up an IP fabric that supports AI or ML workloads. You have chosen to use lossless Ethernet.
In this scenario, which statement is correct about congestion management?

Answer: A

Explanation:
In a lossless Ethernet environment, such as one designed to support AI or ML workloads, ECN (Explicit Congestion Notification) is used to signal congestion to the source device. When congestion occurs in the network, the switch experiencing the congestion marks packets with ECN to notify the source device. This allows the source to adjust its sending rate, helping to avoid further congestion and ensuring that traffic continues to flow efficiently.


NEW QUESTION # 85
You are using EBGP peering in an underlay IP fabric.
Which two statements are correct in this scenario? (Choose two.)

Answer: A,B

Explanation:
Every leaf node has one peering session to every spine node: In an EBGP peering setup within an underlay IP fabric, each leaf node typically establishes a single EBGP session with each spine node. This is a common design for scalability, as it ensures that the leaf nodes can exchange routing information with all spine nodes directly.
EBGP peering does not require an IGP protocol for adjacency establishment: EBGP (External BGP) peering in an underlay IP fabric does not require an IGP (Interior Gateway Protocol) such as OSPF or IS-IS to establish peering relationships. EBGP is used for establishing external routing between different ASes, and within a single AS, the peering is established directly between devices. This eliminates the need for an IGP for the actual EBGP session.


NEW QUESTION # 86
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