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| Certification Vendor: | Juniper Networks |
|---|---|
| Exam Name: | Juniper Networks Certified Specialist - Data Center (JNCIS-DC) Exam |
| Exam Number: | JN0-481 |
| Passing Score: | 70% |
| Real Exam Qty: | 65 |
| Exam Duration: | 90 minutes |
| Exam Format: | Multiple Choice, Multi-Response |
| Exam Price: | $150 USD |
| Related Certifications: | JNCIA-DC (Data Center, Associate) JNCIE-DC (Data Center, Expert) JNCIP-DC (Data Center, Professional) |
| Available Languages: | English |
| Certificate Validity Period: | 3 years |
| Recommended Training: | Juniper Data Center Architectures Juniper Apstra Essentials |
| Exam Registration: | Pearson VUE Registration |
| Sample Questions: | Juniper JN0-481 Sample Questions |
| Exam Way: | Online proctored or Onsite at Pearson VUE test centers |
| Pre Condition: | Recommended: JNCIA-DC (Data Center, Associate) certification or equivalent knowledge |
| Official Syllabus URL: | https://www.juniper.net/training/certification/tracks/data-center/jncis-dc.html |
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NEW QUESTION # 17
You want to gracefully take a device out of service to perform an OS upgrade. How would you accomplish this task using Juniper Apstra?
Answer: C
NEW QUESTION # 18
Which two statements about VXLAN VNIs are correct? (Choose two.)
Answer: A,B
Explanation:
VXLAN VNIs are virtual network identifiers that are used to identify and isolate Layer 2 segments in the overlay network. VXLAN VNIs have the following characteristics:
VNIs can have over 16 million unique values. This is because VXLAN VNIs are 24-bit fields that can range from 4096 to 16777214, according to the VXLAN standard. This allows VXLAN to support a large number of Layer 2 segments and tenants in the network. VNIs identify a broadcast domain. This is because VXLAN VNIs are used to group the end hosts that belong to the same Layer 2 segment and can communicate with each other using VXLAN tunnels. The VXLAN tunnels are established using the VTEP information that is distributed by EVPN. The VTEPs are VXLAN tunnel endpoints that perform the VXLAN encapsulation and decapsulation.
The VXLAN tunnels preserve the Layer 2 semantics and support the broadcast, unknown unicast, and multicast traffic within the same VNI.
NEW QUESTION # 19
What does EVPN use lo identity which remote leaf device advertised the EVPN route?
Answer: D
Explanation:
EVPN uses a route distinguisher (RD) value to identify which remote leaf device advertised the EVPN route. An RD is a 64-bit value that is prepended to the EVPN NLRI to create a unique VPNv4 or VPNv6 prefix. The RD value is usually derived from the IP address of the PE that originates the EVPN route. By comparing the RD values of different EVPN routes, a PE can determine which remote PE advertised the route and which VRF the route belongs to.
NEW QUESTION # 20
What are three valid resource types supported within Juniper Apstra? (Choose three.)
Answer: C,D,E
Explanation:
In Apstra 5.1, resources are values that must be allocated uniquely and consistently across a fabric so Apstra can render deterministic, conflict-free configurations. These values are managed through resource pools, which provide ranges (or sets) of assignable identifiers that Apstra can automatically allocate to blueprint elements during build and deployment.
Three valid resource pool types in Apstra are ASN pools, VNI pools, and integer pools. ASN pools supply Autonomous System Numbers used in IP fabric underlays (commonly eBGP in three-stage Clos), ensuring each device or role receives the correct AS assignment without manual tracking. VNI pools supply VXLAN Network Identifiers for overlay segmentation in EVPN-VXLAN fabrics. Apstra uses these to create scalable tenant segments where the VNI uniquely identifies the broadcast domain in the overlay, and Junos v24.4 devices (leaf VTEPs) are configured accordingly. Integer pools provide generic numeric values used mainly in Freeform-style designs or in situations where a template needs a consistent allocated integer (for example, a custom ID used by a configlet or another allocation-driven construct).
"Routing zone pools" and "interface pools" are not resource pool types in Apstra. Routing zones (VRFs) are blueprint design objects, and interfaces are physical/logical constructs, but neither is consumed as an allocatable "pool" resource type in the Apstra resource catalog model.
NEW QUESTION # 21
Which attribute enables Juniper Apstra to scale and manage thousands of devices with a single server instance?
Answer: D
Explanation:
The attribute that enables Juniper Apstra to scale and manage thousands of devices with a single server instance is that Apstra is a distributed state system. This means that Apstra uses a graph database to store the network topology and configuration data in a distributed and replicated manner across multiple server nodes. This allows Apstra to handle large-scale networks with high performance, reliability, and availability. Apstra also uses a stateful orchestration engine that ensures the network state is always consistent with the intent of the blueprint, which is the logical representation of the network design and behavior. Apstra can automatically detect and resolve any discrepancies between the desired and actual network state, as well as handle any changes or failures in the network. The other options are incorrect because:
A . Apstra is installed as a cloud resource is wrong because Apstra can be installed either as a cloud resource or as an on-premises resource. Apstra is available as a virtual machine image that can be deployed on various hypervisors, such as VMware ESXi, QEMU/KVM, Microsoft Hyper-V, or Oracle VirtualBox. Apstra can also be deployed on public cloud platforms, such as Amazon Web Services (AWS) or Microsoft Azure. However, the installation method does not affect the scalability of Apstra, which is determined by the distributed state system architecture.
B . Apstra is based on NGINX is wrong because Apstra is not based on NGINX, but on Python and Django. NGINX is a web server and reverse proxy that Apstra uses to serve the web user interface and the REST API. However, NGINX is not the core component of Apstra, and it does not affect the scalability of Apstra, which is determined by the distributed state system architecture.
C . Apstra is available as an OVA is wrong because Apstra is available as an OVF, not an OVA. An OVF (Open Virtualization Format) is a standard format for packaging and distributing virtual machine images. An OVA (Open Virtual Appliance) is a single file that contains the OVF and the virtual disk images. Apstra provides an OVF file that can be imported into various hypervisors, such as VMware ESXi, QEMU/KVM, Microsoft Hyper-V, or Oracle VirtualBox. However, the availability of Apstra as an OVF does not affect the scalability of Apstra, which is determined by the distributed state system architecture. Reference:
JUNIPER APSTRA ARCHITECTURE
Apstra Server Requirements/Reference
Juniper Networks Apstra 4.0 enhances the experience of users and operators
NEW QUESTION # 22
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