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Updated Juniper JN0-683 Exam Questions BUNDLE PACK

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Juniper JN0-683 Exam Syllabus Topics:

Topic
Details

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

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.

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.

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Juniper Data Center, Professional (JNCIP-DC) Sample Questions (Q52-Q57):

NEW QUESTION # 52
Exhibit.

Referring to the exhibit, the spinel device has an underlay BGP group that is configured to peer with its neighbors' directly connected interfaces. Which two statements are true in this scenario? (Choose two.)

A. The multihop statement is not required to establish the underlay BGP sessions.
B. Load balancing for the underlay is not configured correctly.
C. Load balancing for the underlay is configured correctly.
D. The multihop statement is required to establish the underlay BGP sessions.

Answer: A,C

Explanation:
* Understanding BGP Configuration in the Exhibit:
* The exhibit shows a BGP configuration on spine1 with a group named underlay, configured to peer with directly connected interfaces of other devices in the network.
* Multipath multiple-as:This statement allows the router to install multiple paths in the routing table for routes learned from different ASes, facilitating load balancing.
* Key Statements:
* A. The multihop statement is not required to establish the underlay BGP sessions:In this case, the BGP peers are directly connected (as indicated by their neighbor IP addresses), so the multihop statement is unnecessary. Multihop is typically used when BGP peers are not directly connected and packets need to traverse multiple hops.
* D. Load balancing for the underlay is configured correctly:The multipath { multiple-as; } statement in the configuration enables load balancing across multiple paths from different autonomous systems, which is appropriate for underlay networks in data center fabrics.
* Incorrect Statements:
* C. The multihop statement is required to establish the underlay BGP sessions:This is incorrect because the peers are directly connected, making the multihop statement unnecessary.
* B. Load balancing for the underlay is not configured correctly:This is incorrect because the configuration includes the necessary multipath settings for load balancing.
Data Center References:
* BGP configurations in EVPN-VXLAN underlay networks are crucial for ensuring redundancy, load balancing, and efficient route propagation across the data center fabric.

NEW QUESTION # 53
Why is a designated forwarder required in a multihomed CE-to-PE VXLAN environmentusing EVPN signalling?

A. The designated forwarder is required to prevent duplicate packets from being received on multihomed hosts.
B. The designated forwarder is required to prevent packets from looping between the PEs.
C. The designated forwarder is required to prevent a traffic storm from being received on multihomed hosts.
D. The designated forwarder is required to prevent flooding of MAC addresses to multihomed hosts.

Answer: A

Explanation:
* Understanding Multihomed CE-to-PE VXLAN Environment:
* In a VXLAN environment using EVPN signaling, multiple PEs (Provider Edge devices) can be connected to the same CE (Customer Edge device). This setup is referred to as multihoming, where a CE device has multiple connections to the network to ensure redundancy and load balancing.
* Role of the Designated Forwarder:
* The designated forwarder (DF) is a mechanism used in EVPN to manage the forwarding of broadcast, unknown unicast, and multicast (BUM) traffic in a multihomed environment. The DF is selected to ensure that only one of the PEs forwards this type of traffic to the CE, preventing loops and unnecessary duplicate packets.
* Avoiding Duplicate Packets:
* Without a designated forwarder, all PEs connected to a multihomed CE could potentially forward the same packet to the CE, resulting in duplicate packets. This duplication can cause issues with packet processing on the CE, leading to inefficiencies and potential network problems.
Conclusion:
* Option D:Correct-The designated forwarder is essential to prevent duplicate packets from being received on multihomed hosts, ensuring that only one PE forwards BUM traffic to the CE.

NEW QUESTION # 54
Exhibit.

A VXLAN tunnel has been created between leaf1 and Ieaf2 in your data center. Referring to the exhibit, which statement is correct?

A. Traffic sent from server1 to server2 will be tagged with VLAN ID 100 on Ieaf2 and forwarded to server2.
B. Traffic sent from server1 to server2 will be tagged with VLAN ID 200 on Ieaf2 and forwarded to server2.
C. Traffic sent from server1 to server2 will be dropped on leaf1.
D. Traffic sent from server1 to server2 will be dropped on Ieaf2.

Answer: C

NEW QUESTION # 55
Exhibit.

Given the configuration shown in the exhibit, why has the next hop remained the same for the EVPN routes advertised to the peer 203.0.113.2?

A. The vrf-export parameter must be applied.
B. The export policy is incorrectly configured.
C. The vpn-apply-export parameter must be applied to this peer.
D. EVPN routes cannot have the next hop changed.

Answer: C

Explanation:
* Understanding the Configuration:
* The configuration shown in the exhibit involves an EVPN (Ethernet VPN) setup using BGP as the routing protocol. The export policy named CHANGE_NH is applied to the BGP group evpn- peer, which includes a rule to change the next hop for routes that match the policy.
* Issue with Next Hop Not Changing:
* The policy CHANGE_NH is correctly configured to change the next hop to 203.0.113.10 for the matching routes. However, the next hop remains unchanged when advertising EVPN routes to the peer 203.0.113.2.
* Reason for the Issue:
* In Junos OS, when exporting routes for VPNs (including EVPN), the next-hop change defined in a policy will not take effect unless the vpn-apply-export parameter is used inthe BGP configuration. This parameter ensures that the export policy is applied specifically to VPN routes.
* The vpn-apply-export parameter must be included to apply the next-hop change to EVPN routes.
* Correct Answer Explanation:
* D. The vpn-apply-export parameter must be applied to this peer:This is the correct solution because the next hop in EVPN routes won't be altered without this parameter in the BGP configuration. It instructs the BGP process to apply the export policy to the EVPN routes.
Data Center References:
* This behavior is standard in EVPN deployments with Juniper Networks devices, where the export policies applied to VPN routes require explicit invocation using vpn-apply-export to take effect.

NEW QUESTION # 56
You are asked to deploy 100 QFX Series devices using ZTP Each OFX5120 requires a different configuration. In this scenario, what are two components that you would configure on the DHCP server?
(Choose two.)

A. the MAC address for each OFX5120
B. the IP address of the FTP server
C. the MAC address of the FTP server
D. the management IP address for each OFX5120

Answer: A,D

NEW QUESTION # 57
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