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| Certification Vendor: | Juniper Networks |
|---|---|
| Exam Name: | Junos Data Center, Specialist (JNCIS-DC) |
| Exam Number: | JN0-481 |
| Related Certifications: | JNCIP-DC JNCIE-DC JNCIA-DC |
| Exam Format: | Multiple-response, Multiple-choice, Scenario-based questions |
| Certificate Validity Period: | 3 years |
| Real Exam Qty: | Approximately 65 |
| Available Languages: | English |
| Exam Price: | $300 USD (may vary by region) |
| Exam Duration: | 90 minutes |
| Passing Score: | Approximately 60–70% |
| Recommended Training: | EVPN-VXLAN Learning Resources Juniper Data Center Training Courses |
| Exam Registration: | Juniper Certification Portal Pearson VUE Juniper Exams |
| Sample Questions: | Juniper JN0-481 Sample Questions |
| Exam Way: | Online proctored or Pearson VUE test center |
| Pre Condition: | JNCIA-DC is recommended but not strictly required |
| Official Syllabus URL: | https://www.juniper.net/us/en/training/certification/certification-tracks/data-center.html |
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NEW QUESTION # 52
You are using tags within Juniper Apstra for searching information in the blueprint about existing elements.
In this scenario, what is another construct that uses tags?
Answer: C
Explanation:
In Juniper Apstra, tags are used not only for searching and filtering blueprint elements (like interfaces, generic systems, and virtual networks) but are also applied to services. This allows for better organization, classification, and management of services within the blueprint.
NEW QUESTION # 53
What does VXLAN use to uniquely label and identify broadcast domains?
Answer: B
Explanation:
In a VXLAN overlay, each Layer 2 broadcast domain (the logical equivalent of a VLAN/bridge domain) is identified by a 24-bit VXLAN Network Identifier (VNI) carried in the VXLAN header. This VNI is what allows the overlay to scale far beyond traditional VLAN space (12-bit VLAN IDs), enabling up to ~16 million distinct segments. In an EVPN-VXLAN data center fabric, Junos v24.4 leaf switches operate as VTEPs and map local bridge domains (often associated with VLANs on server-facing ports) to a VNI. When traffic is sent across the routed underlay, the leaf encapsulates Ethernet frames into VXLAN packets and inserts the VNI so the receiving VTEP can place the frame into the correct broadcast domain on decapsulation.
Apstra 5.1 abstracts this mapping through virtual networks and resource allocation: when you define a VXLAN-based virtual network, Apstra allocates a VNI from the appropriate pool and consistently programs the necessary constructs on all participating leaves. The key point is that VNI is the unique identifier in the VXLAN data plane used to label the broadcast domain across the IP fabric; VLAN IDs may exist locally at the edge for tagging, but the globally significant overlay identifier is the VNI.
Verified Juniper sources (URLs):
https://www.juniper.net/documentation/us/en/software/junos/evpn/topics/topic-map/sdn-vxlan.html
NEW QUESTION # 54
You are using Juniper Apstra to create logical devices and interface maps. You use them in three different rack types. You then modify the logical devices to support the required increased interface speeds and receive an error message when updating the logical devices.
Referring to the exhibit, which action is needed to remove the error?
Answer: A
Explanation:
In Juniper Apstra, logical devices must remain semantically valid across all references (templates, racks, and interface maps). If you change interface speeds or roles, any existing references to that logical device can become inconsistent, leading to the validation error shown.
To resolve it, you must remove all dependencies - templates, racks, and interface maps - that reference the logical device, then recreate or update them with the modified logical device definition.
NEW QUESTION # 55
Using Juniper Apstra. which component is defined in a template?
Answer: C
Explanation:
A template is a configuration template that defines a network's policy intent and structure. A template can be either rack-based or pod-based, depending on the type and number of racks and pods in the network design. A template includes the following details:
Policies: These are the parameters that apply to the entire network, such as the overlay control protocol, the ASN allocation scheme, and the underlay type.
Structure: This is the physical layout of the network, such as the type and number of racks, pods, spines, and leaves. The structure also defines the leaf-to-spine interconnection, which is the number and type of links between the leaf and spine devices. The leaf-to-spine interconnection can be either single or dual, depending on the redundancy and bandwidth requirements.
Therefore, the correct answer is A. the leaf-to-spine interconnection. This is a component that is defined in a template, as it determines the physical connectivity of the network. The speed of the links, the number of spine devices, and the definition of IP pools are not components that are defined in a template, as they are either derived from the device profiles, the resource pools, or the blueprint settings.
NEW QUESTION # 56
In the EVPN-VXLAN data center fabric bridged overlay architecture shown in the exhibit, the servers are connected to Lead and Leat6 using the same virtual network identifier (VNI). Which two statements are correct in this scenario? (Choose two.)
Answer: C,D
Explanation:
In the EVPN-VXLAN data center fabric bridged overlay architecture shown in the exhibit, the servers are connected to Leaf1 and Leaf6 using the same virtual network identifier (VNI). This means that the servers belong to the same Layer 2 domain and can communicate with each other using VXLAN tunnels across the fabric. The underlay network provides the IP connectivity between the leaf and spine devices, and it uses EBGP as the routing protocol. Therefore, the following two statements are correct in this scenario:
Loopback IPv4 addresses must be advertised into the EBGP underlay from leaf and spine devices. This is because the loopback addresses are used as the source and destination IP addresses for the VXLAN tunnels, and they must be reachable by all the devices in the fabric.
The loopback addresses are also used as the router IDs and the BGP peer addresses for the EBGP sessions.
The underlay EBGP peering's must be established between leaf and spine devices. This is because the EBGP sessions are used to exchange the underlay routing information and the EVPN routes for the overlay network. The EBGP sessions are established using the loopback addresses of the devices, and they follow a spine-and-leaf topology, where each leaf device peers with all the spine devices, and each spine device peers with all the leaf devices.
NEW QUESTION # 57
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