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Pass Guaranteed JN0-683 - Updated Data Center, Professional (JNCIP-DC) Valid Vce Dumps

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Juniper JN0-683 Exam Syllabus Topics:

Topic
Details

Topic 1

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 2

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 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 (Q16-Q21):

NEW QUESTION # 16
Referring to the exhibit, why is the active source field blank for the entry that uses the
00:0c:29:e8:b7:39 MAC address?

A. The host for this entry is locally connected to leaf1.
B. This entry is associated with a multicast EVPN route.
C. The ARP lookup for this host has failed.
D. The EVPN route for this host does not have a valid next hop.

Answer: A

Explanation:
In an Ethernet switching table, if a MAC address is learned on a local interface (e.g., xe-0/0/4.0), the active source will be blank since the source is local and not learned via EVPN from another VTEP or remote site.
Remote entries (learned via VXLAN/EVPN) typically display the VTEP information as the active source; local entries do not populate this field.

NEW QUESTION # 17
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 decreases when you add leaf devices.
B. The oversubscription ratio remains the same when you remove leaf devices.
C. The oversubscription ratio remains the same when you add leaf devices.
D. The oversubscription ratio increases when you remove leaf devices.

Answer: C,D

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 # 18
Which three statements are correct about VXLAN control planes? (Choose three.)

A. Multicast is not agile and requires manual VNI mapping.
B. Both multicast and EVPN can facilitate MAC learning.
C. EVPN is inefficient and does not scale well.
D. EVPN enables fast convergence and updates.
E. Multicast does not require as many resources.

Answer: B,D,E

Explanation:
EVPN enables fast convergence and updates: EVPN (Ethernet VPN) provides a more scalable and efficient control plane for VXLAN, enabling fast convergence and quicker updates for network changes. This is achieved through the use of BGP (Border Gateway Protocol) as the control plane protocol, which allows for efficient distribution of MAC and IP address information.
Both multicast and EVPN can facilitate MAC learning: Both multicast and EVPN can handle MAC address learning in a VXLAN environment. In multicast-based VXLAN, MAC addresses are learned and distributed via multicast control messages, whereas in EVPN, MAC addresses are distributed via BGP advertisements, which are more efficient and scalable.
Multicast does not require as many resources: Multicast-based VXLAN control planes use standard multicast protocols like PIM (Protocol Independent Multicast) to forward traffic across the VXLAN fabric. While multicast has resource requirements for managing multicast groups, it does not require the same level of control-plane processing as EVPN, which uses BGP to handle MAC address advertisements. However, multicast can be less agile and may require additional configuration.

NEW QUESTION # 19
Exhibit.

Referring to the exhibit, which statement Is true?

A. A PBB-EVPN architecture is being used.
B. An OTT architecture is being used.
C. A CRB architecture is being used.
D. An ERB architecture is being used.

Answer: D

Explanation:
* Understanding Network Architectures:
* ERB (Edge Routed Bridging) architecture involves routing at the network's edge (leaf nodes), while traffic between leaf nodes is switched. This is commonly used in VXLAN-EVPN setups.
* Analysis of the Exhibit:
* The exhibit shows configurations related to routing instances, VXLAN, and VLANs, with VNIs being used for each VLAN. This setup is characteristic of an ERB architecture where each leaf device handles Layer 3 routing for its connected devices.
Conclusion:
* Option B:Correct-The configuration shown corresponds to an ERB architecture where routing occurs at the network's edge (leaf devices).

NEW QUESTION # 20
You are preparing an sFlow monitoring system configuration. In this scenario, what Information will be included in the datagram sent to the sFlow collector? (Choose two.)

A. the sending device's serial number
B. the CRC from the sampled packet
C. the source and destination VLAN for sampled packets
D. the interlace through which the packets entered the agent

Answer: C,D

Explanation:
sFlow is a packet sampling technology used to monitor traffic in a network. It sends sampled packet data and interface counters to an sFlow collector, which analyzes the traffic patterns.
Option A: The datagram sent to the sFlow collector includes information about the interface through which the packets entered the agent (the switch or router). This is crucial for understanding where in the network the traffic was captured.
Option D: sFlow datagrams also include the source and destination VLAN for the sampled packets. This allows for detailed analysis of the traffic flow within different VLANs.

NEW QUESTION # 21
......

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