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Study Guide JN0-683 Pdf - JN0-683 Free Practice

The Certified Production and JN0-683 certification is a valuable credential earned by individuals to validate their skills and competence to perform certain job tasks. Your Data Center, Professional (JNCIP-DC) JN0-683 Certification is usually displayed as proof that you’ve been trained, educated, and prepared to meet the specific requirement for your professional role.

Juniper JN0-683 Exam Syllabus Topics:

Topic	Details
Topic 1	Layer 3 Fabrics: This section measures the knowledge of professionals managing IP-based networks in data centers. It covers IP fabric architecture and routing, ensuring candidates understand how the network is structured for scalability and how traffic is routed efficiently.
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 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 4	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.

Juniper Data Center, Professional (JNCIP-DC) Sample Questions (Q50-Q55):

NEW QUESTION # 50
Which two statements are true about a pure IP fabric? (Choose two.)

A. An IP fabric supports Layer 2 VLANs.
B. Devices in an IP fabric function as Layer 3 routers.
C. An IP fabric does not support Layer 2 protocols.
D. Devices in an IP fabric must be connected to a fabric controller.

Answer: B,C

Explanation:
* Understanding Pure IP Fabric:
* A pure IP fabric is a network design where all devices operate at Layer 3, meaning that each device in the fabric is a router that makes forwarding decisions based on IP addresses.
* Layer 2 Support:
* In a pure IP fabric, traditional Layer 2 protocols such as Spanning Tree Protocol (STP) or VLANs are not supported. Instead, the network relies entirely on Layer 3 routing protocols to manage traffic between devices.
* Routing Functionality:
* Since devices in an IP fabric operate as Layer 3 routers, they handle IP routing and provide network services based on IP addresses, not on MAC addresses or Layer 2 switching.
Conclusion:
* Option A:Correct-Devices in an IP fabric function as Layer 3 routers.
* Option D:Correct-A pure IP fabric does not support traditional Layer 2 protocols, making it a purely routed environment.

NEW QUESTION # 51
Exhibit.

Both DC and DC2 ate using EVPN-VXLAN technology deployed using an ERB architecture. A server on the Red VLAN must communicate with a server on the Green VLAN. The Blue VLAN in DC and DC2 needs to be the same VLAN.
Which statement is correct in this scenario?

A. An interconnect is required between the four SRX Series devices; the Blue VLAN must be stretched and a transit VNI must be added for the Red and Green VLANs.
B. The eight spine devices must be configured as border spine devices; a full mush interconnect must exist between all eight spine devices and the Blue VLAN must be stitched together
C. An interconnect is required between four leaf devices in the services blocks; the Red VLAN and the Green VLAN must be stitched and the Blue VLAN must be stretched.
D. A lean super spine device must be added to DC and DC2; all VLANs must be stretched to the lean super spine device and the lean super spine devices must stitch all the VLANs together.

Answer: A

Explanation:
* ERB Architecture in EVPN-VXLAN:
* ERB (Edge Routed Bridging) architecture is commonly used in data center networks where routing decisions are made at the network edge (leaf or border devices), while bridging (Layer 2 forwarding) is extended across the fabric. This architecture allows for efficient L3 routing while still enabling L2 services like VLANs to span across multiple locations.
* VLAN and VNI Configuration:
* The scenario specifies that a server on the Red VLAN needs to communicate with a server on the Green VLAN. Since these VLANs are in different data centers (DC and DC2), and given the use of EVPN-VXLAN, the communication between these VLANs will require atransit VNI(Virtual Network Identifier). This transit VNI will allow traffic to traverse the VXLAN tunnel across the DCI (Data Center Interconnect).
* Interconnect between SRX Series Devices:
* The exhibit shows SRX Series Chassis Clusters used as service devices (likely for firewalling or other security services). These devices need to be interconnected between the two data centers to ensure that VLANs can communicate effectively. The Blue VLAN needs to be stretched between DC and DC2 to maintain the same Layer 2 domain across both data centers.
Conclusion:
* Option B:Correct-Interconnecting the SRX Series devices will ensure the necessary service chaining, while stretching the Blue VLAN and adding a transit VNI for the Red and Green VLANs will enable the required communication across the data centers.

