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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% |
| Available Languages: | English |
| Certificate Validity Period: | 3 years |
| Exam Price: | $150 USD |
| Exam Duration: | 90 minutes |
| Real Exam Qty: | 65 |
| Exam Format: | Multiple Choice, Multi-Response |
| Related Certifications: | JNCIE-DC (Data Center, Expert) JNCIA-DC (Data Center, Associate) JNCIP-DC (Data Center, Professional) |
| 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 # 71
You want to remove a leaf device from a Juniper Apstra blueprint permanently. What is the correct high-level sequence of steps?
Answer: D
Explanation:
To safely and permanently remove a leaf device from a Juniper Apstra blueprint, the device should first be set to Drain mode to gracefully move traffic away from it, then transitioned to Undeploy mode to remove its configuration from the device. Once undeployed, the device can be safely removed from the blueprint without causing disruption to the rest of the fabric.
NEW QUESTION # 72
You are building a blueprint using Juniper Apstra and must change the cable map to match the physical environment.
Where in the blueprint UI is this task accomplished?
Answer: C
Explanation:
To modify the cable map in Juniper Apstra so it matches the actual physical environment, you must do it in the Staged โ Physical โ Links section of the blueprint UI. Changes made in the staged view allow adjustments before committing them to the active fabric.
NEW QUESTION # 73
Exhibit.
Referring to the exhibit, which role does Device A serve in an IP fabric?
Answer: D
Explanation:
Device A serves as a spine in an IP fabric. An IP fabric is a network architecture that uses a spine-leaf topology to provide high performance, scalability, and reliability for data center networks. A spine-leaf topology consists of two layers of devices: spine devices and leaf devices. Spine devices are the core devices that interconnect all the leaf devices using equal-cost multipath (ECMP) routing. Leaf devices are the edge devices that connect to the servers, storage, or other network devices. In the exhibit, Device A is connected to four leaf devices using multiple links, which indicates that it is a spine device. The other options are incorrect because:
A . leaf is wrong because a leaf device is an edge device that connects to the servers, storage, or other network devices. In the exhibit, Device A is not connected to any servers, storage, or other network devices, but only to four leaf devices, which indicates that it is not a leaf device.
C . super spine is wrong because a super spine device is a higher-level device that interconnects multiple spine devices in a large-scale IP fabric. A super spine device is typically used when the number of leaf devices exceeds the port density of a single spine device. In the exhibit, Device A is not connected to any other spine devices, but only to four leaf devices, which indicates that it is not a super spine device.
D . server is wrong because a server device is a compute or storage device that connects to a leaf device in an IP fabric. A server device is typically the end host that provides or consumes data in the network. In the exhibit, Device A is not connected to any leaf devices, but only to four leaf devices, which indicates that it is not a server device. Reference:
IP Fabric Underlay Network Design and Implementation
IP Fabric Overview
IP Fabric Architecture
NEW QUESTION # 74
You are performing an upgrade to your switches in your network. You want to ensure that the upgrade can be performed without interrupting traffic. In the Juniper Apstra UI, which deploy mode should be used to accomplish this task?
Answer: D
Explanation:
In Apstra, Deploy Mode = Drain is the operational mechanism used to gracefully remove a switch from active forwarding before performing maintenance such as an OS upgrade. Drain mode is specifically intended to drain traffic while preserving fabric stability, so that maintenance can be executed with minimal to no application impact, provided the fabric design has sufficient redundancy (for example, ECMP in the underlay and dual-homing/ESI for server attachments). In an EVPN-VXLAN IP fabric, taking a leaf or spine abruptly out of service can cause transient loss of reachability as underlay adjacencies reconverge and the overlay recalculates paths. By placing the device into Drain, Apstra adjusts intent so that traffic is shifted away from the device as much as possible, reducing dependency on it before the upgrade begins.
This is different from Undeploy, which removes Apstra-rendered configuration and is generally used for decommissioning; if a device is carrying traffic, Apstra guidance is to drain first. Ready is a pre-deploy state used in lifecycle workflows, not a maintenance traffic-shifting mode. Deploy keeps the device fully participating. Therefore, for a maintenance window where the goal is "upgrade with minimal interruption," the correct mode is Drain, then perform the Junos v24.4 upgrade, and finally return the device to Deploy.
Verified Juniper sources (URLs):
https://www.juniper.net/documentation/us/en/software/apstra4.2/apstra-drain-mode/apstra-drain-mode.pdf
https://www.juniper.net/documentation/us/en/software/apstra4.2/apstra-user-guide/topics/topic-map/deploy-mode-update-datacenter.html
https://www.juniper.net/documentation/us/en/software/apstra6.0/apstra-user-guide/topics/topic-map/device-config-lifecycle.html
NEW QUESTION # 75
Using the Juniper Apstra multitenancy capabilities, which approach will allow a tenant to interconnect two different routing zones?
Answer: C
Explanation:
A routing zone is an L3 domain, the unit of tenancy in multi-tenant networks. You create routing zones for tenants to isolate their IP traffic from one another, thus enabling tenants to re-use IP subnets. In addition to being in its own VRF, each routing zone can be assigned its own DHCP relay server and external system connections. You can create one or more virtual networks within a routing zone, which means a tenant can stretch its L2 applications across multiple racks within its routing zone. For virtual networks with Layer 3 SVI, the SVI is associated with a Virtual Routing and Forwarding (VRF) instance for each routing zone isolating the virtual network SVI from other virtual network SVIs in other routing zones. If you're using multiple routing zones, external system connections must be from leaf switches in the fabric. Routing between routing zones must be accomplished with external systems.
NEW QUESTION # 76
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