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Valid Test JN0-683 Format - JN0-683 Cert Guide

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Juniper JN0-683 Exam Syllabus Topics:

Topic
Details

Topic 1

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 2

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 3

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 (Q51-Q56):

NEW QUESTION # 51
You are deploying an IP fabric with an oversubscription ratio of 3:1.
In this scenario, which two statements are correct? (Choose two.)

A. The oversubscription ratio increases when you remove leaf devices.
B. The oversubscription ratio decreases when you add leaf devices.
C. The oversubscription ratio remains the same when you add leaf devices.
D. The oversubscription ratio remains the same when you remove leaf devices.

Answer: A,C

Explanation:
* Understanding Oversubscription Ratio in IP Fabrics:
* The oversubscription ratio in an IP fabric typically refers to the ratio of the available bandwidth at the edge of the network (leaves) to the available bandwidth at the core or spine. A 3:1 oversubscription ratio means that for every 3 units of bandwidth at the leaves, there is 1 unit of bandwidth at the spine.
* Impact of Adding or Removing Leaf Devices:
* Removing Leaf Devices:When you remove leaf devices, the amount of total edge bandwidth decreases while the bandwidth in the spine remains constant. This causes the oversubscription ratio toincreasebecause there is now less total bandwidth to distribute across the same amount of spine bandwidth.
* Adding Leaf Devices:Conversely, when you add leaf devices, the total edge bandwidth increases. Since the spine bandwidth remains the same, the oversubscription ratio would remain the same if the additional leaves consume their share of the available bandwidth proportionally.
Conclusion:
* Option C:Correct-Removing leaf devices increases the oversubscription ratio.
* Option D:Correct-Adding leaf devices typically maintains the oversubscription ratio assuming uniform bandwidth distribution.

NEW QUESTION # 52
Which two statements are true about IP fabrics using unnumbered BGP? (Choose two.)

A. Unnumbered BGP requires that family inet6 is configured on each interface.
B. Unnumbered BGP requires that family inet is configured on each interface.
C. Unnumbered BGP peering automatically provisions IPv4 peering.
D. Unnumbered BGP peering automatically provisions IPv6 peering.

Answer: A,C

Explanation:
https://www.juniper.net/documentation/us/en/software/nce/nce-225-bgp-unnumbered/index.html

NEW QUESTION # 53
Exhibit.

Referring to the exhibit, when Host A sends an ARP request for Host B's IP address, which Junos feature does leaf1require to send an ARP response back to Host A without having to send a broadcast frame over the fabric?

A. GARP
B. DAD
C. proxy ARP
D. proxy NDP

Answer: C

Explanation:
* Scenario Overview:
* In the exhibit, Host A is trying to resolve Host B's IP address (10.10.1.2) through ARP (Address Resolution Protocol). Normally, an ARP request would be broadcasted over the network, and the host owning the IP address (Host B) would respond.
* Role of Proxy ARP:
* Option A:Proxy ARPallows a router or switch (in this case, leaf1) to respond to ARP requests on behalf of another host. Leaf1, knowing the MAC address of Host B through the EVPN MAC advertisement, can reply to Host A's ARP request directly without broadcasting the request across the entire network fabric. This feature reduces unnecessary traffic and increases network efficiency.
Conclusion:
* Option A:Correct-Proxy ARP enables leaf1 to respond to Host A's ARP request for Host B's IP without broadcasting over the IP fabric, thus providing the ARP response locally.

NEW QUESTION # 54
Exhibit.

Referring tothe exhibit, which statement is correct?

A. The MAC address is unknown and not in the forwarding table of the remote VTEP.
B. The MAC address is known but not reachable by the remote VTEP
C. The remote VTEP is not responding.
D. VNI 100 is not configured on the remote VTEP.

Answer: A

Explanation:
* Analyzing the Exhibit Output:
* The command ping overlay tunnel-type vxlan is used to test the VXLAN tunnel between two VTEPs (VXLAN Tunnel Endpoints). The output shows a warning about missing hash parameters, but more importantly, it displays the result: End-System Not Present.
* Understanding the Response:
* The message End-System Not Present indicates that the remote VTEP (192.168.2.20) did not find the MAC address 00:00:5E:00:53:CC in its forwarding table. This typically means that the MAC address is unknown to the remote VTEP, and as a result, it could not forward the packet to the intended destination.
Conclusion:
* Option B:Correct-The MAC address is unknown and is not in the forwarding table of the remote VTEP, which is why the system reports that the "End-System" is not present.

NEW QUESTION # 55
You are asked for TX and RX traffic statistics for each interface to which an application server is attached.
The statistics need to be reported every five seconds. Using the Junos default settings, which telemetry method would accomplish this request?

A. OpenConfig
B. Native Sensors
C. gNMI
D. SNMP

Answer: B

Explanation:
* Telemetry Methods in Junos:
* Telemetry is used to collect and report data from network devices. For high-frequency statistics reporting, such as every five seconds, you need a telemetry method that supports this level of granularity and real-time monitoring.
* Junos Native Sensors:
* Option C:Native Sensors in Junos provide detailed, high-frequency telemetry data, including TX and RX traffic statistics for interfaces. They are designed to offer real-time monitoring with customizable sampling intervals, making them ideal for the five-second reporting requirement.
Conclusion:
* Option C:Correct-Native Sensors in Junos are capable of providing the required high-frequency telemetry data every five seconds.

NEW QUESTION # 56
......

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Paul Shaw Paul Shaw

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