NEW QUESTION # 52
You are asked to set up an IP fabric thatsupports Al or ML workloads. You have chosen to use lossless Ethernet in this scenario, which statement is correct about congestion management?

A. Only the source and destination devices need ECN enabled.
B. The switch experiencing the congestion notifies the source device.
C. ECN marks packets based on WRED settings.
D. ECN is negotiated only among the switches that make up the IP fabric for each queue.

Answer: B

Explanation:
* Understanding Lossless Ethernet and Congestion Management:
* Lossless Ethernet is crucial for AI and ML workloads, where packet loss can significantly degrade performance. To implement lossless Ethernet, congestion management protocols like ECN (Explicit Congestion Notification) are used.
* Role of ECN in Congestion Management:
* Option A:In an IP fabric that supports lossless Ethernet, when a switch experiences congestion, it can mark packets using ECN. This marking notifies the source device of the congestion, allowing the source to reduce its transmission rate, thereby preventing packet loss.
Conclusion:
* Option A:Correct-The switch experiencing congestion notifies the source device via ECN marking.

NEW QUESTION # 53
Whatare two supported methods (or exporting data when using the Junos telemetry interface? (Choose two.)

A. using UDP
B. using REST
C. using SNMP
D. using gRPC

Answer: A,D

Explanation:
* Junos Telemetry Interface (JTI):
* The Junos Telemetry Interface is a framework that allows network operators to collect real-time telemetry data from Juniper devices. This data can be used for monitoring, analytics, and network automation.
* Data Export Methods:
* Option B:UDP (User Datagram Protocol)is a lightweight, connectionless protocol used for exporting telemetry data quickly with minimal overhead. While it doesn't guarantee delivery, it is suitable for high-speed data transfer where occasional packet loss is acceptable.
* Option D:gRPC (gRPC Remote Procedure Call)is a modern, high-performance method for data export that supports streaming and remote procedure calls, making it ideal for more complex telemetry data use cases.
Conclusion:
* Option B:Correct-UDP is supported for exporting telemetry data.
* Option D:Correct-gRPC is also supported, offering advanced streaming capabilities

NEW QUESTION # 54
Which statement is correct about a collapsed fabric EVPN-VXLAN architecture?

A. Fully meshed back-to-back links are needed between the spine devices.
B. Using Virtual Chassis at the leaf layer increases resiliency.
C. It supports multiple vendors in the fabric as long as all the spine devices are Juniper devices deployed with L2 VTEPs
D. Border gateway functions occur on border leaf devices.

Answer: D

Explanation:
* Collapsed Fabric Architecture:
* A collapsed fabric refers to a simplified architecture where the spine and leaf roles are combined, often reducing the number of devices and links required.
* In this architecture, the spine typically handles core switching, while leaf switches handle both access and distribution roles.
* Understanding Border Gateway Functionality:
* Border gateway functions include connecting the data center to external networks or other data centers.
* In a collapsed fabric, these functions are usually handled at the leaf level, particularly on border leaf devices that manage the ingress and egress of traffic to and from the data center fabric.
* Correct Statement:
* D. Border gateway functions occur on border leaf devices:This is accurate in collapsed fabric architectures, where the border leaf devices take on the role of managing external connections and handling routes to other data centers or the internet.
Data Center References:
* The collapsed fabric model is advantageous in smaller deployments or scenarios where simplicity and cost-effectiveness are prioritized. It reduces complexity by consolidating functions into fewer devices, and the border leaf handles the critical task of interfacing with external networks.
In conclusion, border gateway functions are effectively managed at the leaf layer in collapsed fabric architectures, ensuring that the data center can communicate with external networks seamlessly.

NEW QUESTION # 55
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